On Tue, 2009-04-28 at 10:43 +0800, Zhang Rui wrote: > On Tue, 2009-04-28 at 01:57 +0800, Maxim Levitsky wrote: > > I have a notebook which handles brightness keys in hardware, but tells > > loudly when it does so. > > > if you boot into console mode w/o ACPI video driver, does the brightness > still change when you press the hotkeys? They always work. For s while, due to buggy ACPI table, acpi 'video' driver won't work, so I blacklisted it, and yet hw keys did work. > > > Currently, acpi 'video' also sets the brightness, which result in double > > setting, and on top of that it emits a key that makes gpm set brightness > > again. > > > we need to support the brightness control in console mode. > and "brightness_switch_enabled" should be cleared in graphics mode to > prevent the ACPI video driver action upon hotkey events. How gnome power manager can do that, use /sys/module iface? > > > And (yes...) on top of that keyboard emits a brightness up/down even, > > which (you guessed...) sets brightness again. > > > > I found out that it is possible to tell gnome-power-manager not to set > > brightness, but yet in kernel driver still sets it. > > > > I found out even earlier that I can use brightness_switch_enabled=0, > > which supposed to make inkernel driver not touch the brightness. > > But I found out that this driver won't update the brightness, in /sys > > interface when I set this param. > > > No, when "brightness_switch_enabled" is cleared, gdm should still use > the ACPI backlight sysfs I/F if available to change the backlight, > i.e. /sys/class/backlight/acpi_video0/... Indeed it does, but I don't like it, hardware already changed the brightness, but it receives another two events about brightness up/down. It (and I too) can change the brightness, but it doesn't update to reflect current brightness (/sys/class/backlight/acpi_video0/brightness) shows cached value from last time it was set. there is also the actual_brightness, but I think it isn't used by gpm. > > what's the model name of your laptop? acer aspire 5720G > are you using Intel graphics? no, nvidia 8400GS > please attach the output of acpidump and lspci. > It would be great if you can file a bug report about this issue at > bugzilla.kernel.org. No problem. > > thanks, > rui Thanks too, Best regards, Maxim Levitsky
Attachment:
acpidump.bz2
Description: application/bzip
Attachment:
lspci.bz2
Description: application/bzip
