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Old 16th July 2012, 01:08 PM
divinorum Offline
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Join Date: Dec 2010
Location: Slovakia
Posts: 16
wakeup from suspend - lcd backlight switched off

Hi All, really appreciated any help in advance.

I have same issue on every wakeup from sleep. laptop is being started correctly, I can see screen from some angles, but lcd backlight is switched off. I did some tests, like switching terminals, etc, but light is always switched off until next reboot.

I have appended acpi_backlight=vendor to the Grub booting line, which solved my problem with HW brightness controll, but suspend / wakeup is still not working as expected.

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Old 19th July 2012, 10:05 AM
divinorum Offline
Registered User
Join Date: Dec 2010
Location: Slovakia
Posts: 16
Re: wakeup from suspend - lcd backlight switched off

Finally, I can reply to myself.

This seems to be ACPI problem within 2.4 Kernel. Upgrade to Kernel 3.5.0 RC7 from rawhide repo solved this issue !
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backlight, lcd, suspend, switched, wakeup

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