** Changed in: mesa (Ubuntu Utopic)
Assignee: (unassigned) => Maarten Lankhorst (mlankhorst)
** Changed in: mesa (Ubuntu Utopic)
Importance: Undecided => Critical
** Changed in: mesa (Ubuntu Utopic)
Importance: Critical => High
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https://bugs.launchpad.net/bugs/1384289
Title:
mesa 10.3.1 required for mir
Status in “mesa” package in Ubuntu:
Fix Released
Status in “mesa” source package in Utopic:
New
Bug description:
There is a bugfix in 10.3.1 that will fix dma-buf handling in i915. So
we would like to see the newest minor release of mesa, which is 10.3.1
This will fix:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1275398 and
basically enable i915 devices to run mir.
[Impact]
* The bug leads to crashes in unity8 on i915 and to crashes or 'black
buffers' on mir clients.
* This is not a request for back porting but a request to pick the
next minor bugfix release of mesa.
[Test Case]
* Install mir-demos on a intel atom netbook or a pentium d system
* sudo mir_demo_server_basic --vt 2 --file /tmp/mir_socket
* sudo chmod 666 /tmp/mir_socket
* mir_demo_client_egltriangle -m /tmp/mir_socket
* then vt switch to vt 1
Expected: Animation
Observed: Crashing or just showing a black buffer
[Regression Potential]
* Instead of immediately crashing unity8s desktop session it will
make the primary client of unity8: unity8-dash fail to start due to
insufficient GL support on the mesa driver - but that is a different
error.
* 10.3.1 introduces the bespoke i915 bug fix, and further driver local fixes
to nouveau for the kepler ir, shutdown leak fixes for radeon and a division by
zero fix for llvmpipe. A fix to glsl that first manifested in i965. Apart from
that build system cleanups for building mesa for android and detecting LLVM.
* the fix to glsl has impact on i965
* fixes for intel are local to i915 and will not cause regression
* fixes to radeon should only touch shutdown code
* fixes to nouveau should be local to kepler gpus
[Other Info]
* The switch to this mesa release will not enable mir. But it will
not enable unity8 on pentium D and atom, but it will be a step towards
that
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