> -----Original Message----- > From: Intel-gfx <intel-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of Jani > Nikula > Sent: torstai 14. huhtikuuta 2022 11.32 > To: François Valenduc <francoisvalenduc@xxxxxxxxx>; Lisovskiy, Stanislav > <stanislav.lisovskiy@xxxxxxxxx> > Cc: intel-gfx@xxxxxxxxxxxxxxxxxxxxx; dri-devel@xxxxxxxxxxxxxxxxxxxxx > Subject: Re: commit 15512021eb3975a8c2366e3883337e252bb0eee5 > causes white spots in console screens > > On Thu, 14 Apr 2022, François Valenduc <francoisvalenduc@xxxxxxxxx> 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@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-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
