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Fix maxium backlight level restored issue 

The origin check for bring back max value for '0'
backlight level is ok for legacy or combo control method
as '0' mostly doesn't act in ideal lowest level. But it
breaks in using kernel control method which should provide
a reasonable backlight range.

This is tested fine on T61 with thinkpad_acpi module.
This commit is contained in:
Zhenyu Wang 2008-12-04 18:43:03 +08:00
parent 32e7d47925
commit 8d7cbab267
1 changed files with 2 additions and 1 deletions
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3
src/i830_lvds.c
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@ -400,7 +400,8 @@ i830SetLVDSPanelPower(xf86OutputPtr output, Bool on)
* they'll always re-maximize the brightness.
*/
if (!(INREG(PP_CONTROL) & POWER_TARGET_ON) &&
dev_priv->backlight_duty_cycle == 0)
dev_priv->backlight_duty_cycle == 0 &&
pI830->backlight_control_method < BCM_KERNEL)
dev_priv->backlight_duty_cycle = dev_priv->backlight_max;
OUTREG(PP_CONTROL, INREG(PP_CONTROL) | POWER_TARGET_ON);