On Fri, Jun 12, 2015 at 21:03:34 +0200, Julius Plenz wrote: > Package: xserver-xorg-video-intel > Version: 2:2.99.917-1 > Severity: important > > Hi, > > How to reproduce: Suspend the machine (e.g. by running "systemctl > suspend"). When the system is woken up again, the graphics display is > stuck for about 5 seconds, and any subsequent redraws of urxvt windows > is completely garbled, GTK applications are just filled rectangles of > gray or black. > > I’m using the "intel" X driver with the (default) SNA accelleration > method. Switching to UXA instead fixes the garbled graphics problem, > but after a suspend/wakeup cycle, accelleration is not working at all > any more, so this is not a real fix. > > The important part from the Kernel log: > > [18964.460761] [drm] stuck on render ring > [18964.462418] [drm] GPU HANG: ecode 0:0x01dff88b, in Xorg [18341], > reason: Ring hung, action: reset > [18966.462759] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off > > There is an easy workaround I discovered while playing around. As soon > as you run "glxgears" for a few seconds and quit it, then possibly > switch workspaces to force a complete screen redraw, all corruptions > are gone and don’t return until the next suspend. If you suspend while > "glxgears" is running, no GPU hang and no screen corruption occurs. > > I’m running Debian unstable on a Thinkpad X1 Carbon (3rd gen, model > 20BS). > Does this also happen with a newer kernel? If yes, please file this upstream per https://01.org/linuxgraphics/documentation/how-report-bugs
Thanks, Julien
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