[Nouveau] [Bug 39550] Brightness stuck to low value after suspend/resume

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=39550

--- Comment #16 from rick <rick.hendricksen at gmail.com> 2011-09-27 07:05:55 PDT ---
(In reply to comment #15)
> (In reply to comment #13)
> [snip]
> > Brightness control does not work before suspend, I did not try suspending. So
> > no.
> [snip]
> > I tried that. It works exactly the same as without this option. Brightness
> > control works fine before suspend, fails after.
> 
> I see a bit of contradiction in here
> 
> Firstly can you try nouveau kernel git tree [1], as it includes some patches
> regarding backlight/brightness
> 
> Note: Fedora may have precompiled package that is up-to date (search for koji)

I cloned the git repo you linked, and compiled my kernel (which works), but it
has the exact same issues as before.
$ uname -r
3.1.0-rc7+

> If it still fails please record the following 
> 
> example
> "with option "xxxxx" (acpi_backlight=vendor, nouveau.force_post=1)
> before suspend - works, after - stuck"
> 
with option: none
before suspend: works, after: stuck to low value
with option: nouveau.force_post=1
before suspend: stuck to low value, after: stuck to low value
with option: acpi_backlight=vendor
before suspend: works, after: stuck to low value
with option: acpi_backlight=vendor nouveau.force_post=1
before suspend: stuck to low value, after: stuck to low value

> it may be worth checking the registers (see comment 7) in each case as well

Maybe tomorrow, it took me long enough to get that kernel working. (I need
envytools right?)

> Cheers
> Emil
> 
> [1] http://cgit.freedesktop.org/nouveau/linux-2.6/

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