[ltp] Question on X60

Alex Deucher linux-thinkpad@linux-thinkpad.org
Thu, 1 Mar 2007 15:47:59 -0500

On 3/1/07, Henrique de Moraes Holschuh <hmh@hmh.eng.br> wrote:
> On Thu, 01 Mar 2007, Dieter Jurzitza wrote:
> > I would like to comment your comments :-) I appreciated a lot:
> > 1a.) I tested booting in runlevel 3, however,
> > echo "video_switch" > /proc/acpi/ibm/video
> > still does nothing.
> > This makes me guess that it is no X11 issue, but probably you know better. (to
> > Henrique)
> Please send me *by private mail* the DSDT (cat /proc/acpi/dsdt | gzip -9
> -f >x60.dsdt.gz) and dmidecode output for your X60.  Feel free to replace the
> serial number and UUIDs with XXX or whatever.
> > 1b.) i810switch can toggle all states: LFP only, CRT only, LFP + CRT, so I
> > think the i945 chipset in the X60 does support both outputs on. (to Alex)
> And it also means that the X.org and kernel drivers could add code to do it,
> if they haven't done that yet.  Good.  Someone that can test it could also
> start working on kernel framebuffer support.

IIRC, i810switch just uses vbe calls, so unfortunately, it's not
particularly useful from a driver perspective.  The Xorg driver can
already handle the output switching.  Adding support to the the intel
fb driver would require porting the xorg driver code.


> > I depend on being able to switch screens in a presentation, so whatever makes
> > things work is a help for me, be it a nice solution or an ugly ugly hack ;-).
> That's why ibm-acpi was born, it would not be even needed if the nice way
> did all that it should :)