[ltp] T420 /proc/acpi/ibm/video not working
Sat, 7 Feb 2015 12:14:45 +0000
>When I cat /proc/acpi/ibm/video it shows every monitor disabled, even when
>int and ext are on.
>Echoing anything there has no effect at all. It all worked fine in my
>T42. What I would like to do is just use the video_switch command.
>Is this a known problem, and is there a workaround?
Sorry, I posted in haste. When I say 'int' and 'ext' I mean LCD and
# cat /proc/acpi/ibm/video
commands: lcd_enable, lcd_disable
commands: crt_enable, crt_disable
commands: dvi_enable, dvi_disable
commands: auto_enable, auto_disable
commands: video_switch, expand_toggle
I'm currently upgrading to last stable kernel to see if there's a