With this kernel 5.8.0-35-generic #37~lp1907212+2 nvidia gpu is successfully powered down, and idle power consumption was normal at 5-6 watt.
$ cat /sys/bus/pci/devices/0000:01:00.1/power/runtime_status suspended $ cat /sys/bus/pci/devices/0000:01:00.1/power/control auto On dmesg output there are a lot more `snd_hda_intel 0000:01:00.1: can't change power state from D3cold to D0 (config space inaccessible)` complaints. I also rebooted at nvidia performance mode, everything is normal but `0000:01:00.1/power/runtime_status` is again suspended. I don't know if it is supposed to be like this but with 5.8.0-31-generic when booting with nvidia performance mode, `0000:01:00.1/power/runtime_status` is active. ** Attachment added: "dmesg_5.8.0-35~lp1907212+2.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1907212/+attachment/5443236/+files/dmesg_5.8.0-35~lp1907212+2.txt -- 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: In Progress 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
