[ltp] Can bot use Fn+F7 to switch LCD/CRT on Thinkpad X60s

[Alex Deucher]

On 12/5/06, gulfstream <gulfstream.wang@gmail.com> wrote:
> I can not use fn+f7 to switch outputs when bios or grub is up. It is so
> strange if the bios does not support output switching, because the output
> switching is import to laptop.

Well, I think at this point, since most people use the gui
exclusively, there's little need to support text mode output
switching.  It's just extra work/time/money for the developer when
they have to write a driver for the gui anyway, plus when the gui is
active and drivng the hardware you don't want something like the bios
going in and messing with the state of the hardware behind the
driver's back.  I think more and more laptops will simply have their
output toggle key produce acpi events, and then they will hook those
events to handlers in the os driver for the included video chip.

Alex

>
> gulfstream
>
>
>
>  2006/12/5, Alex Deucher <alexdeucher@gmail.com>:
> > On 12/5/06, gulfstream <gulfstream.wang@gmail.com> wrote:
> > > Oh, how to solve this problem with intel graphics card?
> >
> > It may not be possible.  Are you able to use fn-f7 to switch outputs
> > when just the bios or grub is up?  If not, I suspect your bios doesn't
> > support output switching.
> >
> > Alex
> >
> > >
> > > 2006/12/5, Alex Deucher <alexdeucher@gmail.com >:
> > > > On 12/5/06, Richard Neill <rn214@hermes.cam.ac.uk> wrote:
> > > > >
> > > > >
> > > > > gulfstream wrote:
> > > > > > I want to switch lcd/crt in X window and tty, but xorg.conf is
> useful
> > > to
> > > > > > xorg. How to do if I want to switch lcd/crt in tty?
> > > > >
> > > > > You still need something like:
> > > > >
> > > > > Section "Device"
> > > > >     ...
> > > > >     Option "BiosHotKeys" "on"      #Enable Fn-F7 for switching
> between
> > > > > CRT,LCD,Both.
> > > > > EndSection
> > > > >
> > > >
> > > >
> > > > This option only applies to the radeon driver.
> > > >
> > > > Alex
> > > >
> > > >
> > > > >
> > > > > Some of the video drivers don't pay attention to Fn-F7 by default.
> > > > > Besides which, even if you are currently looking at a tty, you are
> still
> > > > > using the xorg video driver [unless you use the vesa or framebuffer
> > > driver].
> > > > >
> > > > > Root cause of problem: xorg isn't just a GUI, it also overlaps with
> the
> > > > > kernel, and contains hardware drivers. Notably, the video drivers
> are
> > > > > (mainly) in X, not the kernel.
> > > > >
> > > > >
> > > > > Richard
> > > > >
> > > > >
> > > > > >
> > > > > >
> > > > > > gulfstream
> > > > > >
> > > > > > 2006/12/5, Richard Neill < rn214@hermes.cam.ac.uk
> > > > > > <mailto:rn214@hermes.cam.ac.uk>>:
> > > > > >
> > > > > >       gulfstream wrote:
> > > > > >      > I have use ibm_acpi module in my kernel( 2.6.18), and I can
> use
> > > > > >     Fn+F4 to
> > > > > >      > suspend to RAM and Fn+F12 to suspend to disk. But the
> system do
> > > not
> > > > > >      > respond to Fn+F7, so I can not switch the LCD and external
> CRT.
> > > > > >      > Moreover, when I run "echo video_switch >
> /proc/acpi/ibm/video"
> > > > > >     in the
> > > > > >      > terminal, no any respond. How to solve this matter?
> > > > > >      >
> > > > > >      > My laptop is Thinkpad X60s with Intel 945GM graphics
> chipsets.
> > > The
> > > > > >      > system is Debian etch with tpb installed.
> > > > > >      >
> > > > > >
> > > > > >
> > > > > >     At least on some machines, it's necessary to enable a flag in
> > > xorg.conf,
> > > > > >     iirc: EnableBiosHotKeys.  Read  man `your-Xorg-driver`.
> > > > > >
> > > > > >     HTH,
> > > > > >
> > > > > >     Richard
> > > > > >     --
> > > > > >     The linux-thinkpad mailing list home page is at:
> > > > > >
> > >
> http://mailman.linux-thinkpad.org/mailman/listinfo/linux-thinkpad
> > > > > >
> > > > > >
> > > > > --
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> > > > >
> > >
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> > > > >
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> > > >
> > >
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> > > >
> > >
> > >
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