[Bug 88430] New: [i915] from 3.18: 3D Acceleration fails for Intel Ironlake M graphics hardware
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Wed Jan 14 17:00:09 PST 2015
https://bugs.freedesktop.org/show_bug.cgi?id=88430
Bug ID: 88430
Summary: [i915] from 3.18: 3D Acceleration fails for Intel
Ironlake M graphics hardware
Product: DRI
Version: unspecified
Hardware: Other
OS: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: DRM/Intel
Assignee: intel-gfx-bugs at lists.freedesktop.org
Reporter: vivek at collabora.co.uk
QA Contact: intel-gfx-bugs at lists.freedesktop.org
CC: intel-gfx-bugs at lists.freedesktop.org
While working on the latest i915 backport for
https://01.org/linuxgraphics/ (porting the i915 module from 3.18
to the ubuntu utopic kernel) we may have found a problem with the
Ironlake M support:
The symptom is that on the affected hardware we get no 3D
acceleration... in fact something like glxgears or one of the GL
screensavers simply displays a static image.
On our test machine we see this in the xorg log:
[27.437] (II) GLX: Initialized DRI2 GL provider for screen 0
[27.445] (EE) intel(0): Failed to submit rendering commands,
disabling acceleration.
which appears to be from:
./src/sna/kgem.c:3662:
"Failed to submit rendering commands, disabling acceleration.\n");
Tracking that back, it looks like a call to do_execbuf is failing.
With drm.debug=0x3, we see this interesting difference in the syslog:
On both kernels:
kernel: [] [drm:drm_ioctl] pid=1550, dev=0xe200, auth=1, I915_GEM_EXECBUFFER2
kernel: [] [drm:i915_gem_execbuffer2] copy 1 exec entries failed 56
kernel: [] [drm:drm_ioctl] ret = -14
Then a little later on the _working_ kernel only:
kernel: [] [drm:drm_ioctl] pid=1550, dev=0xe200, auth=1,
DRM_IOCTL_SET_CLIENT_CAP
kernel: [] [drm:drm_ioctl] ret = -22
A little later, on the working kernel:
kernel: [] [drm:drm_ioctl] pid=1550, dev=0xe200, auth=1, I915_GEM_EXECBUFFER2
kernel: [] [drm:drm_ioctl] pid=1550, dev=0xe200, auth=1, DRM_IOCTL_GEM_CLOSE
Compared to the one that doesn't work:
kernel: [] [drm:drm_ioctl] pid=1550, dev=0xe200, auth=1, I915_GEM_EXECBUFFER2
kernel: [] [drm:drm_ioctl] ret = -16
kernel: [] [drm:drm_ioctl] pid=1550, dev=0xe200, auth=1, I915_GEM_THROTTLE
kernel: [] [drm:drm_ioctl] pid=1550, dev=0xe200, auth=1, DRM_IOCTL_GEM_CLOSE
Which I believe corresponds to the failure that the xorg log is
complaining about.
We're going to build a vanilla 3.18 kernel and test it on the hardware
in question, but the backport was pretty uninvasive, and didn't touch
any hardware specific code paths that I can see, which is why we think
it might be a regression in the Ironlake M support.
I'll add more info once we've confirmed whether or not it occurs on
a 3.18 kernel on this hardware.
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