[Bug 573984] Re: Screen brightness can not be adjusted in Lucid with Intel Arrandale graphics

[Tony Diep]

Updated to Ubuntu 10.10 today on my Gateway NV59

Screen brightness still can not be adjusted without causing other
problems. Only solution causes CPU to run hot and without
hyperthreading. Here are the results of various parameters for grub:


#GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nolapic acpi_backlight=vendor"
#result: brightness doesn't change; oncreen display disappears
#GRUB_CMDLINE_LINUX="acpi=ht"
#result: brightness doesn't change;
#GRUB_CMDLINE_LINUX="acpi=off"
#result: brightness changes correctly; no onscreen display; no CPU temperature reading; no hyperthreading
#GRUB_CMDLINE_LINUX="acpi_generic_hotkey"
#result: pressing hot keys slows down mouse
#GRUB_CMDLINE_LINUX="acpi=strict"
#result: brightness does not change
#GRUB_CMDLINE_LINUX="acpi_osi=Linux"
#result: brightness does not change; onscreen display disappears
#GRUB_CMDLINE_LINUX="acpi_osi="
#result: brightness does not change; onscreen display disappears
#GRUB_CMDLINE_LINUX="acpi=noirq"
#result: brightness does not change; onscreen display disappears; mouse very slow after using brigthness up down function keys
#GRUB_CMDLINE_LINUX="acpi=noacpi"
#result: brightness does not change;
#GRUB_CMDLINE_LINUX="acpi_backlight=vendor"
#result: brightness does not change; onscreen display disappears

-- 
Screen brightness can not be adjusted in Lucid with Intel Arrandale graphics
https://bugs.launchpad.net/bugs/573984
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