This bug was fixed in the package ubuntu-drivers-common - 1:0.2.91.7
---------------
ubuntu-drivers-common (1:0.2.91.7) trusty-proposed; urgency=medium
* gpu-manager.c, gpu-manager.py:
- Add support for testing core alternatives. This will be needed
by fglrx.
- Fix a regression that caused the gpu-manager to switch to mesa
after enabling fglrx on hybrid systems (LP: #1310489). Also
add a test case so that we don't regress in the future.
- Check that either fglrx or nvidia is set in xorg.conf when
xorg.conf is needed.
- Check if kernel modules are blacklisted before choosing the
driver (LP: #1310489).
- Enable only GPUs with open drivers that have connected outputs.
Attaching to GPUs that have no connected outputs would result
in a black screen.
- Allow RandR offloading even without bbswitch (LP: #1349282).
- Fall back to mesa when failing to enable prime.
- Do not try to enable prime if the nvidia driver is older than
331.
- Do not abort if the settings for prime cannot be found.
Try to create the file before failing.
-- Alberto Milone <alberto.mil...@canonical.com> Fri, 29 Aug 2014 11:29:55
+0200
** Changed in: ubuntu-drivers-common (Ubuntu Trusty)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1349282
Title:
The gpu-manager should allow RandR offloading without bbswitch
Status in “nvidia-settings” package in Ubuntu:
Triaged
Status in “ubuntu-drivers-common” package in Ubuntu:
Fix Released
Status in “nvidia-settings” source package in Trusty:
Triaged
Status in “ubuntu-drivers-common” source package in Trusty:
Fix Released
Bug description:
SRU Request
While bbswitch may fail on some hybrid systems (e.g. on the desktop or
when the bbswitch module fails to build), this is not a good reason to
prevent the system from offloading rendering to the NVIDIA GPU.
[Impact]
* This problem makes it impossible to use the NVIDIA GPU on hybrid systems
with Intel+NVIDIA GPUs when bbswitch is not available (i.e. when it fails to
load).
[Test Case]
* Make sure to be using a hybrid system with Intel+NVIDIA GPUs.
* Check that bbswitch is not available. You can do so by posting output of
the following command:
test -e /proc/acpi/bbswitch && echo true || echo false
* Make sure that the gpu-manager is not disabled (only necessary if you
disabled it manually).
* Install ubuntu-drivers-common from trusty-proposed.
* Remove all fglrx and nvidia drivers (keep the nvidia-common and the
nvidia-prime packages):
sudo apt-get --purge remove nvidia-331
sudo apt-get --purge remove nvidia-331
sudo apt-get --purge remove fglrx
sudo apt-get --purge remove fglrx-updates
* Restart the system.
* Install the nvidia binary driver, reboot, and check that the binary driver
is enabled (attach your /var/log/gpu-manager.log)
- Expected: the NVIDIA discrete GPU is enabled.
- Bad behavior: the system switches back to the intel driver and the
discrete GPU is not used, despite the fact that the system was configured
properly.
[Regression Potential]
* Low. Systems that currently work will keep working as usual, the ones that
currently fail should finally work.
[Other Info]
* N/A
-----------
The gpu-manager should allow RandR offloading without bbswitch. This
would allow desktop systems to make use of offloading even when
bbswitch is not supported.
Also, nvidia-settings should not complain in such scenarios. See
https://bugs.launchpad.net/ubuntu/+source/ubuntu-drivers-
common/+bug/1310023/comments/70
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/nvidia-settings/+bug/1349282/+subscriptions
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