It was certainly working with 5.4.0-* from 20.04 at some time, I have been mainly using dGPU for 2-3 months, and wouldn't have noticed any regressions.
Strangely, I tested with 5.4.0-56-generic that remained after the upgrade, and it is also not powering down dGPU. 20.10 didn't upgrade nvidia driver, I currently have 450.80.02 Something important I just noticed, at 19.10 and 20.04 nvidia vga and related audio function devices weren't visible at lspci when booting with intel gpu only, but after upgrading to 20.10 they are visible again when booting with intel gpu. I suspect this mechanism was essential for power management and it has changed with 20.10 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1907212 Title: Power consumption regression after upgrade to 20.10 5.8.0-31-generic Status in linux package in Ubuntu: Incomplete Bug description: After upgrading to Ubuntu 20.10 which ships kernel 5.8.0-31-generic, battery life is considerably less and power consumption is about 10 watts more idle, (idling at 14-15 watts) using integrated graphics. This is a hybrid GPU laptop Intel HD 630/GP107M, and based on past experiences a possible cause is not powering off the dedicated GPU completely while using the integrated. Running sudo powertop --auto-tune doesn't eliminate the issue. $ cat /sys/bus/pci/devices/0000:01:00.0/power/runtime_status suspended $ cat /sys/bus/pci/devices/0000:01:00.0/power/runtime_suspended_time 1815948 $ cat /sys/bus/pci/devices/0000:01:00.1/power/runtime_status active $ cat /sys/bus/pci/devices/0000:01:00.1/power/runtime_suspended_time 3827 Device "01:00.1 Audio device: NVIDIA Corporation GP107GL High Definition Audio Controller" appears active, does this mean that the audio subsystem of dGPU keeps it enabled, causing the 10-watt consumption? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1907212/+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
