On Sun, Mar 02, 2025 at 08:08:28PM GMT, Marcus Glocker wrote:
> On Sun, Mar 02, 2025 at 02:58:20PM GMT, Jonathan Gray wrote:
>
> > On Sat, Mar 01, 2025 at 06:43:17PM +0100, Marcus Glocker wrote:
> > > >Synopsis: ThinkPad X1 screen turns occasionally black
> > > >Category: video inteldrm
> > > >Environment:
> > > System : OpenBSD 7.6
> > > Details : OpenBSD 7.6-current (GENERIC.MP) #14: Sat Mar 1 14:53:36
> > > CET 2025
> > > [email protected]:/sys/arch/amd64/compile/GENERIC.MP
> > >
> > > Architecture: OpenBSD.amd64
> > > Machine : amd64
> > > >Description:
> > > In X11, the screen of my ThinkPad X1 will occasionally turn black.
> > > The only way to recover, is to switch to console, and back to X11.
> > > After that, follwing lines are printed on the console:
> > >
> > > drm_gem_plane_helper_prepare_fb: explicit fence not handled
> > > drm_gem_plane_helper_prepare_fb: explicit fence not handled
> >
> > what are you running in X when this happens?
>
> Basically not much. I run WindowMaker with some docker apps, two
> xterms, and xconsole. The issue so far appeared when the machine
> was idle. First I thought the issue is triggered by the hardware
> screen saver, but that got activated a few times today, and the issue
> didn't re-appear yet.
>
> I have currently no idea how to trigger the issue, since it appears
> very intermittently. For example, today the machine was used the
> entire day, with some long idle periods in between, and the issue
> didn't re-appear yet.
>
> > try this:
>
> Thanks for the diff. But based on my above explanation it's pretty
> hard to find out whether the diff makes a difference. Maybe I can find
> out a pattern over time.
Just for the notes, since it just happened again; The system was idle
when it happened for like 2h. Then pressed a key to remove the hardware
screen safer, screen remained black. Switched to console 1, there was
no new message there. Switched back to X on F5, console message
appeared:
drm_gem_plane_helper_prepare_fb: explicit fence not handled
drm_gem_plane_helper_prepare_fb: explicit fence not handled
Maybe I just apply your diff, and see if still happens within the next
few days/weeks.
