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Bug#819576: linux-image-4.4.0-0.bpo.1-amd64: Brightness slowdown - Changing brightness takes some seconds and causes system slowdown

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I uninstalled the 3 modules mentioned from kernel 4.4 and it didn't solve
the problem.

"uname -a" command result:
Linux debian 4.4.0-0.bpo.1-amd64 #1 SMP Debian 4.4.6-1~bpo8+1 (2016-03-20)
x86_64 GNU/Linux

"dkms status" command result:
bbswitch, 0.8, 3.16.0-4-amd64, x86_64: installed
bbswitch, 0.8, 4.3.0-0.bpo.1-amd64, x86_64: installed
nvidia-current, 352.79, 3.16.0-4-amd64, x86_64: installed
nvidia-current, 352.79, 4.3.0-0.bpo.1-amd64, x86_64: installed
virtualbox, 5.0.16, 3.16.0-4-amd64, x86_64: installed
virtualbox, 5.0.16, 4.3.0-0.bpo.1-amd64, x86_64: installed


2016-03-30 16:50 GMT-03:00 Ben Hutchings <ben@decadent.org.uk>:

> Control: tag -1 moreinfo
>
> On Wed, 2016-03-30 at 14:14 -0300, Leonardo Santana Vieira wrote:
> > Package: src:linux
> > Version: 4.4.6-1~bpo8+1
> > Severity: important
> >
> > Dear Maintainer,
> >
> > After kernel upgrade, changing brightness takes some seconds and causes
> system
> > slowdown if i try to change more than one level at a time. This problem
> does
> > not happen in the other kernel packages i have installed(3.16, 4.3). I'm
> using
> > Gnome desktop, the problem happens when i try the change through the
> menu at
> > the top bar and especially if i try using fn keys to do it. If a hold
> fn+f5 or
> > f6 all the way to minimum or maximum, the action causes severe slowdown
> in the
> > system making it unusable for some time. I have theses modules installed
> in all
> > the kernel packages as can be seen below the result of "dkms status"
> command.
> >
> > bbswitch, 0.8, 3.16.0-4-amd64, x86_64: installed
> > bbswitch, 0.8, 4.3.0-0.bpo.1-amd64, x86_64: installed
> > bbswitch, 0.8, 4.4.0-0.bpo.1-amd64, x86_64: installed
> > nvidia-current, 352.79, 3.16.0-4-amd64, x86_64: installed
> > nvidia-current, 352.79, 4.3.0-0.bpo.1-amd64, x86_64: installed
> > nvidia-current, 352.79, 4.4.0-0.bpo.1-amd64, x86_64: installed
> > virtualbox, 5.0.16, 3.16.0-4-amd64, x86_64: installed
> > virtualbox, 5.0.16, 4.3.0-0.bpo.1-amd64, x86_64: installed
> > virtualbox, 5.0.16, 4.4.0-0.bpo.1-amd64, x86_64: installed
> [...]
>
> Please test without these modules installed.
>
> Ben.
>
> --
> Ben Hutchings
> Tomorrow will be cancelled due to lack of interest.

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Bug#819576: linux-image-4.4.0-0.bpo.1-amd64: Brightness slowdown - Changing brightness takes some seconds and causes system slowdown Leonardo Santana Vieira <leosanvieira@gmail.com> - 2016-03-30 19:20 +0200
  Bug#819576: linux-image-4.4.0-0.bpo.1-amd64: Brightness slowdown - Changing brightness takes some seconds and causes system slowdown Ben Hutchings <ben@decadent.org.uk> - 2016-03-30 22:00 +0200
    Bug#819576: linux-image-4.4.0-0.bpo.1-amd64: Brightness slowdown - Changing brightness takes some seconds and causes system slowdown Leonardo Santana Vieira <leosanvieira@gmail.com> - 2016-03-31 04:30 +0200

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