Created attachment 136079 [details] data from /sys/class/drm/card0/error I was testing a qt-based app. The UI froze for several seconds, then resumed without an issue. In dmesg, I've found the following: [958940.926878] [drm] stuck on render ring [958940.927417] [drm] GPU HANG: ecode 7:0:0x87dd7d10, in app [17354], reason: Ring hung, action: reset [958940.927418] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace. [958940.927419] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel [958940.927419] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue. [958940.927420] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it. [958940.927420] [drm] GPU crash dump saved to /sys/class/drm/card0/error [958940.965440] drm/i915: Resetting chip after gpu hang Distribution: Ubuntu 16.04.3 LTS Kernel: 4.4.0-101-generic #124-Ubuntu SMP x86_64 X.Org X Server 1.18.4 Some version information from glxinfo: Vendor: Intel Open Source Technology Center (0x8086) Device: Mesa DRI Intel(R) Haswell Desktop (0x412) Version: 17.0.7 GPU: Integrated into CPU, Intel(R) Core(TM) i3-4330 CPU
Hello Andrzej, Any special reason to stay with 16.04? Do you have any steps to trigger the hang again? If possible could you try with a newer kernel version, 4.13 or up? Could you please try Xorg 1.19 and Mesa 17.3? Thank you.
It's a work computer, I'm staying with 16.04 because "it works" and updating usually introduces unnecessary problems. Anyway, this bug has occurred only once. I doubt that I would have any luck attempting to reproduce it. I have one guess - could this "Ring hung" be simply a result of the GPU having a large workload spike? I haven't verified this, but the app that I was testing could have tried to render an excessive amount of geometry during one frame.
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