http://bugzilla.kernel.org/show_bug.cgi?id=15096
--- Comment #13 from Rafał Miłecki <zaj...@gmail.com> 2010-01-25 11:54:42 --- I added more debugging messages and have following findings: On booting, acpi_video_device_lcd_set_level is called twice: acpi_video_device_lcd_set_level(f6775840, 100) acpi_video_device_lcd_set_level(f6775840, 100) Each time it loops from state 2 to state 10 (inclusive). Condition: > if (level == device->brightness->levels[state]) is true for state==10 only Condition: > if (device->backlight) is never true. And so we never set props.brightness at boot time. To understand reason you've to track acpi_video_device_find_cap. This function calls "acpi_video_init_brightness" which calls "acpi_video_device_lcd_set_level(device, max_level);" which does not change props.brightness (because we don't have device->backlight). It's later when function acpi_video_device_find_cap does: > device->backlight = backlight_device_register(name, > NULL, device, &acpi_backlight_ops); We should somehow modify this code to call acpi_video_device_lcd_set_level(device, max_level); AFTER registering backlight (class) device. -- Configure bugmail: http://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug. ------------------------------------------------------------------------------ Throughout its 18-year history, RSA Conference consistently attracts the world's best and brightest in the field, creating opportunities for Conference attendees to learn about information security's most important issues through interactions with peers, luminaries and emerging and established companies. http://p.sf.net/sfu/rsaconf-dev2dev _______________________________________________ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
