Hi,
Typically, what I want is that a laptop detects when an external monitor
is plugged/unplugged, then execute the user preferred action for _that_
device ("xrandr --auto" or open grandr or use an arandr [wnpp 484849]
profile or others[6]...).
This should be possible !
ACPI[1] is supposed to know which devices are connected[2] and generate
an event[3][4] when a monitor is plugged/unplugged.
The state is exported in sysfs [2][5]
> grep "" /sys/class/video_output/*/state
> /sys/class/video_output/acpi_video0/state:0000001f
> /sys/class/video_output/acpi_video1/state:0000000d
> /sys/class/video_output/acpi_video2/state:0000001d
> /sys/class/video_output/acpi_video3/state:0000001f
> /sys/class/video_output/acpi_video4/state:0000000d
> /sys/class/video_output/acpi_video5/state:0000001d
I don't receive such acpi event on my system (Thinkpad T60).
What about you ?
Franklin
On Sun, 2008-06-22 at 10:33 -0400, Carl Fink wrote:
> On Sat, Jun 21, 2008 at 09:22:16PM +0000, Jack Malmostoso wrote:
> > On Sat, 21 Jun 2008 20:40:11 +0200, Franklin PIAT wrote:
> >
> > > I'm wondering how you handle this. Any great idea we could enable in
> > > Lenny ?
> >
> > grandr is your friend.
>
> There was an article on this very subject in last month's Linux Journal.
I couldn't find it. Is it available online ?
--
[1] http://acpi.info/DOWNLOADS/ACPIspec30b.pdf
[2] above specs: B.6.6 _DCS (Return the Status of Output Device)
[3] above specs: B.5 Notifications for Display Devices
[4]
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=drivers/acpi/video.c#l1813
[5] /usr/share/doc/linux-doc-2.6.25/Documentation/video-output.txt.gz
[6] http://www.thinkwiki.org/wiki/Sample_Fn-F7_script
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