Black Screen - No backlight on resume from suspend - Sony VAIO VGN-T2XP

[Cefn]

Binary package hint: hal

On suspend and resume the backlight doesn't come back on. Sony Vaio Sony VAIO VGN-T2XP running Linux Mint 7 <=> Ubuntu Jaunty

This appears to be a known problem since Intrepid, but nothing has been done since to match the hardware auto-detection to the quirks mode which is required to address the issue. This is a shame since it's a very likely problem for a large number of new ubuntu adopters to experience.

To address the bug for all time, someone on the HAL autodetection team needs to match this hardware signature with the relevant quirks mode.

The instructions at...
http://ubuntuforums.org/showthread.php?t=991403
...and the bug report at...
https://bugs.launchpad.net/ubuntu/+source/pm-utils/+bug/307126
...seem to be the same issue.

This bug is different because...
* it is a different version - Jaunty
* it is a different request - please fix in HAL autoconfiguration

ProblemType: Bug
Architecture: i386
DistroRelease: LinuxMint 7
Package: hal 0.5.12~rc1+git20090403-0ubuntu4
ProcEnviron:
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: hal
Uname: Linux 2.6.30-020630-generic i686
UnreportableReason: This is not a genuine LinuxMint package

[Cefn (6-launchpad-net-cefn-com)]

The specific modification I had to make to get the backlight back is to add these lines...

# added following suggestion at https://bugs.launchpad.net/ubuntu/+source/pm-uti
ls/+bug/307126
    HAL_PROP_POWER_MANAGEMENT_QUIRK_S3_BIOS=true
    HAL_PROP_POWER_MANAGEMENT_QUIRK_S3_MODE=true
    HAL_PROP_POWER_MANAGEMENT_QUIRK_DPMS_SUSPEND=true

...immediately below the line...
#!/bin/sh

...in the file...
/usr/lib/hal/scripts/linux/hal-system-power-suspend-linux

[Cefn (6-launchpad-net-cefn-com)]

There was a text wrapping/copy paste issue in the last comment I made. Instead, these are the correct instructions for changing the relevant file.

The specific modification I had to make to get the backlight back is to add these lines...

# added following suggestion at https://bugs.launchpad.net/ubuntu/+source/hal/+bug/431810
    HAL_PROP_POWER_MANAGEMENT_QUIRK_S3_BIOS=true
    HAL_PROP_POWER_MANAGEMENT_QUIRK_S3_MODE=true
    HAL_PROP_POWER_MANAGEMENT_QUIRK_DPMS_SUSPEND=true

...immediately below the line...
#!/bin/sh

...in the file...
/usr/lib/hal/scripts/linux/hal-system-power-suspend-linux

[dino99 (9d9)]

http://www.freedesktop.org/wiki/Software/hal/