[SOLVED][GPU] No signal with integrated intel & 2k monitor

sobersu · 2024-03-03 22:05:01

Hi, I encountered a very strange problem.

With latest integrated intel gpu + acer v277u impossible to set native resolution, it works only at 1920x1080p.
Edid loaded correctly, default configs enabled 2k@75hz => black screen & no signal.
But with another monitor 2k works without any problem.

Hardware tested:
iGPU: i3-12100, i5-12400, i5-4670k, i5-6600 and nvidia 730,1050,1070
Monitors: viewsonic 3276-2k, acer v277u, 43pus8057-4k

What i have
At windows any combinations are works.
At linux -
viewsonic 3276-2k works with any gpu without problems
v277u works with nvidia and all iGPU, except 12xxx.
12xxx works with 43pus8057 at 4k@60 perfectly.

By logs - edid is correct, modelines correct and all seems like works, no errors anywere.
For example, no difference in logs for 6600 and 12100, same driver(modesetting). modelines are equals.

I think, problem is intel driver, possible it enable some feature for 12xxx igpu, but it's not worked.

Is it possible to view enabled features for intel driver and disable it?

Last edited by sobersu (2024-04-06 16:02:27)

seth · 2024-03-03 22:51:38

Edid loaded correctly, default configs enabled 2k@75hz => black screen & no signal.
But with another monitor 2k works without any problem.

Please post the edids of all three panels attached to one working and one non-working system.

same driver(modesetting)

Are there errors in the Xorg log or the systme journal after attemping the bad modeline?

Is it possible to view enabled features for intel driver and disable it?

systool -vm i915
modinfo i915

sobersu · 2024-03-03 23:55:46

seth wrote:

Are there errors in the Xorg log or the systme journal after attemping the bad modeline?

No errors, and modeline is not bad - it's correct.
Problem not in edid - i checked, it's same on working and non working systems.

2 examples:
v277u + i5 4670k - monitor works out of box at 2k@75. There is default modeline
Modeline "2560x1440"x75.0 296.80 2560 2608 2640 2720 1440 1443 1448 1455 +hsync -vsync (109.1 kHz eP)

v277u + i3 12100 - no signal, system use 2k@75. There is default modeline
Modeline "2560x1440"x75.0 296.80 2560 2608 2640 2720 1440 1443 1448 1455 +hsync -vsync (109.1 kHz eP)
No errors in logs, all tools show what monitor connected at 2k@75.

Thanks for info about features, i will compare it on two systems.

seth · 2024-03-04 07:49:11

No errors, and modeline is not bad - it's correct.

It doesn't do what you want…

Please don't paraphrase, https://bbs.archlinux.org/viewtopic.php?id=57855
Post the actual and complete Xorg logs.

i will compare it on two systems

It'll unlikely differ.
Assuming there's some different code path at fault, it'll likely be triggered by the HW version and you cannot see what the default values actually resolve to on the specific HW.
Your best shot then would be https://drm.pages.freedesktop.org/intel … bugfs.html

Are the different monitors all connected with the same connector type (DP/HDMI) and using the same cable?

Edit: that's btw. not a CVT12 modeline.

Last edited by seth (2024-03-04 07:49:41)

sobersu · 2024-04-06 08:15:16

Sorry for long response, work

Today i did full upgrade, connected monitor to capture logs and... it works now via displayport without any problem at 2k@75hz.

Last edited by sobersu (2024-04-06 16:02:06)

seth · 2024-04-06 15:08:49

\o/
Please always remember to mark resolved threads by editing your initial posts subject - so others will know that there's no task left, but maybe a solution to find.
Thanks.

Arch Linux

#1 2024-03-03 22:05:01

[SOLVED][GPU] No signal with integrated intel & 2k monitor

#2 2024-03-03 22:51:38

Re: [SOLVED][GPU] No signal with integrated intel & 2k monitor

#3 2024-03-03 23:55:46

Re: [SOLVED][GPU] No signal with integrated intel & 2k monitor

#4 2024-03-04 07:49:11

Re: [SOLVED][GPU] No signal with integrated intel & 2k monitor

#5 2024-04-06 08:15:16

Re: [SOLVED][GPU] No signal with integrated intel & 2k monitor

#6 2024-04-06 15:08:49

Re: [SOLVED][GPU] No signal with integrated intel & 2k monitor

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