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Old 6th December 2009, 04:19 AM
GreyWizzard Offline
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Join Date: May 2005
Location: Oklahoma City, Oklahoma USA
Age: 47
Posts: 312
Backlight dimming/brightening just stopped working...

Have an older HP DV9000 notebook running F11 x86_64.

Have been using the 'fn' key and the f7/f8 keys to both raise and lower the backlight on the book for quite some time now with no issues.

Earlier tonight, I added another user to my notebook and was even able to get onto their Gnome desktop and use the 'fn' key combos to lower the screen brightness, but now I can't get it to work again in EITHER my own user account OR the new one to RAISE the backlight again.

It's as if my keymapping suddenly just went poof...

I have never had to look for where this is was controlled or even know how it worked since it simply worked from the get go, but now that it is not working I need some pointers, please.
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Old 6th December 2009, 05:13 AM
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I took a look in my /sys/class/backlight/acpi_video0 folder and saw that bl_power was set to 0 and everything else is set to 7, don't know if that helps or not. You could try to adjust the brightness in the BIOS, but of course none of this fixes your keymapping problem.
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backlight, dimming or brightening, stopped, working

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