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<b><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [KBL] igt@gem_ctx_switch@ blt-interruptible GuC 9.14 triggers GEM_BUG_ON(!i915_gem_request_completed(request));"
href="https://bugs.freedesktop.org/show_bug.cgi?id=101642#c8">Comment # 8</a>
on <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [KBL] igt@gem_ctx_switch@ blt-interruptible GuC 9.14 triggers GEM_BUG_ON(!i915_gem_request_completed(request));"
href="https://bugs.freedesktop.org/show_bug.cgi?id=101642">bug 101642</a>
from <span class="vcard"><a class="email" href="mailto:john.a.spotswood@intel.com" title="John Spotswood <john.a.spotswood@intel.com>"> <span class="fn">John Spotswood</span></a>
</span></b>
<pre>So far, I have been unable to reproduce this issue. I have executed the test
as specified in the initial comment:
while ./gem_ctx_switch --r blt-interruptible ; do date ; done
The loop has been running for over 24 hours, and I have not seen a failure. I
am running on a KBL system; however, the device differs slightly:
00:02.0 8086:5917 (rev 07)
I am running with the 9.14 version of the Guc FW and the latest kernel version
from drm-intel-next-queued. It's unclear from this entry what kernel version
exhibited the failure, but I could try a version based on the date of when this
issue was submitted.
I am also seeing the dmesg error:
[drm:guc_read_update_log_buffer] *ERROR* no sub-buffer to capture logs
I need to investigate that further.</pre>
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