VESA DPMS Driver

[Colin Perkins]

On 30 Apr 2004, at 22:02, Anish Mistry wrote:
> On Friday 30 April 2004 04:19 pm, John Baldwin wrote:
>> On Thursday 29 April 2004 01:20 am, Benjamin Close wrote:
>>> Hi All,
>>>     I like many have suffered the battery drain of the laptop screen
>>> remaining on while the system is suspended. I've created a driver 
>>> that
>>> allows the screen to be shutdown by DPMS provided acpi supports video
>>> mode changes. Beware, this is my first kernel driver so it's nothing
>>> great. Hopefully it will help someone with enough knowledge build a
>>> better driver.
>>>
>>> It's a loadable kernel module and the only tweak required to get it
>>> compiling should be in the Makefile.
>>>
>>> You can grab it from:
>>> http://www.clearchain.com/people/benjsc/download/vesa_dpms.tar.gz
>>> A URL as the list strips attachments.
>>
>> I merged this into the acpi_video(4) driver (which already takes over 
>> ACPI
>> devices with a DOD, etc. handle) so that the two drivers aren't 
>> mutually
>> exclusive.  Unfortunately, my laptop doesn't have any _DOD, etc. 
>> methods
>> for its video device so I can't test it.  It's somewhat hackish as 
>> only
>> i386 has VM86 support, but the patch is at:
>>
>> http://www.FreeBSD.org/~jhb/patches/acpi_video_dpms.patch
> Just tested this, and it seems to work. :)

Also appears to work on my ThinkPad X22... very useful!

-- 
Colin Perkins
http://csperkins.org/