5.8.0-35-generic #37~lp1907212+4 Nvidia gpu successfully powered down. $ cat /sys/bus/pci/devices/0000:01:00.1/power/runtime_status suspended
The previous snd_hda_intel error messages aren't printed anymore, yet "snd_hda_intel 0000:01:00.1: can't change power state from D3cold to D0 (config space inaccessible)" are printed about 20 times again at boot. ** Attachment added: "dmesg_37~lp1907212+4.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1907212/+attachment/5444175/+files/dmesg_37~lp1907212+4.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
