Taihsiang has shown that, thanks to the new ubuntu-drivers-common, it is now possible to use the nvidia driver in an Optimus system even when bbswitch is not available. This was the point of the SRU.
** Tags removed: verification-needed ** Tags added: verification-done -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to nvidia-settings in Ubuntu. 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-settings/+bug/1349282/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp