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-   -   /proc/acpi/video/...../DOS not available for hotkey display switching (http://www.nvnews.net/vbulletin/showthread.php?t=111381)

the 04-09-08 08:28 AM

/proc/acpi/video/...../DOS not available for hotkey display switching
 
Hi all,

I would like to switch displays with the Fn+F7 hotkey on my ThinkPad.

ThinkPad: T61
Linux Distro: RHEL5
Kernel version: 2.6.18-87.el5
Graphics card: nVidia Corporation Quadro FX 570M (rev a1).

Examining the Xorg.0.log file I can find this message:
Quote:

(WW) NVIDIA(0): Error: Unable to find DOS (Enable/Disable output switching)
(WW) NVIDIA(0): file path under /proc/acpi/video. NVIDIA X driver will not
(WW) NVIDIA(0): be able to respond to display change hotkey events.
So I checked /proc/acpi/video and the directory is empty, instead I have a file /proc/acpi/ibm/video but no DOS.

What is missing on my system?

Thank you.


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