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* [Bug 108058] New: After resuming from suspend, discrete GPU is powered on and can't be turned off
@ 2018-09-25 12:15 bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ
       [not found] ` <bug-108058-8800-V0hAGp6uBxMKqLRl/0Ahz6D7qz1kEfGD2LY78lusg7I@public.gmane.org/>
  0 siblings, 1 reply; 9+ messages in thread
From: bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ @ 2018-09-25 12:15 UTC (permalink / raw)
  To: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW


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https://bugs.freedesktop.org/show_bug.cgi?id=108058

            Bug ID: 108058
           Summary: After resuming from suspend, discrete GPU is powered
                    on and can't be turned off
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
          Reporter: domenico.iezzi.201-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
        QA Contact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org

Created attachment 141734
  --> https://bugs.freedesktop.org/attachment.cgi?id=141734&action=edit
kernel log

Overall, nouveau works without problem in managing discrete GPU PM, and if I
check power consumption using powertop on a fresh boot it reports an average
battery discharge rate of ~7W like always.
After I resume the laptop from suspend, /sys/kernel/debug/vgaswitcheroo/switch
reports that the device is
dynamically turned off:

0:IGD:+:Pwr:0000:00:02.0
1:DIS: :DynOff:0000:01:00.0

But if I check with powertop, I get a battery discharge rate of ~11W. To better
identify the problem, I tried using bumbleebee+bbswitch+nvidia-driver and see
what bbswitch module reports. On a fresh boot, it works
ok as the nouveau driver, but after resuming from suspend
/proc/acpi/bbswitch reports that the card is turned ON, and there is no way to
power it off:

[root@example user]# cat /proc/acpi/bbswitch 
0000:04:00.0 ON
[root@example user]# tee /proc/acpi/bbswitch <<<OFF
OFF
[root@example user]# cat /proc/acpi/bbswitch 
0000:04:00.0 ON

I attached the kernel log using following parameters when using only nouveau
driver (no bumblebee/bbswitch/nvidia): log_buf_len=1M nouveau.debug=debug.

System specs:
Asus Vivobook S551LN
Intel i7 4500U
NVIDIA 840M
Archlinux 4.18.9-arch1-1-ARCH (but affecting older versions, since early 4.x
version when i started using linux)

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^ permalink raw reply	[flat|nested] 9+ messages in thread
end of thread, other threads:[~2019-12-04  9:45 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2018-09-25 12:15 [Bug 108058] New: After resuming from suspend, discrete GPU is powered on and can't be turned off bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ
     [not found] ` <bug-108058-8800-V0hAGp6uBxMKqLRl/0Ahz6D7qz1kEfGD2LY78lusg7I@public.gmane.org/>
2018-11-22 14:31   ` [Bug 108058] " bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ
2018-11-22 20:25   ` bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ
2018-11-22 20:25   ` bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ
2018-11-22 20:26   ` bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ
2018-11-22 20:26   ` bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ
2019-02-08  2:03   ` bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ
2019-03-17 17:05   ` bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ
2019-12-04  9:45   ` bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ

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