On Wed, Apr 14, 2010 at 8:30 PM, Zhang Rui <rui.zhang@xxxxxxxxx> wrote: > On Thu, 2010-04-15 at 06:18 +0800, Chris Bagwell wrote: >> On Wed, Apr 14, 2010 at 12:26 PM, Matthew Garrett <mjg59@xxxxxxxxxxxxx> wrote: >> > On Wed, Apr 14, 2010 at 12:14:04PM -0500, Chris Bagwell wrote: >> > >> >> Does the acpi-video logic not have logic on its own to send key >> >> events? So I guess laptops that don't have custom modules to handle >> >> this type of stuff don't get visual feedback from gnome-power-manager? >> > >> > It does, but it's dependent upon the firmware sending them. >> >> I think the following tells me firmware is sending them. If I leave >> acpi_osi="Windows 2009" so that eeepc_laptop doesn't get loaded, I see >> events like this on /pro/acpi/event: >> >> video LCDD 00000087 00000000 >> video LCDD 00000087 00000000 >> video LCDD 00000086 00000000 >> video LCDD 00000086 00000000 >> >> Thats a couple decreases followed by a couple increases. >> > I have a EEEpc 1005PE. I'm looking at the backlight problem on this > machine, but it seems to be different from this one. > > The hotkey seems to work perfectly when ACPI video driver is loaded. > i.e. I get a single hotkey event when pressing the hotkey and the value > of /sys/class/backlight/acpi_video0/brightness changes correctly. > > The only problem I get is that the actual brightness does not change > consistently. > say, there are 15 brightness levels in all, > level 0, level 5 and level 12 give me a screen with lowest brightness. > If I want to get maximum backlight, I need to set it to level 4 or level > 11. If I do not set acpi_backlight=vendor and then change brightness by writing to above /sys/* link this is same behaviour I see as well. If I use Fn-F5 and Fn-F6, I do not see the issue (brightness increments linearly). I believe thats because events are not sent to /dev/input/event* and so software (gnome-power-manager) is never notified and won't wrote to /sys/*. If I launch power manager preferences and change brightness then I do see issue. In this case, I'm using Fedora 13 beta's kernel 2.6.33.2-41. > > could you tell me your BIOS version please? Yesterday, I was running 0901 and today I'm running 1003. Same behaviour in both cases. -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
