On lun, 2008-08-04 at 09:16 +0800, Zhang Rui wrote: > I think you're using the laptop that this patch does break. > Please try acpi_backlight=vendor. When booting to single user with acpi_backlight=vendor, thinkpad-acpi takes over backlight: Aug 4 07:54:38 hidalgo kernel: thinkpad_acpi: ThinkPad ACPI Extras v0.21 Aug 4 07:54:38 hidalgo kernel: thinkpad_acpi: http://ibm-acpi.sf.net/ Aug 4 07:54:38 hidalgo kernel: thinkpad_acpi: ThinkPad BIOS 7LETB9WW (2.19 ), EC 7KHT24WW-1.08 Aug 4 07:54:38 hidalgo kernel: thinkpad_acpi: Lenovo ThinkPad T61, model 8897CTO Aug 4 07:54:38 hidalgo kernel: thinkpad_acpi: radio switch found; radios are enabled Aug 4 07:54:38 hidalgo kernel: thinkpad_acpi: This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver Aug 4 07:54:38 hidalgo kernel: thinkpad_acpi: Disabling thinkpad-acpi brightness events by default... Aug 4 07:54:38 hidalgo kernel: Registered led device: tpacpi::thinklight Aug 4 07:54:38 hidalgo kernel: Registered led device: tpacpi::power Aug 4 07:54:38 hidalgo kernel: Registered led device: tpacpi:orange:batt Aug 4 07:54:38 hidalgo kernel: Registered led device: tpacpi:green:batt Aug 4 07:54:38 hidalgo kernel: Registered led device: tpacpi::dock_active Aug 4 07:54:38 hidalgo kernel: Registered led device: tpacpi::bay_active Aug 4 07:54:38 hidalgo kernel: Registered led device: tpacpi::dock_batt Aug 4 07:54:38 hidalgo kernel: Registered led device: tpacpi::unknown_led Aug 4 07:54:38 hidalgo kernel: Registered led device: tpacpi::standby Aug 4 07:54:38 hidalgo kernel: thinkpad_acpi: Standard ACPI backlight interface not available, thinkpad_acpi driver will take over control Aug 4 07:54:38 hidalgo kernel: thinkpad_acpi: detected a 16-level brightness capable ThinkPad Aug 4 07:54:38 hidalgo kernel: input: ThinkPad Extra Buttons as /devices/virtual/input/input6 Aug 4 07:54:38 hidalgo kernel: usb 1-1: new full speed USB device using uhci_hcd and address 4 Aug 4 07:54:38 hidalgo kernel: usb 1-1: configuration #1 chosen from 1 choice But when in user mode, brightness keys doesn't do anything either. Echo'ing to /proc/acpi/ibm/brightness doesn't work, but echoing to /sys/class/backlight/thinkpad_screen/brightness works. Cat'ing /proc/acpi/events still gives: video LCD0 00000086 00000000 video LCD0 00000087 00000000 At one time I get the 750ms delay, but I don't have the ibm/hotkey HKEY 00000080 00005010 at all. In X, same thing, no brightness keys, but xbacklight does work in standard mode (“kernel”). (btw it seems my mails don't reach linux-acpi, I don't really know why and postmaster don't answer, maybe they didn't have my mail either). Cheers, -- Yves-Alexis
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