diff options
| author | Henrique de Moraes Holschuh <hmh@hmh.eng.br> | 2009-04-04 00:25:53 -0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2009-04-04 03:14:53 -0400 |
| commit | 0e501834f8c2ba7de2a56e332d346dcf4ac0b593 (patch) | |
| tree | 97aa4223015bbb43ffeced0812b243e42f8ba872 /Documentation/development-process | |
| parent | 74a60c0f828016456fc635feae388ffd12bb3bb9 (diff) | |
thinkpad-acpi: rework brightness support
Refactor and redesign the brightness control backend...
In order to fix bugzilla #11750...
Add a new brightness control mode: support direct NVRAM checkpointing
of the backlight level (i.e. store directly to NVRAM without the need
for UCMS calls), and use that together with the EC-based control.
Disallow UCMS+EC, thus avoiding races with the SMM firmware.
Switch the models that define HBRV (EC Brightness Value) in the DSDT
to the new mode. These are: T40-T43, R50-R52, R50e, R51e, X31-X41.
Change the default for all other IBM ThinkPads to UCMS-only. The
Lenovo models already default to UCMS-only.
Reported-by: Alexey Fisher <bug-track@fisher-privat.net>
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'Documentation/development-process')
0 files changed, 0 insertions, 0 deletions