Problem with video output switching
From ThinkWiki
Contents
Affected Models
Problem Description
Problems with Intel chipsets
Disabling the internal LCD (e.g. when using an external Monitor) doesn't seem to work reliably.
- i810switch doesn't have any effect. After disabling the LCD it is still on (but the status display of i810switch claims that is is switched off).
- i855crt doesn't seem to allow to change the state of the internal LCD.
- With ibm-acpi,
# echo lcd_disable >/proc/acpi/ibm/video
works, but# echo lcd_enable >/proc/acpi/ibm/video
doesn't work - so one can't enable it anymore after disabling it. (the strange thing is that when switching to a console with ctrlaltF1 the LCD display is used for it, so there must be some way to enable it but I can't find out how to control this in X). I've tried this with version 0.8 and version 0.11 of ibm-acpi.
Problems with ATI chipsets
- It is a known issue of xorgs radeon driver that FnF7 doesn't work.
You might try the following: Hit Ctrl+Alt+F1 to switch to a console, hit Fn+F7 to switch video, hit Ctrl+Alt+F7 to switch back to X.
Related Links
Solutions
None (yet).