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    SubjectRe: 2.6.30-rc1 (latest git): thinkpad-acpi: cannot control brightness with hotkeys
    (cc's added)

    On Sat, 11 Apr 2009 23:07:16 +0200 Niel Lambrechts <> wrote:

    > Hi there,
    > With latest git kernel, I'm no longer able to control my Thinkpad (W500)
    > brightness, although I can still control the backlight, bluetooth etc.

    So 2.6.29 was OK?

    > I originally got some errors (below), but I was able to get around them
    > by changing /etc/modprobe.d/thinkpad_acpi
    > from the (default OPENSUSE)
    > options thinkpad_acpi experimental=1 hotkey=enable,0xffffff
    > to
    > options thinkpad_acpi experimental=1
    > Any ideas on how I can regain control over the brightness gas-pedal?
    > Niel
    > dmesg:
    > thinkpad_acpi: ThinkPad ACPI Extras v0.22
    > thinkpad_acpi:
    > thinkpad_acpi: ThinkPad BIOS 6FET50WW (1.20 ), EC 7VHT12WW-1.01
    > thinkpad_acpi: Lenovo ThinkPad W500, model 40622XG
    > thinkpad_acpi: radio switch found; radios are enabled
    > thinkpad_acpi: This ThinkPad has standard ACPI backlight brightness
    > control, supported by the ACPI video driver
    > thinkpad_acpi: Disabling thinkpad-acpi brightness events by default...
    > thinkpad_acpi: procfs hotkey enable/disable: access by process with PID 890
    > WARNING: at drivers/platform/x86/thinkpad_acpi.c:2954
    > hotkey_enabledisable_warn+0x3e/0x43 [thinkpad_acpi]()
    > thinkpad_acpi: hotkey enable/disable functionality has been removed from
    > the driver. Hotkeys are always enabled.
    > Modules linked in: thinkpad_acpi(+) snd_hda_intel(+) rfkill
    > snd_hda_codec rtc_cmos snd_hwdep mac80211 video i2c_i801 rtc_core
    > snd_pcm ohci1394 led_class battery ac output snd_timer snd soundcore
    > snd_page_alloc e1000e intel_agp button joydev wmi i2c_core sr_mod
    > rtc_lib cfg80211 sg ieee1394 iTCO_wdt agpgart cdrom nvram
    > iTCO_vendor_support sd_mod ehci_hcd uhci_hcd usbcore ext4 jbd2 crc16 edd
    > ext3 mbcache jbd fan ahci libata scsi_mod thermal processor
    > [<f81a3f7c>] hotkey_enabledisable_warn+0x3e/0x43 [thinkpad_acpi]
    > [<f81a5234>] hotkey_write+0x68/0x162 [thinkpad_acpi]
    > [<f7c63f62>] thinkpad_acpi_module_init+0x742/0x839 [thinkpad_acpi]
    > [<f7c63820>] ? thinkpad_acpi_module_init+0x0/0x839 [thinkpad_acpi]
    > Registered led device: tpacpi::thinklight
    > thinkpad_acpi: Standard ACPI backlight interface available, not loading
    > native one.

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