[Debian-eeepc-devel] 1005P camera won't disable

Trent W. Buck twb at cybersource.com.au
Tue Apr 6 10:59:04 UTC 2010


I don't use my 1005P's camera, so I want to power it down.
The normal technique doesn't work:

    # dmesg -c >/dev/null
    # cat /sys/devices/platform/eeepc/camera
    cat: /sys/devices/platform/eeepc/camera: No such device
    # echo 0 >/sys/devices/platform/eeepc/camera
    # cat /sys/devices/platform/eeepc/camera
    cat: /sys/devices/platform/eeepc/camera: No such device
    # dmesg            # the above didn't generate anything
    #

Here are some diagnostics:

    # powertop -dt15 | grep ^100.0%
    100.0%  USB device  1-6 : USB2.0 UVC VGA WebCam (Image Processor)
    100.0%  USB device usb1 : EHCI Host Controller (Linux 2.6.32-3-amd64 ehci_hcd)

    # uname -r
    2.6.32-3-amd64
    # aptitude search -F%v linux-image-`uname -r`
    2.6.32-9
    # grep -o acpi_osi=Linux /proc/cmdline
    acpi_osi=Linux
    # ls -l /sys/devices/platform/eeepc/camera
    -rw-r--r-- 1 root root 4096 Apr  6 20:51 /sys/devices/platform/eeepc/camera
    # dmesg -c | egrep 'uvc|video|v4l'
    [    0.284302] pci 0000:00:02.0: Boot video device
    [    2.746072] ACPI Warning: _BQC returned an invalid level (20090903/video-631)
    [    4.114592] Linux video capture interface: v2.00
    [    4.136972] eeepc_laptop: Backlight controlled by ACPI video driver
    [    4.206002] uvcvideo: Found UVC 1.00 device USB2.0 UVC VGA WebCam (13d3:5111)
    [    4.208653] usbcore: registered new interface driver uvcvideo

The behaviour is the same with experimental's
linux-image-2.6.33-2-amd64=2.6.33-1~experimental.4, except that the
write also fails.

I can't see any camera option in the BIOS (unlike my 701).  I'm running
BIOS 1005P-ASUS-0901.ROM.

Can anybody reproduce this behaviour?  Is there any other information I
should include in "reportbug linux-image-2.6.32-3-amd64"?




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