I believe this is the same as https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1853044 and possibly https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1856653.
lp:1853044 has test kernels for both 5.3 (https://people.canonical.com/~sforshee/lp1853044/5.3.0-40.32+lp1853044v202002131655/) and 5.4 (https://kernel.ubuntu.com/~arighi/LP-1853044/) containing a patch to fix this. I tried the 5.3 test kernel and powertop is now showing RC6 usage > 90% when my desktop is idle. If this solves the problem for you, I'll duplicate this to lp:1853044. -- 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/1863489 Title: intel grafic i915 driver no power saving states rc6 Status in linux package in Ubuntu: Incomplete Bug description: It seems that the i915 intel graphic driver in newer kernels (observed with 5.3) doesn't support energy saving. How do I know that? Using powertop shows in idle tab the GPU - and this shows only : GPU power on 100% - no rc6 or deeper states are used. For some strange reason also the packet (summery?) shows in all states 0%, although I can observe the individual CPU cores are in different power states. The previous parameter enable_rc6 is not existing anymore. The other possible energy saving parameter enable_dc (if set to 1 or 2) results in log with: setting dangerous option enable_dc - tainting kernel. Any idea what might go wrong there? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1863489/+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
