Hi Mario Thanks for finding this
Tested-by: Mike Lothian <[email protected]> Cheers Mike On 4 May 2018 at 14:02, Mario Kleiner <[email protected]> wrote: > Hi Daniel, Eero, > > On Fri, May 4, 2018 at 2:41 PM, Daniel Stone <[email protected]> wrote: >> Hi Mario, >> >> On 4 May 2018 at 13:14, Mario Kleiner <[email protected]> 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 > _______________________________________________ > [email protected]: X.Org development > Archives: http://lists.x.org/archives/xorg-devel > Info: https://lists.x.org/mailman/listinfo/xorg-devel _______________________________________________ [email protected]: X.Org development Archives: http://lists.x.org/archives/xorg-devel Info: https://lists.x.org/mailman/listinfo/xorg-devel
