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Bug#587014: screen brightness can't be modified on some Panasonic laptops)

The latest squeeze kernel (2.6.32-29) improved the situation. Now,
when the system boots, the backlight is not automatically set to its
maximum level. So, it is possible to set the backlight level
during the BIOS boot phase, and keep this level.

This is a big improvement since now the system is usable in a dark
environment, even is adjusting the backlight level requires a reboot.

Hotkeys still dont't work, and result in the following message in the
system console:
    ACPI: Failed to switch the brightness

Playing with /sys/class/backlight/panasonic/brightness doewsn't work

Nicolas LIMARE
http://nicolas.limare.net/                         pgp:0xFA423F4F

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