[Pkg-utopia-maintainers] Bug#531374: [Bug #531374] pm-utils: Backlight not turned off for Inspiron 4000 suspend (white screen)

[Jonathan Nieder]

Hi hal team,

I sent this bug report a while ago, but I think I failed to send you a
copy when reassigning it.  Sorry about that!  I hope it is of some use.

Jonathan Nieder wrote:
> 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.
 
Ideally it would be nice to find an expression that matches all laptops
with an r128 (or radeon), not just this one.  But the DMI information is
better than nothing.

Thanks,
Jonathan