** Description changed: - [Steps to reproduce] - 1. Install 20.04.3 with "Third-party packages" on a system which containing a RTD3 supported nvidia card. - 2. After the installation, press enter to reboot system - 3. prime-select query + As per LP: #1942307 we now set on-demand as the default. This however, + causes "prime-select on-demand", called by ubuntu-drivers, not to even + try to detect RTD3 and to enable it, since "on-demand" is already set. - [Expected result] - on-demand + We cannot make informed choices about RTD3 in the postinstallation + script of nvidia-prime, therefore we should simply drop the check that + prime-select makes to abort if the new profile is determined to be the + same as the current profile. - [Actual result] - performance - - --- - - It's because ubiquity launches `ubuntu-drivers install --packages-list - ...` in live system but install each package to target storage. - - When installing nvidia-prime, the preinst set "on" to "/etc/prime- - discrete" which will be referred by gpu-manager. The gpu-manager will - set to performance mode. - - After confirming with Alberto on Mattermost, since we don't have a - nvidia driver which lower than 450 version since focal. - - I think we are ok to switch to on-demand mode. --- [Impact] - * Ubuntu will set GPU mode to performance as default which may use more power - * User can't use GPU for other purpose (eg: deep-learning) if RTD3 is not supported - * According to Nvidia README, the RTD3 doesn't support on non-laptop machine + * Ubuntu will set GPU mode to performance as default which may use more power + * User can't use GPU for other purpose (eg: deep-learning) if RTD3 is not supported + * According to Nvidia README, the RTD3 doesn't support on non-laptop machine [Test Plan] - * Install Ubuntu, and then execute 'ubuntu-drivers install' to install GPU driver. After the installation, reboot the system. Execute "prime-select query" should get "on-demand" - * Old GPU (which supported by nvidia-390 only) will keep in performance mode, refer LP:1957094. Execute "prime-select query" should get "nvidia" - * On non-laptop machine. Can set GPU mode to on-demand - * On laptop with GPU in runtime PM support list. Set GPU mode to on-demand and Nvidia driver is loaded with "NVreg_DynamicPowerManagement=0x02" + * Install Ubuntu, and then execute 'ubuntu-drivers install' to install GPU driver. After the installation, reboot the system. Execute "prime-select query" should get "on-demand" + * Old GPU (which supported by nvidia-390 only) will keep in performance mode, refer LP:1957094. Execute "prime-select query" should get "nvidia" + * On non-laptop machine. Can set GPU mode to on-demand + * On laptop with GPU in runtime PM support list. Set GPU mode to on-demand and Nvidia driver is loaded with "NVreg_DynamicPowerManagement=0x02" [Where problems could occur] - * With GPU supported RTD3 not able enable runtime PM on non-laptop. But + * With GPU supported RTD3 not able enable runtime PM on non-laptop. But based on the Nvidia README, this case shall not happened. [Other Info] Changelogs: nvidia-prime (0.8.16~0.20.04.2) focal; urgency=medium - [ Jeremy Szu ] - * Set on-demand mode as default nvidia mode (LP: #1942307) + [ Jeremy Szu ] + * Set on-demand mode as default nvidia mode (LP: #1942307) - [ Alberto Milone ] - * prime-select: - - Detect chassis type and enable RTD3 only - on laptops (LP: #1942788). - - on-demand mode doesn't need to depend on - RTD3 (LP: #1942789). - - Use bootvga detection when last_gfx_boot - is not available. - - Don't check the current profile when setting - a profile (LP: #1946476). - - Catch BrokenPipeError. - - Use bootvga detection when last_gfx_boot is - not available. - - nvidia-prime (0.8.16.2~0.21.04.1) hirsute; urgency=medium - - [ Jeremy Szu ] - * Set on-demand mode as default nvidia mode (LP: #1942307) - - [ Alberto Milone ] - * prime-select: - - Detect chassis type and enable RTD3 only - on laptops (LP: #1942788). - - on-demand mode doesn't need to depend on - RTD3 (LP: #1942789). - - Use bootvga detection when last_gfx_boot - is not available. - - Don't check the current profile when setting - a profile (LP: #1946476). + [ Alberto Milone ] + * prime-select: + - Detect chassis type and enable RTD3 only + on laptops (LP: #1942788). + - on-demand mode doesn't need to depend on + RTD3 (LP: #1942789). + - Use bootvga detection when last_gfx_boot + is not available. + - Don't check the current profile when setting + a profile (LP: #1946476). + - Catch BrokenPipeError. + - Use bootvga detection when last_gfx_boot is + not available.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1946476 Title: New on-demand default causes RTD3 never to be enabled To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1946476/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
