[Bug 86281] brw_meta_fast_clear (brw=brw at entry=0x7fffd4097a08, fb=fb at entry=0x7fffd40fa900, buffers=buffers at entry=2, partial_clear=partial_clear at entry=false)

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Tue Jul 28 02:01:39 PDT 2015


Samuel Iglesias <siglesias at igalia.com> changed:

           What    |Removed                     |Added
                 CC|                            |siglesias at igalia.com

--- Comment #19 from Samuel Iglesias <siglesias at igalia.com> ---
I reproduced this bug on my SNB laptop and Mesa master (HEAD 7850774). I found
that just before crashing at brw_meta_fast_clear.c:451, it prints out the
following error:

  Failed to open BO for returned DRI2 buffer (1600x900, dri2 back buffer, named
  This is likely a bug in the X Server that will lead to a crash soon.

Which is printed at intel_process_dri2_buffer() when
drm_intel_bo_gem_create_from_name() returns a NULL pointer. I added some traces
to that function at libdrm and found that drmIoctl(bufmgr_gem->fd,
DRM_IOCTL_GEM_OPEN, &open_arg) is returning an error, so this bug seems to be
produced by the kernel driver.

My distro is Debian Jessie with a Linux kernel 3.14.

Hope this helps.

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