linux-kernel - Re: 2.6.30-rc1 (latest git): thinkpad-acpi: cannot control brightness with hotkeys

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Message-ID: <49E11FD0.9040403@gmail.com>
Date:	Sun, 12 Apr 2009 00:55:12 +0200
From:	Niel Lambrechts <niel.lambrechts@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	"linux.kernel" <linux-kernel@...r.kernel.org>,
	Henrique de Moraes Holschuh <hmh@....eng.br>,
	linux-acpi@...r.kernel.org
Subject: Re: 2.6.30-rc1 (latest git): thinkpad-acpi: cannot control brightness
 with hotkeys

On 04/12/2009 12:05 AM, Andrew Morton wrote:
> (cc's added)
>
> On Sat, 11 Apr 2009 23:07:16 +0200 Niel Lambrechts <niel.lambrechts@...il.com> 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: http://ibm-acpi.sf.net/
>> 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.
>>
>>     
>
>
>   
Could it be related to this commit?

commit 0e501834f8c2ba7de2a56e332d346dcf4ac0b593
Author: Henrique de Moraes Holschuh <hmh@....eng.br>
Date:   Sat Apr 4 04:25:53 2009 +0000

    thinkpad-acpi: rework brightness support

    Refactor and redesign the brightness control backend...

Regards,
Niel
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