-----Original Message----- From: Intel-gfx intel-gfx-bounces@lists.freedesktop.org On Behalf Of Jani Nikula Sent: torstai 14. huhtikuuta 2022 11.32 To: François Valenduc francoisvalenduc@gmail.com; Lisovskiy, Stanislav stanislav.lisovskiy@intel.com Cc: intel-gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org Subject: Re: [Intel-gfx] commit 15512021eb3975a8c2366e3883337e252bb0eee5 causes white spots in console screens
On Thu, 14 Apr 2022, François Valenduc francoisvalenduc@gmail.com wrote:
Le 14/04/22 à 10:03, Lisovskiy, Stanislav a écrit :
On Thu, Apr 14, 2022 at 08:33:35AM +0200, François Valenduc wrote:
Le 14/04/22 à 08:31, Lisovskiy, Stanislav a écrit :
On Wed, Apr 13, 2022 at 08:12:20PM +0300, Jani Nikula wrote:
On Wed, 13 Apr 2022, François Valenduc francoisvalenduc@gmail.com
wrote:
> Commit 15512021eb3975a8c2366e3883337e252bb0eee5 > (15512021eb3975a8c2366e3883337e252bb0eee5) causes a lof of white > spots to appears on the right upper corner of all console screens > (see
https://drive.google.com/file/d/13GabEvOIKSAj5yox6ybAZEDu3Ixncw5Q/view).
> git-bisect shows that this is the offending commit and if I > revert it, the problem goes away. The problem still occurs with > kernel 5.18-rc2 and to all stable trees where it was applied. > Can somebody explains what happens ? > > The video card is the following: VGA compatible controller: Intel > Corporation WhiskeyLake-U GT2 [UHD Graphics 620] (rev 02) > (prog-if 00 [VGA controller]) > > Please tell me if you need more info. That's commit 15512021eb39 ("drm/i915: Workaround broken BIOS DBUF configuration on TGL/RKL"), adding Cc's.
Please file a report at fdo gitlab [1] and attach dmesg etc. there.
That commit looks like it is just disabling all the planes, if wrong dbuf/wm configuration is detected. However it should do that only once during boot as I understand.
Are you sure that is exactly this commit which is causing this? Does the issue appear always?
Ville Syrjälä, thoughts?
Stan
Thanks, Jani.
[1] https://gitlab.freedesktop.org/drm/intel/wikis/How-to-file-i915-bu gs
-- Jani Nikula, Intel Open Source Graphics Center
As I said, git-bisect shows it's the offending commit and if I revert it, the problem doesn't happens. Otherwise, it always occurs.
François
Does it just happen all the time or some steps/certain circumstances needed for it to happen?
Only suspicion after looking briefly is that once suspend/resume is done it might be messing something up. Just a quick guess..
Stan
It occurs permantently as soon as I boot my computer.
I'd appreciate that bug being filed, and the discussion moved there, so all the details and history are in one place.
Agree.
Thanks, Jani.
-- Jani Nikula, Intel Open Source Graphics Center