[Bug 94725] Nouveau driver fails to poweron GPU on GM204 after dynamic poweroff - bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ

From: bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org
To: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
Subject: [Bug 94725] Nouveau driver fails to poweron GPU on GM204 after dynamic poweroff
Date: Fri, 01 Apr 2016 03:13:31 +0000	[thread overview]
Message-ID: <bug-94725-8800-FDkJG3SfRM@http.bugs.freedesktop.org/> (raw)
In-Reply-To: <bug-94725-8800-V0hAGp6uBxMKqLRl/0Ahz6D7qz1kEfGD2LY78lusg7I@public.gmane.org/>

[-- Attachment #1.1: Type: text/plain, Size: 1122 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=94725

--- Comment #6 from Alexandre Courbot <gnurou-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
Maybe these messages are pointing to the root of the problem:

[   51.608479] nouveau 0000:01:00.0: Refused to change power state, currently
in D3
[   51.683924] nouveau 0000:01:00.0: Refused to change power state, currently
in D3
[   51.700020] nouveau 0000:01:00.0: Refused to change power state, currently
in D3

If the device is still in D3 when we resume it, then accessing registers would
understandably result in a freeze. Devinit comes early enough in the resume
chain to make this plausible.

FWIW I can successfully suspend/resume (echo mem >/sys/power/state) a GTX 960,
but runtime PM works slightly differently.

I would like to enable runtime PM on my desktop GTX960 to repro this, but for
some reason I am failing - despite loading nouveau with "modeset=2 runpm=1", I
cannot see runtime PM kicking in and /sys/class/drm/card0/power/runtime_status
says "unsupported". What am I doing wrong?

-- 
You are receiving this mail because:
You are the assignee for the bug.

[-- Attachment #1.2: Type: text/html, Size: 1918 bytes --]

[-- Attachment #2: Type: text/plain, Size: 154 bytes --]

_______________________________________________
Nouveau mailing list
Nouveau@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/nouveau