problem with bbswitch module on reboot

[Alexander Volovics]

I am using the 'bbswitch' module to disable the nvidia card
and save power on a laptop with optimus.

I removed nouveau permanently by blacklisting and then running dracut.

I compiled bbswitch with 'dkms' and then added the following:

#!/bin/sh

if [ ! -c /proc/acpi/bbswitch ] ; then
        exec /sbin/modprobe bbswitch load_state=0 >/dev/null 2>&1
fi

to /etc/sysconfig/modules.

This works perfectly if the laptop is started up after powering off
('power off' from the menu or 'shutdown -h now')

However when I 'restart' (from the menu or 'shutdown -r now') this
does not work: 'bbswitch' can't find the discrete VGA device!
And consequently it is not loaded.

Can somebody explain what is happening.
For 'bbswitch' info see: https://github.com/Bumblebee-Project/bbswitch

AV

[Tim]

On Wed, 2012-10-24 at 15:57 +0200, Alexander Volovics wrote:
> However when I 'restart' (from the menu or 'shutdown -r now') this
> does not work: 'bbswitch' can't find the discrete VGA device!
> And consequently it is not loaded.

Any BIOS options regarding resetting video hardware upon resume, or
similar?

[Alexander Volovics]

On Thu, Oct 25, 2012 at 01:41:22AM +1030, Tim wrote:
> On Wed, 2012-10-24 at 15:57 +0200, Alexander Volovics wrote:
> > However when I 'restart' (from the menu or 'shutdown -r now') this
> > does not work: 'bbswitch' can't find the discrete VGA device!
> > And consequently it is not loaded.
>
> Any BIOS options regarding resetting video hardware upon resume, or
> similar?

No, nothing.

AV