Other symptoms of this bug when it kicks in: wireless toggle (radio
tower multimedia key on F2) and reporting of the close state of the lid
to the OS seem broken too (so I can't suspend on lid closure after
turning it on; annoying to me). System also appears to think the system
is on AC power when
Confirmed here, Studio 1555 with Intel GM45 graphics and a few other
differences in hardware options.
Almost certainly this is that same bug as
http://bugzilla.kernel.org/show_bug.cgi?id=13689
** Bug watch added: Linux Kernel Bug Tracker #13689
http://bugzilla.kernel.org/show_bug.cgi?id=13689
There is a solution for this. I did not try it on my own yet, but it
seems to work for some people. Have a look at this post by shiBBy2k7 on
http://ubuntuforums.org:
http://ubuntuforums.org/showpost.php?p=7541070&postcount=24
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No change display brightness
https://bugs.launchpad.net/bugs/392812
I tried to add in /boot/grub/menu.lst saome boot options.
At line after "# defoptions=quiet splash" I added:
- "acpi=force" - didn't work;
- "acpi=force nolapic" - didn't work;
- "acpi="off" - I been able to change brightness, but no battery status and
other options;
- "noapic" - it's work on my
Same here. Sometimes after several minutes, sometimes just after bootup.
Is not only a problem with brightness buttons but with any ACPI related event:
switching off backlight when closing lid, detecting if the laptop is in AC or
battery...
--
No change display brightness
https://bugs.launchpad
** Tags added: acpi brightness dell
** Attachment added: "lspci.txt"
http://launchpadlibrarian.net/28457079/lspci.txt
--
No change display brightness
https://bugs.launchpad.net/bugs/392812
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