** Branch linked: lp:ubuntu/trusty-proposed/ubuntu-drivers-common
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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 Committed
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
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