thinkpad-acpi: fix incorrect use of TPACPI_BRGHT_MODE_ECNVRAM

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HBRV-based default selection of backlight control strategy didn't work
well, at least the X41 defines it but doesn't use it and I don't think
it will stop there.

Switch to a white/blacklist.  All models that have HBRV defined have
been included in the list, and initially all ATI GPUs will get
ECNVRAM, and the Intel GPUs will get UCMS_STEP.

Symptoms of incorrect backlight mode selection are:

1. Non-working backlight control through sysfs;

2. Backlight gets reset to the lowest level at every shutdown, reboot
   and when thinkpad-acpi gets unloaded;

This fixes a regression in 2.6.30, bugzilla #13826

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Reported-by: Tobias Diedrich <ranma+kernel@tdiedrich.de>
Cc: stable@kernel.org
Signed-off-by: Len Brown <len.brown@intel.com>

...

This commit is contained in:

Henrique de Moraes Holschuh 2009-08-01 12:04:20 -03:00 • committed by Len Brown

parent 5b05d4696d

commit 59fe4fe34d

1 changed files with 47 additions and 14 deletions

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drivers/platform/x86/thinkpad_acpi.c

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