[Bug 95023] New: After kexec in console: GPU HANG: ecode 7:0:0x87c3ffff, reason: Ring hung, action: reset

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95023

            Bug ID: 95023
           Summary: After kexec in console: GPU HANG: ecode
                    7:0:0x87c3ffff, reason: Ring hung, action: reset
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: dephlector at yahoo.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 123062
  --> https://bugs.freedesktop.org/attachment.cgi?id=123062&action=edit
GPU crash dump

Hello, I am filing a new bug, because all the similar bugs I found were
reproduced while running Xorg and/or chromium. I run linux in a console mode
only (KMS).

I am running linux kernel 4.4.6. It starts normally, without any warnings.
After that I am doing a kexec into another 4.4.6 kernel, configured
differently. This warning appears in dmesg. After the warning, system runs
normally.

here is the relevant information.

1. dmesg:

[    4.741299] [drm] stuck on render ring
[    4.742038] [drm] GPU HANG: ecode 7:0:0x87c3ffff, reason: Ring hung, action:
reset
[    4.742040] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[    4.742041] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[    4.742042] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[    4.742042] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
[    4.742043] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[    4.743293] drm/i915: Resetting chip after gpu hang

2. crash dump - attached

3. config files for the first and second (kexec-ed) kernel - attached

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