Bug 2025 - Backlight never turns off
Summary: Backlight never turns off
Status: RESOLVED WORKSFORME
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/savage (show other bugs)
Version: 7.0.0
Hardware: x86 (IA32) Linux (All)
: high normal
Assignee: Xorg Project Team
QA Contact: Xorg Project Team
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2004-12-06 12:30 UTC by Scott Bronson
Modified: 2007-07-11 18:27 UTC (History)
5 users (show)

See Also:
i915 platform:
i915 features:

Attachments

Description Scott Bronson 2004-12-06 12:30:23 UTC 
Using 6.8.1-1ubuntu4, the backlight on my IBM T-23 (S3 Inc. SuperSavage IX/C SDR
rev 05) never turns off.  When I run "xset dpms force off", the screen blanks
but the backlight remains on.  While the screen is blanked, xset q reports:

  DPMS (Energy Star):
    Standby: 0    Suspend: 0    Off: 600
    DPMS is Enabled
    Monitor is Off

Note that in my xorg.conf, the driver is "savage", not "s3savage"
(Driver/s3savage component).
Comment 1 Alex Deucher 2004-12-08 09:27:45 UTC 
you need to use xorg cvs.  I added backlight control after 6.8.x was released. 
If cvs give you problems let me know as I have an alternative method you can
try.  FWIW, the cvs driver also supports dualhead.
Comment 2 Felix Kühling 2005-02-03 17:09:38 UTC 
Later on I added code that uses the BIOS to switch off the LCD backlight. This
is only applied on ProSavage and Twister chips. Should this also be done on
SuperSavages?
Comment 3 Alex Deucher 2005-02-03 17:24:28 UTC 
(In reply to comment #2)
> Later on I added code that uses the BIOS to switch off the LCD backlight. This
> is only applied on ProSavage and Twister chips. Should this also be done on
> SuperSavages?

I'm not sure.  I think the register crunching for mx/ix should work on
supersavages too.  One user confirmed it did, but I've never tested it myself.
It does work on mx/ix.
Comment 4 Oleksij Rempel 2005-02-13 23:20:27 UTC 
Hi, i have savage mx/ix, with Xorg CVS (12 February 2005).  
The backlight on my Samsung NV5000 don't working now. But it worked with cvs 
(10 January 2005)
Comment 5 Erik Andren 2006-04-02 19:00:43 UTC 
Whats the status of this bug using a current version of xorg?
Comment 6 Alex Deucher 2006-04-03 00:03:34 UTC 
It should work.  I only have a savage mx/ix to test with, but it works on here
and I've gotten word from several others that it works on supersavage as well
(xorg cvs HEAD and xorg 7.0).  If you have problems with cvs or 7.0, please open
a new bug.
Comment 7 Oleksij Rempel 2006-04-03 03:07:45 UTC 
For me it's not working.
I use gentoo-2006 with xorg-7.0-rc1.
When I run "xset dpms force off", the screen blanks
but the backlight remains on.
Comment 8 Michel Dänzer 2006-04-03 15:58:23 UTC 
Beware of bug 5665.
Comment 9 Oleksij Rempel 2006-04-16 00:02:08 UTC 
The bug 5665 looks a bit different. My laptop can't at all power off lcd.But
it's worked with xfree about two jears ago, now i can't reproduse it working :(
.With wind$ it's working.
Comment 10 Daniel Stone 2007-02-27 01:24:47 UTC 
Sorry about the phenomenal bug spam, guys.  Adding xorg-team@ to the QA contact so bugs don't get lost in future.
Comment 11 Alex Deucher 2007-07-11 18:27:21 UTC 
seems to work fine on my T23. reopen if you are still having problems.

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