linux-hardened/Documentation/laptops
Henrique de Moraes Holschuh d7880f10c5 thinkpad-acpi: forbid the use of HBRV on Lenovo ThinkPads
Forcing thinkpad-acpi to do EC-based brightness control (HBRV) on a
X61 has very... interesting effects, instead of doing nothing (since
it doesn't have EC-based backlight control), it causes "weirdness" in
the fan tachometer readings, for example.

This means the EC register that used to be HBRV has been reused by
Lenovo for something else, but they didn't remove it from the DSDT.

Make sure the documentation reflects this data, and forbid the user
from forcing the driver to access HBRV on Lenovo ThinkPads.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-18 01:30:35 -04:00
..
00-INDEX laptops: move laptop-mode.txt to Documentation/laptops/ 2008-03-12 02:37:21 -04:00
acer-wmi.txt acer-wmi: Update copyright notice & documentation 2009-04-04 12:36:31 -04:00
disk-shock-protection.txt ata: Add documentation for hard disk shock protection interface (v3) 2008-10-13 21:39:50 +02:00
laptop-mode.txt laptops: move laptop-mode.txt to Documentation/laptops/ 2008-03-12 02:37:21 -04:00
sony-laptop.txt sony-laptop - Move sony-laptop.txt to Documentation/laptops 2008-02-09 04:15:40 -05:00
sonypi.txt sonypi - Move sonypi.txt to Documentation/laptops 2008-02-09 04:15:53 -05:00
thinkpad-acpi.txt thinkpad-acpi: forbid the use of HBRV on Lenovo ThinkPads 2009-06-18 01:30:35 -04:00