[Intel-gfx] Meaning of "fbpercrtc=1" option?

[Marc Deop i Argemí]

On Wednesday 07 October 2009 11:53:16 Tobias Hain wrote:
> Am Mittwoch, 7. Oktober 2009 11:07:57 schrieb Marc Deop i Argemí:
> > On Wednesday 07 October 2009 10:14:37 Tobias Hain wrote:
> > > I resolved both issues by booting with "fbpercrtc=1" option, which I
> > > found in  the source code. It boots fine with a huge 1920 x 1200
> > > console only on the external screen and switching between X and console
> > > leaves the internal LVDS turned off. That's the way I want to use it.
> >
> > That's what I've been looking for some time although... it does not work
> >  for me :S
> >
> > Any other way to set the external display to its maximum res(1920x1080?
> 
> Did you make sure you set the parameter in the correct location?
> 
> If KMS is compiled into the kernel
> grep KMS /boot/config-*
> CONFIG_DRM_I915_KMS=y

marc at Telperion:~/Documents$ grep KMS /boot/config-2.6.31-1.dmz.3-liquorix-686 
CONFIG_DRM_KMS_HELPER=m
CONFIG_DRM_I915_KMS=y

> then you have to add i915.fbpercrtc=1 to the grub menu options.
> 

that returns: "Unknown boot option"

Tried simply fbpercrtc=1 although that didn't work either (however it seemed 
to accept the option with no effect though)

> If KMS is compiled as a module:
> CONFIG_DRM_I915_KMS=m
> then you may need to do the following depending on your distribution:
> 
> add to /etc/initramfs-tools/modules
> # Enable Kernel Modesetting
> intel_agp
> drm
> i915 modeset=1 fbpercrtc=1
> 
> and issue:
> update-initramfs -u
> 

Tried this too, no success though :( Any other ideas?

FYI:

Toshiba U200 Core Duo 1,86GHz 2,5Gb RAM Intel 945GM
Linux Telperion 2.6.31-1.dmz.3-liquorix-686 #1 ZEN SMP PREEMPT
Debian Sid