On Sat, 22 Dec 2007, Zhang Rui wrote:
On Sat, 2007-12-22 at 06:36 +0800, Andrei Gaponenko wrote:
With 2.6.23 or newer (including 2.6.24-rc6) kernels, writing to the
/sys/devices/platform/asus-laptop/display file does not do anything:
...
hmm, please "echo 1 > /proc/acpi/video/xxx/DOS" in 2.6.23 and see
if there is any difference.
ls /proc/acpi/video/
shows two identically named directories "VGA" - is this normal??
Anyway,
# cat VGA/DOS
DOS setting: <1>
# echo 3 > VGA/DOS
# cat VGA/DOS
DOS setting: <3>
but no image on external. Now
# rmmod video
# echo 3 > /sys/devices/platform/asus-laptop/display
Got image on external
# modprobe video
# cat VGA/DOS
DOS setting: <0>
I can write 1 or 3 to DOS and read it back, but it has no effect (image on
external turned on while video module was removed does not go away).
Please Cc: me on replies - forgot to mention this in the initial posting.
Thanks!
Andrei
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