On Fri, May 4, 2018 at 6:16 PM, Mike Lothian <m...@fireburn.co.uk> wrote: > Hi Mario > > Thanks for finding this > > Tested-by: Mike Lothian <m...@fireburn.co.uk> >
That tested-by means it doesn't cause new harm, right? Not that it solves the plasmashell or steam freezes on itself? -mario > Cheers > > Mike > > On 4 May 2018 at 14:02, Mario Kleiner <mario.kleiner...@gmail.com> wrote: >> Hi Daniel, Eero, >> >> On Fri, May 4, 2018 at 2:41 PM, Daniel Stone <dan...@fooishbar.org> wrote: >>> Hi Mario, >>> >>> On 4 May 2018 at 13:14, Mario Kleiner <mario.kleiner...@gmail.com> wrote: >>>> Indeed, i found a Mesa bug yesterday which can cause Mesa's >>>> PresentPixmap request to spuriously feed garbage targetMSC's >>>> into the driver under some conditions. However, while other >>>> video drivers seem to cope relatively well with that, modesetting >>>> ddx causes KDE-5's plasmashell to lock up badly quite frequently, >>>> and my suspicion is that the code removed in this commit is one >>>> major source of the extra fragility. >>> >>> Thanks a lot for tracking this down! Adding Eero to Cc, who I think >>> stumbled on this very problem. >> >> You mean the Mesa bug? I'll quickly send out something half finished >> for discussion to mesa-devel, cc'ed to xorg-devel, which "fixes" the >> bug in two different ways, both are not optimal, but better than >> nothing. Lacking this fix, KDE-5 is pretty much unusable due to >> frequent lockup on server 1.20 with the modesetting-ddx atm. >> >> -mario >> >>> >>> Cheers, >>> Daniel >> _______________________________________________ >> xorg-devel@lists.x.org: X.Org development >> Archives: http://lists.x.org/archives/xorg-devel >> Info: https://lists.x.org/mailman/listinfo/xorg-devel _______________________________________________ xorg-devel@lists.x.org: X.Org development Archives: http://lists.x.org/archives/xorg-devel Info: https://lists.x.org/mailman/listinfo/xorg-devel
