samsung x05 laptop: screen gets very bright before sleep

[Veiko Palge]

Hey,

I tried this patch then

http://people.freebsd.org/~jhb/patches/acpi_video_dpms.patch

---hope that's what you meant--- but no change.  thanks for the infos though.

best, Veiko

--




On 5/11/06, Nate Lawson <nate at root.org> wrote:
> Veiko Palge wrote:
> > Hi,
> >
> > I have a samsung x05 laptop (BIOS Version 11QK, latest ver) and with
> > FBSD 6.1 acpi works now out of box (given one sets
> > acpi.hw.reset_video=0).  There's one issue though: when the system
> > goes to sleep to S3, it turns from X to normal console, and then the
> > (normally black) background of the console turns very, very bright
> > white, with stripes seen.  Is this potentially problematic for the lcd
> > screen?  What might be the issue?  Does this occur possibly on other
> > laptops too?  Loading/ unloading acpi_video does not have any effect.
>
> LCDs work by having a backlight on all the time and selectively blocking
> it.  So it's likely your LCD turns off before the backlight, showing a
> screen of all white (actually transparent) before the backlight is also
> turned off.
>
> With the DPMS patch, that might power off the backlight first.
>
> --
> Nate
>