https://bugzilla.suse.com/show_bug.cgi?id=1183294 https://bugzilla.suse.com/show_bug.cgi?id=1183294#c1 --- Comment #1 from Santiago Zarate --- Created attachment 847010 --> https://bugzilla.suse.com/attachment.cgi?id=847010&action=edit Fresh boot kernel log The problem starts happening as soon as the plymouth prompt for password shows up (Monitors are turned off, and remain like that through the session). Switching ttys doesn't change anything -- You are receiving this mail because: You are the assignee for the bug.

https://bugzilla.suse.com/show_bug.cgi?id=1183294 https://bugzilla.suse.com/show_bug.cgi?id=1183294#c3 Takashi Iwai changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |tiwai@suse.com --- Comment #3 from Takashi Iwai --- The gitlab issue 224 looks somehow inconsistent: some people reported that 5.11 solved the problem while some people reported they still have the problem, and in your case, it appeared at first on 5.11.x. Hmm. Could you run with drm.debug=0x1e boot option and get the dmesg output? I don't think it points out the exact culprit, but this information is needed in anyway for further debugging. -- You are receiving this mail because: You are the assignee for the bug.

https://bugzilla.suse.com/show_bug.cgi?id=1183294 https://bugzilla.suse.com/show_bug.cgi?id=1183294#c5 --- Comment #5 from Santiago Zarate --- Created attachment 847027 --> https://bugzilla.suse.com/attachment.cgi?id=847027&action=edit kernel 5.11 -- You are receiving this mail because: You are the assignee for the bug.

https://bugzilla.suse.com/show_bug.cgi?id=1183294 https://bugzilla.suse.com/show_bug.cgi?id=1183294#c7 --- Comment #7 from Takashi Iwai --- OK, then could you give the log from the working kernel (5.10.16) with drm.debug option, too? -- You are receiving this mail because: You are the assignee for the bug.

https://bugzilla.suse.com/show_bug.cgi?id=1183294 https://bugzilla.suse.com/show_bug.cgi?id=1183294#c9 --- Comment #9 from Takashi Iwai --- Thanks. Now I'm building a test kernel with the reverts of two commits as a blind shot. It's being built in OBS home:tiwai:bsc1183294 repo. Could you give it a try later? -- You are receiving this mail because: You are the assignee for the bug.

https://bugzilla.suse.com/show_bug.cgi?id=1183294 https://bugzilla.suse.com/show_bug.cgi?id=1183294#c12 --- Comment #12 from Santiago Zarate --- (In reply to Takashi Iwai from comment #11)

The package build failed due to some issue in OBS, unfortunately. Triggered rebuild. Let's see...

waiting :) -- You are receiving this mail because: You are the assignee for the bug.

https://bugzilla.suse.com/show_bug.cgi?id=1183294 https://bugzilla.suse.com/show_bug.cgi?id=1183294#c14 --- Comment #14 from Takashi Iwai --- OK, then the regression was introduced by them. FWIW, the reverted commits are: b30edfd8d0b4b22f9c17c208064b39a3d93e6971 drm/i915: Switch to LTTPR non-transparent mode link training 88ebe1f572e284ecfe088648e0ae93803a75a459 drm/i915/dp: Fix LTTPR vswing/pre-emp setting in non-transparent mode Could you open the upstream gitlab Issues and mention those two commits? -- You are receiving this mail because: You are the assignee for the bug.

https://bugzilla.suse.com/show_bug.cgi?id=1183294 https://bugzilla.suse.com/show_bug.cgi?id=1183294#c16 --- Comment #16 from Santiago Zarate --- (In reply to Takashi Iwai from comment #14)

OK, then the regression was introduced by them.

FWIW, the reverted commits are: b30edfd8d0b4b22f9c17c208064b39a3d93e6971 drm/i915: Switch to LTTPR non-transparent mode link training 88ebe1f572e284ecfe088648e0ae93803a75a459 drm/i915/dp: Fix LTTPR vswing/pre-emp setting in non-transparent mode

Could you open the upstream gitlab Issues and mention those two commits?

There are few reports opened * https://gitlab.freedesktop.org/drm/intel/-/issues/3166 * https://gitlab.freedesktop.org/drm/intel/-/issues/3173 * https://gitlab.freedesktop.org/drm/intel/-/issues/2737 I'll add my report to 3166. -- You are receiving this mail because: You are the assignee for the bug.

https://bugzilla.suse.com/show_bug.cgi?id=1183294 https://bugzilla.suse.com/show_bug.cgi?id=1183294#c18 --- Comment #18 from Santiago Zarate --- Created attachment 847250 --> https://bugzilla.suse.com/attachment.cgi?id=847250&action=edit 5.11.6-1.ga9de9ab-default boot log Booted on the first shot! (Log attached with drm.debug=0x1e) -- You are receiving this mail because: You are the assignee for the bug.

https://bugzilla.suse.com/show_bug.cgi?id=1183294 https://bugzilla.suse.com/show_bug.cgi?id=1183294#c20 Santiago Zarate changed: What |Removed |Added ---------------------------------------------------------------------------- Flags|needinfo?(santiago.zarate@s | |use.com) | --- Comment #20 from Santiago Zarate --- (In reply to Takashi Iwai from comment #19)

Yet another test kernel is being built in OBS home:tiwai:bsc1183294-3 from the latest patch from Imre (that was submitted to the upstream ML). Please check it later.

Meanwhile I submitted this to stable branch for the TW kernel, too.

I'm running it atm, everything seems to work as expected, thanks! -- You are receiving this mail because: You are the assignee for the bug.

https://bugzilla.suse.com/show_bug.cgi?id=1183294 https://bugzilla.suse.com/show_bug.cgi?id=1183294#c22 Santiago Zarate changed: What |Removed |Added ---------------------------------------------------------------------------- Flags| |needinfo?(tiwai@suse.com) --- Comment #22 from Santiago Zarate --- Created attachment 847731 --> https://bugzilla.suse.com/attachment.cgi?id=847731&action=edit kernel 5.11.6-1 So, this one is back, installing 5.11.6-1.g424e43f from your branch again allowed me to have working screens again. Takashi do you see any reasons for the regression other than possibly the patch not applying? -- You are receiving this mail because: You are the assignee for the bug.

https://bugzilla.suse.com/show_bug.cgi?id=1183294 https://bugzilla.suse.com/show_bug.cgi?id=1183294#c24 Takashi Iwai changed: What |Removed |Added ---------------------------------------------------------------------------- Status|REOPENED |RESOLVED Resolution|--- |FIXED Flags|needinfo?(tiwai@suse.com) | --- Comment #24 from Takashi Iwai --- 5.11.6-1.* is an older kernel that doesn't contain the backport. The kernel package got rebuilt from the same source by some reason (likely some dependency changes). The next kernel should contain the fix. Or just use the latest kernel in OBS Kernel:stable repo instead. -- You are receiving this mail because: You are the assignee for the bug.