2011-03-17 'Dominik Kopp' wrote:
> Hi,
> I have also a x100e and I can use all 16 brightness levels in linux as well
> as in Win 7. (independently what the latest level in Win7 was)
>
> => For me it's just a bug in the print out of dmesg. It should be 16
> instead of 8.
Confirmed, working here as well.
I don't use Windows though, so I can't say if the Windows driver manages
to sometimes mess something up here.
cd /sys/devices/virtual/backlight/acpi_video0
for f in * ; do echo -n "$f: "; cat $f; done 2>/dev/null
actual_brightness: 10
bl_power: 0
brightness: 10
device: max_brightness: 15
-----
kernel: 2.6.36-tuxonice-r5 (from Gentoo) with tp_smapi 0.40 patch
-----
dmesg | egrep -C2 'brightne'
ACPI: (supports S0 S3 S4 S5)
ACPI: Using IOAPIC for interrupt routing
[Firmware Bug]: ACPI: No _BQC method, cannot determine initial brightness
ACPI: EC: GPE = 0x3, I/O: command/status = 0x66, data = 0x62
ACPI: No dock devices found.
input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input3
ACPI: Power Button [PWRF]
[Firmware Bug]: ACPI: No _BQC method, cannot determine initial brightness
acpi device:20: registered as cooling_device0
input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:1f/LNXVIDEO:00/input/input4
thinkpad_acpi: ThinkPad BIOS 6XET47WW (1.30 ), EC 6XHT43WW-1.183000
thinkpad_acpi: Lenovo ThinkPad X100e, model 2876W1U
thinkpad_acpi: detected a 8-level brightness capable ThinkPad
thinkpad_acpi: possible tablet mode switch found; ThinkPad in laptop mode
thinkpad_acpi: asked for hotkey mask 0x040988fc, but firmware forced it to 0x000988fc
Greets,
Peter G.
--
"I do not think the way you think I think."
-- Kai, last of the Brunnen G
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