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@xxxxxxxxx> 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-bugs > > > > > > > > > -- > > > 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
