backlight off after resume on Samsung X25

[Nate Lawson]

Karlheinz Eckmeier wrote:
> I have a problem to resume on a Samsung X25 laptop after putting the system into
> the S3 sleep modus. The suspend works ok, but after the resume the backlight of 
> the LCD is off.
> 
> The resume seems to work ok otherwise - the system itself is up and running, 
> it's possible to enter commands on the commandline.
> 
> I tried to switch back and forth between VTYs and used radeontool to switch 
> the backlight on, but the screen stayed black.
> 
> Please see the output of dmesg (after boot -v) and "sysctl hw.acpi" below.
> The output of "acpidump -t -d" may be downloaded from
>   http://khe.v3consulting.com/khe-SamsungX25.asl
> 
> Recompiling the asl with iasl worked without any errors and warnings.
> 
> Further infomation about the system:
> Laptop:   Samsung X25
> Graphic:  ATI Mobility Radeon X600
> OS:	  FreeBSD 6.0
> 
> I you need more information, please let me know.
> 
> Any hints to fix this problem are appreciated very much, because I would
> love to get the S3 mode working. 

Try:

* without drm loaded
* In X or in console mode
* with acpi_video loaded
* with acpi_video + dpms patch that was floating around
* with radeontool

-- 
Nate