retitle 531374 hal-info: Backlight not turned off for Inspiron 4000
suspend (white screen)
reassign 531374 hal-info
thanks

Hi hal-info maintainers,

On this Inspiron 4000 laptop, suspending turns the screen a uniform
dull grey. This is because it uses an ATI Rage 128-based card (PCI id
1002:4c46) that needs the Radeon backlight quirk.

Would it be possible to add an entry to
/usr/share/hal/fdi/information/10freedesktop/20-video-quirk-pm-dell.fdi
accordingly? Everything works great (and much better than with the
default try-everything setting) with quirk.radeon_off enabled and no
others.

Additional information from my previous report:

> I started to try testing the various quirks, but I am not sure what to
> test for.  The laptop has TV-out and standard monitor ports but so far
> I have only tried the built-in LCD.
>
> s2ram -n :
>
>        Machine unknown
>        This machine can be identified by:
>            sys_vendor   = "Dell Computer Corporation"
>            sys_product  = "Inspiron 4000"
>            sys_version  = ""
>            bios_version = "A23"
>
> The screen is a Samsung LT141X8-L02, TFT LCD panel. The kernel ACPI
> driver is loaded, no APM.  “vbetool dpms suspend”, “vbetool dpms off”,
> and “radeontool light off” all work to turn off the backlight.

See also <http://thread.gmane.org/gmane.linux.kernel.suspend.devel/7077>,
the corresponding uswsusp bug.

Thanks,
Jonathan



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