LAUNCH CSM a must for DP to work?

[blukas69]

"'m also quite certain this isn't a driver issue, as the situation occurs PRIOR to windows load. It's either monitor, or bios. Card works perfectly fine CSM disabled on my other monitor. Oh FYI my other system is the Z590E wifi strix board with a 10900KF. if that helps.[/QUOTE]


My problem was before windows loaded also. After a week of trying everything in the book. It was a driver issue, That I would of never thought since it was only a week old install. But i really think it was my old monitor driver causing the issue. Since i bought back in 2012.

Hope you get it worked out. These forums have helped me a bunch. Just don't take any advice unless your sure.

[Zorlac01]

thanks! Spent 4 hrs, with reseating, battery removals, and EVRYTHING else I read, and could have thought of. At the end of it all, i hooked up my other 1440P predator monitor, and it works like a charm. I'm pretty certain the 4K 120hz Predator I have doesn't somehow support this card for whatever reason. I t was the first of it's kind in terms of 120HZ at 4k. I've had since they came out, hopefully in the near future somekind of driver/firmware will fix the issue...

[Zorlac01]

Figured I'd update this as maybe it could help someone in the future..
I acquired an Asus xg279q. When hooking it up to the 3080ti with display port, and ABSOLUTELY NO MONITOR OVERCLOCKING (144hz only) It works perfectly. I can enter bios, enable resizeable bar etc... As soon as I bump the monitor to 165 or 170, No signal detected, straight to windows splash.... unless of course I enable CSM. Updated drivers, cleaned with DDU, reinstalled twice, same thing..

[Zorlac01]

also forgot to mention, the white light stays on. The one on the top of the HERO board, indicating a VGA issue...

[Zorlac01]

SOLVED! FINALLY! I'm posting the solution for new 3080ti owners suffering from this dilemma. Initial 3080ti Founder's edition cards came with a bios suffix ending in 01.
These cards were the first batch at best buy. A few weeks later the second batch arrived bearing the CA suffix bios. I had the 01 bios. SOMEBODY, (i'd love to buy this guy a beer!)
posted the CA bios in tech power up. Although this was not a VERIFIED bios by TPU, I just HAD to try it. Using Nvflash64, I flashed to this bios and ALL my problems went away.
The card doesn't shut off anymore, no mobo light on, bios option is fine, CSM disabled, resizeable bar enabled, etc...

Hope this helps someone faster than it took me to fix it. Thanks to all who shared my pain.

[Saltgrass]

Funny, since I suggested that process in the second response...

[Zorlac01]

Funny, since I suggested that process in the second response...

yes, HOWEVER, the 2nd bios was not there yet, OR I was unable to find another bios, but thank you.

[7rank]

SOLVED! FINALLY! I'm posting the solution for new 3080ti owners suffering from this dilemma. Initial 3080ti Founder's edition cards came with a bios suffix ending in 01.
These cards were the first batch at best buy. A few weeks later the second batch arrived bearing the CA suffix bios. I had the 01 bios. SOMEBODY, (i'd love to buy this guy a beer!)
posted the CA bios in tech power up. Although this was not a VERIFIED bios by TPU, I just HAD to try it. Using Nvflash64, I flashed to this bios and ALL my problems went away.
The card doesn't shut off anymore, no mobo light on, bios option is fine, CSM disabled, resizeable bar enabled, etc...

Hope this helps someone faster than it took me to fix it. Thanks to all who shared my pain.

I know this is an old thread, but I just purchased a new ROG Strix z690-E motherboard, and I allready had a Nvidia Geforce RTX 1050 Ti that I plugged in, and was using Dsiplay port with this for the last couple years on an old Asus PX6-58DE mobo..
anyways the only way I can get Display port to work on the new z690, is to have "Launch CSM" Enabled. HDMI will work fine with CSM disabled.
But not Display port. If CSM is disabled, the Q_Code cycles for a while and the white light just comes on and there is no display at all. I can't even get to BIOS.
But if I switch to HDMI cable, all is fine.
I did try all PCie slots and other monitors to no avail.
There is something with CSM (Compatibilty support module) that must be enabled in order for the Display port to work on this new mobo.
I never tried any other settings with PCie slots , I just did the F5 to load defaults, as I am very new to this mobo and still trying to figure it all out...
I really could use some suggestions or help if anyone knows about this.
Thanks in advance.
PS: I did upgrade the bios to latest before hand.

[Jesseinsf]

VBIOS version ending in "CA"

I cannot access the System BIOS If I reboot my PC. I can access the System BIOS if I turn on my PC from a shutdown.


System Specs:
ASUS ROG Maximus XI Extreme motherboard (Z390)
Intel Core i9 9900k
Windows 11 Pro for Workstations
128GB of Corsair RGB Vengeance Pro RAM
Samsung 980 Pro and 970 Pro 1TB each (Total 2TB)
GeForce RTX 3080 TI Founders Edition
1200-watt Power Supply (Cooler Master V1200)
Creator PS321URV 32-inch 4K monitor (Vesa Certified DisplayHDR 600) via DisplayPort.


Things I tried to diagnose the issue:


Ran the DisplayID fix, and it said that I already had the latest update
Fresh installed Windows 11 twice (didn't fix anything)
I bought a second 3080 TI FE to see if the new card did the same thing. (Same issue)
Doesn't seem to be an issue with other monitors in my house
My 2080 TI FE does not have this issue
Some LG monitors have a similar issue (Manual@nvidia.com said they are working on a fix)
No issue if I enable CSM (However, Resizable Bar doesn't work, and Windows 11 will not install unless I do some serious hackery)
HDMI has the same issue


When rebooting:
Asus motherboards show the CPU temperature in a red digital readout. Above this readout there are four LED lights "Red, Yellow, White, and Green". When I reboot, it lights up as follows: Red, Yellow, Green, and then White. Once the white light turns on, it will not turn off. If I reboot, then the monitor will not turn on until Windows log-in screen loads (shows)


Turn on PC from a shutdown:
If I turn the PC on from a shutdown then it lights up as follows: Red, Yellow, Green, White, Green, then off. Everything is normal.

[prymortal69]

I know this is an old thread, but I just purchased a new ROG Strix z690-E motherboard, and I allready had a Nvidia Geforce RTX 1050 Ti that I plugged in, and was using Dsiplay port with this for the last couple years on an old Asus PX6-58DE mobo..
anyways the only way I can get Display port to work on the new z690, is to have "Launch CSM" Enabled. HDMI will work fine with CSM disabled.
But not Display port. If CSM is disabled, the Q_Code cycles for a while and the white light just comes on and there is no display at all. I can't even get to BIOS.
But if I switch to HDMI cable, all is fine.
I did try all PCie slots and other monitors to no avail.
There is something with CSM (Compatibilty support module) that must be enabled in order for the Display port to work on this new mobo.
I never tried any other settings with PCie slots , I just did the F5 to load defaults, as I am very new to this mobo and still trying to figure it all out...
I really could use some suggestions or help if anyone knows about this.
Thanks in advance.
PS: I did upgrade the bios to latest before hand.

Sad to say there is far to much I need to write here, so i'm going shorten it down from 4 pages, but Z690-F strix same thing, can confirm you need CSM Enabled for DP ports to work on 3 EVGA 3080 GPU's, 2 are KR 10GB one is KL 12GB, 100% of the time. without it you generally get a 3 day cycle of working then pure cancer & need a HDMI TV to get into bios to turn on CSM to fix the issue.
As for how i know once again to much to write hdr/10bit/csm/driver/software e.t.c. all tested, bios changes tested, ram multiple sets, psu multiple units, MB, CPU, Nvme's (GPT) e.t.c. multiple tested. Monitors multiple tested the one with a original DP port 1.2 Asus & the Viewsonic DVI to DP port adaptor did work. but nothing modern LG, Asus & MSI. e.t.c e.t.c. & Many many more e.t.c.
I should mention at this point those GPU's have the firmware fix for DP ports & Resizebar. So it was at that point + above I went outside the box just to find out it was the Asus Motherboard & CSM causing DP ports not to work. Bios 1003, 1304,1403, 1505 all tested with same result.

Only thing not tried is 3060-3090 & another brand because obviously no one will give me one for free to try & i'm sure as hell not buying a 4th GPU just to get the same result.