Created attachment 137012 [details] copy of /sys/class/drm/card0/error I'm running the top-of-tree Linux kernel; revision 1f07476ec143bbed7bf0b641749783b1094b4c4f The X server randomly hangs; I can't work out what triggers the problem. I'm not doing anything graphics intensive --- just emacs and xterms. This can happen anywhere from a few minutes after boot to after several hours; but I haven't had a full day's work without a hang for a couple of weeks. The bug is in a Dell laptop, that uses vga_switcheroo to swap between the i915 and an AMD R9 M295X. dmesg output: GPU HANG: ecode 9:0:0x85dffffb, in Xorg [2752], reason: Hang on rcs0, action: reset [ 1798.822701] [drm] GPU hangs can indicate a bug anywhere in the entire gfx sta ck, including userspace. [ 1798.822702] [drm] Please file a _new_ bug report on bugs.freedesktop.org agai nst DRI -> DRM/Intel [ 1798.822702] [drm] drm/i915 developers can then reassign to the right componen t if it's not a kernel issue. [ 1798.822703] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it. [ 1798.822704] [drm] GPU crash dump saved to /sys/class/drm/card0/error [ 1798.822708] i915 0000:00:02.0: Resetting rcs0 after gpu hang [ 1806.782831] i915 0000:00:02.0: Resetting rcs0 after gpu hang [ 1814.846833] i915 0000:00:02.0: Resetting rcs0 after gpu hang [ 1822.846846] i915 0000:00:02.0: Resetting rcs0 after gpu hang [ 1830.814860] i915 0000:00:02.0: Resetting rcs0 after gpu hang [ 1833.878873] [drm] Reducing the compressed framebuffer size. This may lead to less power savings than a non-reduced-size. Try to increase stolen memory size if available in BIOS.
Hi, which mesa version are you using? Thank you.
The problem seems to have gone away on its own, with regular kernel updates. Mesa is the Debian unstable packaged version: libegl-mesa0:amd64 17.3.6-1
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