[Bug 1778011] Re: SRU: PRIME Power Saving mode draws too much power
After spending some more time with this, I can confirm that this is definitely a regression. Both nouveau and the old bbswitch based method in 16.04 were able to power off the nvidia card successfully when not in use. The current implementation of prime-select in 18.04 doesn't do that. It may be that this is card or ACPI specific, but my hardware is fairly old (2012 ivybridge with kepler GPU), and it doesn't work for it. -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gdm3 in Ubuntu. https://bugs.launchpad.net/bugs/1778011 Title: SRU: PRIME Power Saving mode draws too much power To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1778011/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
[Bug 1778011] Re: SRU: PRIME Power Saving mode draws too much power
@Alberto, with prime-select intel as well as with bbswitch off, powertop shows the nvidia tunable as "good". Still, the battery's discharge rate on idle remains pretty high (around 20W) on prime-select intel. With bbswitch off, it drops to 13W or thereabouts. Do you need any more information ? -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gdm3 in Ubuntu. https://bugs.launchpad.net/bugs/1778011 Title: SRU: PRIME Power Saving mode draws too much power To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1778011/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
[Bug 1778011] Re: SRU: PRIME Power Saving mode draws too much power
Attached powertop images. I'm not sure how accurate powertop's values and distributions are. With prime-select intel, the total estimated power remains high although it doesn't attribute it to nvidia. bbswitch also stays on. I've also attached a bbswitch off capture after prime- select intel. That actually seems to turn the gpu off. There's also a default capture with nouveau drivers (i.e., the nvidia gpu is not in use). There are a few other issues with prime-selct too. prime-select intel glitches the lightdm login screen. You can't see the text entry field. prime-query is also not accurate always. Sometimes it says it's nvidia, but nvidia drivers are not loaded. ** Attachment added: "powertop.zip" https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1778011/+attachment/5228576/+files/powertop.zip -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gdm3 in Ubuntu. https://bugs.launchpad.net/bugs/1778011 Title: SRU: PRIME Power Saving mode draws too much power To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1778011/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
[Bug 1778011] Re: SRU: PRIME Power Saving mode draws too much power
Thinkpad w530. Still looks like the nvidia gpu isn't turning off. bionic+lightdm+unity7. Log attached. prime-select query intel cat /proc/acpi/bbswitch :01:00.0 ON ** Attachment added: "gpu-manager.log" https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1778011/+attachment/5226056/+files/gpu-manager.log -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gdm3 in Ubuntu. https://bugs.launchpad.net/bugs/1778011 Title: SRU: PRIME Power Saving mode draws too much power To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1778011/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
