[Bug 111919] Intel card (Coffeelake) short freezes (hang) after upgrade to kernel 5.3.4

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111919

--- Comment #6 from Stanislav Ochotnicky <freedesktop.org at ochotnicky.com> ---
FWIW, I've dug a bit more in the journal and around the same time I have these
(presumably Chromium) logs:
ERROR:buffer_manager.cc(488)] [.DisplayCompositor]GL ERROR
:GL_INVALID_OPERATION : glBufferData: <- error from previous GL command
ERROR:buffer_manager.cc(488)] [.DisplayCompositor]GL ERROR
:GL_INVALID_OPERATION : glBufferData: <- error from previous GL command
ERROR:buffer_manager.cc(488)] [.DisplayCompositor]GL ERROR
:GL_INVALID_OPERATION : glBufferData: <- error from previous GL command
ERROR:buffer_manager.cc(488)] [.DisplayCompositor]GL ERROR
:GL_INVALID_OPERATION : glBufferData: <- error from previous GL command
ERROR:shared_image_manager.cc(120)] SharedImageManager::ProduceGLTexture:
Trying to produce a representation from a non-existent mailbox.
3E:FB:28:49:D0:7B:96:F0:6F:34:7A:9B:8C:07:C3:09
ERROR:gles2_cmd_decoder.cc(18508)] [.DisplayCompositor]GL ERROR
:GL_INVALID_OPERATION : DoCreateAndTexStorage2DSharedImageINTERNAL: invalid
mailbox name
ERROR:gles2_cmd_decoder.cc(18529)] [.DisplayCompositor]GL ERROR
:GL_INVALID_OPERATION : DoBeginSharedImageAccessCHROMIUM: bound texture is not
a shared image
ERROR:gles2_cmd_decoder.cc(18552)] [.DisplayCompositor]GL ERROR
:GL_INVALID_OPERATION : DoEndSharedImageAccessCHROMIUM: bound texture is not a
shared image
ERROR:gles2_cmd_decoder.cc(18529)] [.DisplayCompositor]GL ERROR
:GL_INVALID_OPERATION : DoBeginSharedImageAccessCHROMIUM: bound texture is not
a shared image


The GL ERRORS repeat for a few seconds until:
ERROR:logger.cc(46)] Too many GL errors, not reporting any more for this
context. use --disable-gl-error-limit to see all errors

I'll continue running with i915.dmc_firmware_path=/dev/null and see if I can
reproduce (so far I haven't been able)

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