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[opensuse] Cannot find ACPI handle for VGA device 0000:01:00.0
Hello.

After having updated my OpenSuSE 13.2 system to

# uname -a
Linux linux-8dae 3.16.7-21-desktop #1 SMP PREEMPT Tue Apr 14 07:11:37
UTC 2015 (93c1539) x86_64 x86_64 x86_64 GNU/Linux

I'm getting some new error messages

[ 4.530621] bbswitch: version 0.8
[ 4.530630] bbswitch: cannot find ACPI handle for VGA device 0000:01:00.0
[ 4.530633] bbswitch: No discrete VGA device found

PCI device 01:00.00 is a

01:00.0 VGA compatible controller: NVIDIA Corporation GK106 [GeForce GTX
660] (rev a1)

And also sometimes I get

[ 7740.061204] nouveau E[ DRM] GPU lockup - switching to software fbcon
[ 7744.197641] nouveau E[ PFIFO][0000:01:00.0] SCHED_ERROR [
CTXSW_TIMEOUT ]
[ 7744.198170] nouveau E[ PFIFO][0000:01:00.0] PGRAPH engine fault on
channel 1, recovering...

I'm using nouveau as in the past I did have a lot of issues with the
nvidia driver (i.e.with OpenGL).
Sometimes the problem is really severe and the graphical system hangs
(however remote logins (ssh etc) are still OK).

By googling/searching I could not find any hint on how to solve the two
issues on OpenSuSE 13.2.

Tnx in advance for your help.

Marco

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