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gokica
01-30-2013, 11:14 PM
I am building this thread upon the following:

http://rog.asus.com/forum/showthread.php?28571-Strange-flickering-pulsing-of-screen-on-low-brightness&country=&status=

But I am opening the new topic because it is model specific (G75VX).

This model comes with AUO B173HW02 V1 monitor panel (mate non-3D).

It works great except that I noticed weird flicker in one specific situation:

http://img9.imageshack.us/img9/669/screenhunter02jan310009.png

Owners of G75VX please reply to this thread and let me know whether your screen flickers on the image above as mine.

The flicker is present at native resolution 1920 X 1080 and at default 32bit color.

Thanks.

Walkir
01-30-2013, 11:34 PM
And I thought I had problems due to the Chi Mei CMO1720 panel in my Asus G75VX. Makes me start to wonder if it's something else that's causing all the troubles.

Glad I finally decided to RMA the Asus for a refund.

Pitcher@asus
01-31-2013, 03:26 AM
how long have user uses than flickering and how to user use than flickering like overclock or play game, watch movie?

gokica
01-31-2013, 07:48 AM
how long have user uses than flickering and how to user use than flickering like overclock or play game, watch movie?

Can you please rephrase this. I do not understand. If it is a question posed to me I have a brand new laptop with this issue. I do not notice the flicker in other situations but just in the image above.

gokica
01-31-2013, 09:27 PM
It seems like the flicker goes away if I set the brightness to 40%, contrast to 22 or 47% and gamma to 81%. All other settings the image above flickers. Nvidia drivers 310.83 by ASUS.

It is obvious that no other owner of G75VX sees the image above with flicker. I guess my monitor is faulty.

StreetGT
01-31-2013, 09:45 PM
i see the image flicker too, but i think it's nothing, i'm more worried abou horizontal lines at dark color.

gokica
01-31-2013, 10:07 PM
I do not see the flicker on my desktop monitor and on my other laptops at home and work.

I know it is nothing but keeps bothering me since I have not noticed this anomaly on any other panel/monitor. And I just bought the laptop.

Thanks for your response.

Dreamonic
01-31-2013, 10:46 PM
I can confirm this and also running V1.

It'a called: Pixel-Walk

From what I read, most cheap 6bit TN and IPS panels have similar results. The AUO B173HW02 V1 is 6bit.

"This is not a problem on it's own as the PWM frequency is always high enough that the human eye can not perceive it. The problem is when this frequency or it's harmonics are close a frequency of the LCD, patterns will be created in the light intensity called beat patterns. Since these beat patterns are dependent on the absolute frequency of the LCD and LED PWM, and since each GPU and the LED PWM are sourced from different clocks, the issue will be different for every motherboard, and will vary with such things as voltage and temperature."

http://www.lagom.nl/lcd-test/inversion.php#clickshow (http://www.lagom.nl/lcd-test/inversion.php#inversion-all.png)

Notice how certain boxes will flicker after you locate your browser window to a different corner of the screen.

It's inherit by cheaper hardware component control and calibration.

veer01_42
01-31-2013, 11:18 PM
Tried the 85hz, works on asus g75vw. Forced it in my nvidia control software.

gokica
02-01-2013, 12:04 AM
Thanks Dreamonic. I am sorry to hear that you and the rest of the people replying to this thread see the flicker too.

At the same time it is also pointing that my laptop screen is the same as the panels in the entire line of ASUS laptops.

I tried lagom tests the first day when I got the screen but did not notice pixel walk. I do not see it even now on the blocks on their site no matter where I place the firefox window. Only the image above in this thread is flickering constantly no matter where it is located on the screen.

Thank you once again.

85Hz on the VX is reducing the flicker but not completely. Also the picture is getting oddly brighter so it is obvious that 85Hz is not in line with the pixels speed. The maximum speed without distortion is 74Hz on my panel. And it does not eliminate the flicker.

StreetGT
02-01-2013, 12:38 AM
Thanks Dreamonic. I am sorry to hear that you and the rest of the people replying to this thread see the flicker too.

At the same time it is also pointing that my laptop screen is the same as the panels in the entire line of ASUS laptops.

I tried lagom tests the first day when I got the screen but did not notice pixel walk. I do not see it even now on the blocks on their site no matter where I place the firefox window. Only the image above in this thread is flickering constantly no matter where it is located on the screen.

Thank you once again.

85Hz on the VX is reducing the flicker but not completely. Also the picture is getting oddly brighter so it is obvious that 85Hz is not in line with the pixels speed. The maximum speed without distortion is 74Hz on my panel. And it does not eliminate the flicker.

Open this image and tell us if you see like horizontal lines http://i.imgur.com/7kTcL.png

gokica
02-01-2013, 12:55 AM
Open this image and tell us if you see like horizontal lines http://i.imgur.com/7kTcL.png

No horizontal lines visible. The brown square surface is "smooth" on my VX screen.

k1llertech
02-01-2013, 03:56 AM
Hi there! I have the same problem like gokica. The picture StreetGt posted have horizontal lines on my screen. I'm not sure its flickering because it's too small, but there are some lines positively. Should I trow the notebook from the window?

StreetGT
02-01-2013, 08:41 AM
Hi there! I have the same problem like gokica. The picture StreetGt posted have horizontal lines on my screen. I'm not sure its flickering because it's too small, but there are some lines positively. Should I trow the notebook from the window?

thats a problem. I'm waiting from someone from Asus to give us here an answer about this proble, if it's a driver problem or if we need to RMA.

Dreamonic
02-01-2013, 10:07 AM
Trying to put the pieces of the puzzle together so bare with me.

My theory..

I believe these flickering issues is because OUR Integrated Graphics Processor chip is disabled. Normally when enabled and functioning, it would handle the processing of our displays. It automatically cycles down from 60-40Hz for power saving features (without software) changes display brightness controlling IGP voltage etc..

It could be coincidental but the IGP is not disabled via BIOS, it is through the MB design ASUS used so they could disable it's pass-through link via the H77 chipset. Still, it's probable that it is still functioning through circuitry and likely to be the cause for our screen flickering problems in the frontend. Seeing as how the modded VBIOS unlocks the IGP settings it means it's still functioning, otherwise it wouldn't show up.

The IGP being disabled also results in it not getting clocked, but since it is shared it's likely the disabled IGP chip is still getting clocked. Whether that it may still be receiving clocking but not perform any function is the question right now.

As I posted on the 1st page regarding our screens..

"This is not a problem on it's own as the PWM frequency is always high enough that the human eye can not perceive it. The problem is when this frequency or it's harmonics are close a frequency of the LCD, patterns will be created in the light intensity called beat patterns. Since these beat patterns are dependent on the absolute frequency of the LCD and LED PWM, and since each GPU and the LED PWM are sourced from different clocks, the issue will be different for every motherboard, and will vary with such things as voltage and temperature."


This proves my theory into a fact.


Explains why ASUS can't do anything. Probably was a poor design decision made by them and didn't think it would escalate this far or if it would even become what it has been. But that is my take on it.


Peace

r33fd
02-01-2013, 10:29 AM
I'm disappointed with ASUS build quality too . My g75vw had problems with weird red pixels appearing on display in certain situation ! (http://rog.asus.com/forum/showthread.php?27963-G75VW-red-pixels-on-the-screen-issue)

boofsterb
02-01-2013, 03:07 PM
I am building this thread upon the following:

http://rog.asus.com/forum/showthread.php?28571-Strange-flickering-pulsing-of-screen-on-low-brightness&country=&status=

But I am opening the new topic because it is model specific (G75VX).

This model comes with AUO B173HW02 V1 monitor panel (mate non-3D).

It works great except that I noticed weird flicker in one specific situation:

http://img9.imageshack.us/img9/669/screenhunter02jan310009.png

Owners of G75VX please reply to this thread and let me know whether your screen flickers on the image above as mine.

The flicker is present at native resolution 1920 X 1080 and at default 32bit color.

Thanks.

I have a G75VW-DH73 with a 120hz samsung panel. When i set my monitor to 60hz I see the flicker on your website screenshot image.
but when I'm at 120hz the image seems to appear normaL

gokica
02-01-2013, 03:09 PM
I have a G75VW-DH73 with a 120hz samsung panel. When i set my monitor to 60hz I see the flicker on your website screenshot image.
but when I'm at 120hz the image seems to appear normaL

Thank you for the response. I wish I took the 120Hz model.

mynewrog
04-18-2013, 02:28 PM
Hi, I've started a new thread on this one some two hours ago but I don't know why it's not showing up. Anyway my question is where are we on this one? I have the same problem with the dreaded AUO B173HW02 V1 panel that is installed on BHI7N11 and I am not leaving it be. From what I understand the problem does not exist on other G75 panels such as the one used in the DH73 version, which is a 3d-120Hz panel.

I don't care one bit for 3D but if that panel is working as it should and if it is compatible with my G75VX (which I assume it is) then I am demanding a replacement. I could even look for it online and buy it and install it myself If it wasn't such a new purchase, that's what drives me crazy.

Has there been another way to solve this by software means?

gokica
04-18-2013, 03:34 PM
No resolution as far as I am concerned.

Sagi
04-18-2013, 04:03 PM
I see the flicker.. But tbh it's not something I had any previous experience with while I had my G75VX.

Games run smooth etc. and overall I'm really happy with the laptop - Might just be me, but personally I don't have any problems with it..

When exactly does this flickering become a problem for everyone else ?

jsarver
04-18-2013, 04:13 PM
im in the same boat^

mynewrog
04-18-2013, 04:51 PM
This sounds so bad, especially since more and more people are confirming this. Well it starts to become a problem when you are working on static, dark colored backgrounds, certainly not games.

I can't believe anyone who uses the laptop for other than gaming does not notice or is bot annoyed by this. It is just like a constant alert for your eyes with no apparent reason. I would avoid this laptop like hell If I had only been able to test it beforehand. Screen quality/behaviour is not something I would accept cutting corners and apparently it is just that that ASUS has done by choosing such a low-quality panel.

The advice I got today was to do a Refresh of Windows. Why I doubt this will change anything? I am certainly not giving up though, it is our obligation to at least warn future customers that have decent screen expectations. I could leave with a less bright screen or with lower color gamut but this is something I just can't get used to.

StreetGT
04-18-2013, 04:59 PM
This sounds so bad, especially since more and more people are confirming this. Well it starts to become a problem when you are working on static, dark colored backgrounds, certainly not games.

I can't believe anyone who uses the laptop for other than gaming does not notice or is bot annoyed by this. It is just like a constant alert for your eyes with no apparent reason. I would avoid this laptop like hell If I had only been able to test it beforehand. Screen quality/behaviour is not something I would accept cutting corners and apparently it is just that that ASUS has done by choosing such a low-quality panel.

The advice I got today was to do a Refresh of Windows. Why I doubt this will change anything? I am certainly not giving up though, it is our obligation to at least warn future customers that have decent screen expectations. I could leave with a less bright screen or with lower color gamut but this is something I just can't get used to.

Nah, still the same, It's my 2nd Screen in Laptop from RMA and horizontal lines still there.
It's a problem in all screens, i just hope there will be a fix for this.

mynewrog
04-18-2013, 05:34 PM
Just so that we have common reference system, everybody with a BHI7N11 that runs at 1920x1080@60Hz please try this:

1) Nvidia settings: Brightness:50%, Contrast:42%, Gamma:0.89

2) Laptop's brightness on level 5 (if you consider the lowest setting as 0) or 6 (if you consider the lowest setting as 1).

3) On Windows 8, search for "Customize your start screen", open it and select the 3rd color combo (blue-ish grey/blue buttons). When you do, just drag that screen to the right (it will occupy around 1/5 of your screen) and see the rest of the screen in that grey background.

Do you see the flicker? Is it something that any other of your screens that ran at their recommended settings have done in the past?

compurocker
04-18-2013, 07:46 PM
No horizontal lines visible. The brown square surface is "smooth" on my VX screen.

Smooth even colored brown surface. No horizontal lines or other abnormalities.

compurocker
04-18-2013, 08:30 PM
I centered the screenshot posted by gokica and let it sit for a few minutes. It is a difficult picture to see clearly but I assume that was done on purpose. It never started flickering.

mynewrog
04-19-2013, 07:38 AM
The picture looks ok in mine as well so could be a different issue. Did you try the procedure I posted above to reproduce the flickering?

compurocker
04-19-2013, 08:54 PM
Not yet. Thus far everything it has worked great and I haven't noticed any problems in anything I have done with the machine. I will probably attempt it I just haven't yet. I am hoping not to have any issues with mine. Out of the box it ran smooth quick and cool. Decent Audio/Video. When I am done with the upgrades I have planned it is going to be more machine than so many desktops were just a few years ago. I have always loved ASUS boards. Hopefully good BIOS upgrades and other treats from ASUS will keep it opening up....

compurocker
04-19-2013, 09:10 PM
http://www.lagom.nl/lcd-test/inversion.php#inversion-all.png

I tried the test Dreamonic posted and even at full screen size I had no issues. Not the most comfortable images to stare at but effective in it's testing of the issue at hand.

Sagi
04-19-2013, 09:55 PM
4a flickers on my screen.. Rest seems oki.

compurocker
04-20-2013, 04:36 PM
My question would be has anyone seen this flickering while actively involved in a game or while actively using video intensive software?

SkilletIsRollen
04-22-2013, 05:41 PM
Hey man sorry you have the infamous flicker of doom, 2 things, one if your are still within a return period return it. If not RMA isn't going to solve anything typically because they have no idea what they are doing, or even care.
What I did to get rid of my flicker is raised my screen refresh rate in Nvidia control panel to 67 on a older DS72 g75. Its worth a try, it almost eliminated most of my flickering problem, if not try a few other refresh rates higher then 60 a shot. Hope this helps.

verkkopeli
04-27-2013, 10:24 AM
@compurocker
World of Tanks garage screen has darkish gray colour scheme, and it flickers slightly on my VX. And yes, the box on the first page of this thread flickers like hell :(

I'm using my VX for work too, and the flicker is a nuisance. Takes its toll on my eyes, it's headache-inducing. In general the flicker is not there, and it can be reduced somewhat with lower gamma, but for the price I paid for the machine I would certainly have expected better. I hope there is a solution to this, but so far one has apparently not been presented by ASUS.

This is especially annoying because I'm otherwise very happy with my VX.

ny2lond
07-03-2013, 10:07 PM
Guys, I've just tested it on my G75VW (the one with CHI MEI display) the test site with the patterns. http://www.lagom.nl/lcd-test/inversion.php#inversion-all.png. Guess what, even with the 67Hz trick I found out it still flickered.

So... I played around with the refresh rate and did create a 91Hz refresh rate. It's stable, no artefacts, no crosstalk and especially, NO MORE FLICKER. Tested on all of the backlight options: from low to bright.

The screen seems stable till around 100Hz, but only 91Hz does the trick! If you do see artefacts or rather weird coloured ghosting effects, just press ESC while testing the refresh rate.

Here is a simple walkthrough:

Open Nvidia Control Panel ->Adjust desktop size and position and select full screen.

Next, go to change resolution -> Customize -> Create Custom resolution -> Type 91 in refresh rate. Make sure Scan type is set to Progressive and hit test. If all works well, select yes.

* * * After this, there should be a Custom with you creation, above PC list. Select it, press the drop-down list and select 91 Hz with 32-bit Colour depth and hit apply.
Whatever way you manage to create that 66Hz, always do the "* * *" part.

Again, this is to tweak the ChiMei CMO panel, but try it on yours as well. Fingers crossed!

Akki
07-04-2013, 01:32 AM
Guys, I've just tested it on my G75VW (the one with CHI MEI display) the test site with the patterns. http://www.lagom.nl/lcd-test/inversion.php#inversion-all.png. Guess what, even with the 67Hz trick I found out it still flickered.

So... I played around with the refresh rate and did create a 91Hz refresh rate. It's stable, no artefacts, no crosstalk and especially, NO MORE FLICKER. Tested on all of the backlight options: from low to bright.

The screen seems stable till around 100Hz, but only 91Hz does the trick! If you do see artefacts or rather weird coloured ghosting effects, just press ESC while testing the refresh rate.

Here is a simple walkthrough:

Open Nvidia Control Panel ->Adjust desktop size and position and select full screen.

Next, go to change resolution -> Customize -> Create Custom resolution -> Type 91 in refresh rate. Make sure Scan type is set to Progressive and hit test. If all works well, select yes.

* * * After this, there should be a Custom with you creation, above PC list. Select it, press the drop-down list and select 91 Hz with 32-bit Colour depth and hit apply.
Whatever way you manage to create that 66Hz, always do the "* * *" part.

Again, this is to tweak the ChiMei CMO panel, but try it on yours as well. Fingers crossed!

WOW

7a was flickering for me,... changed to 91Hz and they are all displayed with no flickers.

Only thing i notice is that whole picture(Screen) is little more brighter?

Thanks

gokica
07-04-2013, 06:47 AM
Guys the monitor is rated as a 60Hz.

91Hz is very high overclock and is dangerous for its health.

Good luck since in either case you will end up RMA-ing.

I still see the flicker but since RMA where I live will last forever I am not sending it back.

You should try to ask of ASUS to change the screen on your laptop by RMAing.

ny2lond
07-04-2013, 04:41 PM
The screen is rated 60 but it can display anything till 100 Hz (at least from my tests). Moreover, the screen doesn't get hot enough to show a problem (the screen's chip is on the bottom of the panel. Mine gets warm-ish, but it's pretty normal)

I have used mine for a day now and there is absolutely no problem. The refresh rate will just use a bit more power from the graphics card (because that is the one that pumps the Hz up).

Regarding the brightness, I didn't notice that, as I am normally using level 6/10 of brightness.

fakunchas
07-12-2013, 10:38 AM
so, in conclusion.. in order to end the screen flicker

g74 owners should set their frequency to 67hz
g75 owners should set their frequency to 91hz

nirO
07-12-2013, 11:17 AM
i can see the diffrents with 91hz almost no flicker on a gray wab page i used to check ... before it was big time flicker... also it seems all got this flicker pretty standard for asus monitors lol


EDIT: only problem on 91hz is that when u alt+tab from a game to desktop or from desktop to the game it takes way longer to respond... i mean on 60hz its like instant on 91hz it takes like 1-2sec in that time u will have a black screen in front of ya lol

anyone else seen this problem? kind of annoying isan`t it..?

ny2lond
07-12-2013, 07:24 PM
EDIT: only problem on 91hz is that when u alt+tab from a game to desktop or from desktop to the game it takes way longer to respond... i mean on 60hz its like instant on 91hz it takes like 1-2sec in that time u will have a black screen in front of ya lol

anyone else seen this problem? kind of annoying isan`t it..?

Yes, it does take a while because the games still use the 60 HZ. As it's not a standard refresh rate (40 or 60 for those screens), the game switches only to what it reads as standard. If you manage to make 91Hz as a standard resolution then it won't take that much.

To see that I am right, take a normal monitor on a PC and select a refresh rate for desktop and another in the game (GTA IV has this option). You will see that it takes a while (1-2 sec) to adapt.
Another way to see this is if you use the same refresh rate but different resolutions in the game vs. desktop. It takes the same amount of time (1-2 sec) until the screen adjusts to the set resolution.

Cheers!

GottiBoi55
07-13-2013, 12:25 AM
The "fix" for the flicker is 67.08 refresh rate for the "horizontal refresh rate."
(this is the "native resolution")
If it's not already set to this rate, you should change it!
should look like screenshot below!

23234

Hope this helps guys?

nirO
07-13-2013, 02:12 PM
The "fix" for the flicker is 67.08 refresh rate for the "horizontal refresh rate."
(this is the "native resolution")
If it's not already set to this rate, you should change it!
should look like screenshot below!

23234


Hope this helps guys?


this is the standard.. and its not fixed.....

nirO
07-13-2013, 02:19 PM
Yes, it does take a while because the games still use the 60 HZ. As it's not a standard refresh rate (40 or 60 for those screens), the game switches only to what it reads as standard. If you manage to make 91Hz as a standard resolution then it won't take that much.

To see that I am right, take a normal monitor on a PC and select a refresh rate for desktop and another in the game (GTA IV has this option). You will see that it takes a while (1-2 sec) to adapt.
Another way to see this is if you use the same refresh rate but different resolutions in the game vs. desktop. It takes the same amount of time (1-2 sec) until the screen adjusts to the set resolution.

Cheers!


well i cant live with 1-2sec black out since i alt tab all the time from my games...

GottiBoi55
07-13-2013, 03:54 PM
this is the standard.. and its not fixed.....

I would try 75Hz refresh rate then!
I have the "Chi Mei 173HGE" panel, and I don't have any of the problems you guys are experiencing.
You guys must have defective panels, sorry to say!
Time to RMA!

nirO
07-13-2013, 03:59 PM
I would try 75Hz refresh rate then!
I have the "Chi Mei 173HGE" panel, and I don't have any of the problems you guys are experiencing.
You guys must have defective panels, sorry to say!
Time to RMA!

cool story bro... tell me something new.... all i can says ASUS PRODUCTS.... and hell not to theyr support

GottiBoi55
07-13-2013, 04:19 PM
cool story bro... tell me something new.... all i can says ASUS PRODUCTS.... and hell not to theyr support


Yeah, we all know about ASUS support!!!!
We all heard the "HORROR" stories!

ny2lond
07-13-2013, 08:24 PM
The "fix" for the flicker is 67.08 refresh rate for the "horizontal refresh rate."
(this is the "native resolution")
If it's not already set to this rate, you should change it!
should look like screenshot below!

23234

Hope this helps guys?

No, it's not. Please test with all screen brightness settings (fn+f5/f6) on this site. http://www.lagom.nl/lcd-test/inversion.php#inversion-all.png
As you can see, it still flickers pretty bad. The only manageable refresh rate is the 91Hz fix, which is far from perfect, but it works the best.

The 91Hz fix is only for ChiMei CMO1720 matte LCD screen. Each and every ChiMei 1720 panel has this problem. I had a G74 before. Guess what. Changing the refresh-rate helped. I RMA-d my G74 three times until getting a refund and buying my G75. I had 2 G74's in RMA with mine with the same flicker issue and same LCD panel. The refresh rate trick fixed the issue. (a cousin of mine works at ASUS RMA in Romania and I asked him to do that. He confirmed)

GottiBoi55
07-14-2013, 01:37 AM
No, it's not. Please test with all screen brightness settings (fn+f5/f6) on this site. http://www.lagom.nl/lcd-test/inversion.php#inversion-all.png
As you can see, it still flickers pretty bad. The only manageable refresh rate is the 91Hz fix, which is far from perfect, but it works the best.

The 91Hz fix is only for ChiMei CMO1720 matte LCD screen. Each and every ChiMei 1720 panel has this problem. I had a G74 before. Guess what. Changing the refresh-rate helped. I RMA-d my G74 three times until getting a refund and buying my G75. I had 2 G74's in RMA with mine with the same flicker issue and same LCD panel. The refresh rate trick fixed the issue. (a cousin of mine works at ASUS RMA in Romania and I asked him to do that. He confirmed)


Well if you guys properly calibrate the panel, this is not a issue!
I use "DVE HD BASICS" to calibrate all my LED/LCD panels, and don't have this problem (I'm in native resolution 60Hz).
Thats one of the first things I do when I get a new system!
That site you guys are using is showing what calibrated, and uncalibrated panels look like.
Have you all tried to properly calibrate your panels?

You guys need to try this below!


DVE_HDBasics (http://www.videoessentials.com/DVE_HDBasics.php)
http://cdn.shopify.com/s/files/1/0149/8338/products/hdbasicscover_large.png?5080 (http://cdn.shopify.com/s/files/1/0149/8338/products/hdbasicscover.png?5080)

Secret Society
06-26-2015, 11:44 PM
I realize this is kind of an old thread from 2013. Its 2015 now. I was just looking up more information about my LCD technology and came across this thread.
So I decided to post information about my G75VX if it might help someone...

ASUS G75VX BHI7N11

Processor Name: Intel Core i7-3630QM QUAD CORE HT 6MB L3
Video Chipset: NVIDIA GeForce GTX 670MX 3GB DDR5 (192 bit)
Video Bus: PCIe v2.0 x16 (5.0 Gb/s) @ x16 (2.5 Gb/s)
8 GB RAM: 800.0 MHz (DDR3-1600 / PC3-12800)

BIOS Version: G75VX.206 (Still version 206 as the latest version as of 6-26-2015)


Monitor Name: AU Optronics [Model: AUO219D]
Monitor Name (Manuf): AUO B173HW02 V1
Date Of Manufacture: Week: 0, Year: 2012

No visible lines at all. My resolution is set to native 1920 x 1080 32bit 60Hz. I even tried different resolutions. All was fine.