>From the log, it looks like is_backlight_combination_mode is evaluated false which contradicts with the topic we are discussed. Regardless of the combination_mode, the log seems to work .. weird.
2011/5/9 Melchior FRANZ <melchior.fr...@gmail.com> > * Joey Lee -- Monday 09 May 2011: > > The following is debug patch, and please add kernel parameter > > drm.debug=0x02 : > > The result is with acpi_osi=Linux: > > > boot phase: > [ 3.310274] [drm:intel_panel_get_backlight], get backlight val = 2890 > [ 3.310280] [drm:intel_panel_get_backlight], get backlight PWM = 2890 > [ 3.310615] [drm:intel_panel_get_backlight], get backlight val = 2890 > [ 3.310617] [drm:intel_panel_get_backlight], get backlight PWM = 2890 > [ 3.310619] [drm:intel_panel_set_backlight], set backlight PWM = 0 > [ 3.310622] [drm:intel_panel_set_backlight], set backlight tmp(1) = > 189401930 > [ 3.310624] [drm:intel_panel_set_backlight], set backlight tmp(2) = > 189399040 > [ 3.310626] [drm:intel_panel_set_backlight], set backlight level = 0 > > [ 3.641522] [drm:intel_panel_set_backlight], set backlight PWM = 2890 > [ 3.641525] [drm:intel_panel_set_backlight], set backlight tmp(1) = > 189399040 > [ 3.641527] [drm:intel_panel_set_backlight], set backlight tmp(2) = > 189399040 > [ 3.641529] [drm:intel_panel_set_backlight], set backlight level = 2890 > > [ 11.410563] video LNXVIDEO:01: Restoring backlight state > > > > brightness up: > [no output] > > > > brightness down: > [ 152.697127] [drm:intel_panel_get_max_backlight], max backlight PWM = > 2890 > [ 152.697136] [drm:intel_panel_set_backlight], set backlight PWM = 283 > [ 152.697141] [drm:intel_panel_set_backlight], set backlight tmp(1) = > 189401930 > [ 152.697146] [drm:intel_panel_set_backlight], set backlight tmp(2) = > 189399040 > [ 152.697150] [drm:intel_panel_set_backlight], set backlight level = 283 > > [ 166.720631] [drm:intel_panel_get_max_backlight], max backlight PWM = > 2890 > [ 166.720640] [drm:intel_panel_set_backlight], set backlight PWM = 578 > [ 166.720645] [drm:intel_panel_set_backlight], set backlight tmp(1) = > 189399323 > [ 166.720649] [drm:intel_panel_set_backlight], set backlight tmp(2) = > 189399040 > [ 166.720654] [drm:intel_panel_set_backlight], set backlight level = 578 > > [ 178.091776] [drm:intel_panel_get_max_backlight], max backlight PWM = > 2890 > [ 178.091784] [drm:intel_panel_set_backlight], set backlight PWM = 861 > [ 178.091789] [drm:intel_panel_set_backlight], set backlight tmp(1) = > 189399618 > [ 178.091793] [drm:intel_panel_set_backlight], set backlight tmp(2) = > 189399040 > [ 178.091797] [drm:intel_panel_set_backlight], set backlight level = 861 > > [ 188.888370] [drm:intel_panel_get_max_backlight], max backlight PWM = > 2890 > [ 188.888379] [drm:intel_panel_set_backlight], set backlight PWM = 1156 > [ 188.888383] [drm:intel_panel_set_backlight], set backlight tmp(1) = > 189399901 > [ 188.888388] [drm:intel_panel_set_backlight], set backlight tmp(2) = > 189399040 > [ 188.888392] [drm:intel_panel_set_backlight], set backlight level = 1156 > > [ 196.411657] [drm:intel_panel_get_max_backlight], max backlight PWM = > 2890 > [ 196.411665] [drm:intel_panel_set_backlight], set backlight PWM = 1439 > [ 196.411670] [drm:intel_panel_set_backlight], set backlight tmp(1) = > 189400196 > [ 196.411674] [drm:intel_panel_set_backlight], set backlight tmp(2) = > 189399040 > [ 196.411678] [drm:intel_panel_set_backlight], set backlight level = 1439 > > [ 201.256229] [drm:intel_panel_get_max_backlight], max backlight PWM = > 2890 > [ 201.256238] [drm:intel_panel_set_backlight], set backlight PWM = 1734 > [ 201.256243] [drm:intel_panel_set_backlight], set backlight tmp(1) = > 189400479 > [ 201.256247] [drm:intel_panel_set_backlight], set backlight tmp(2) = > 189399040 > [ 201.256252] [drm:intel_panel_set_backlight], set backlight level = 1734 > > [ 206.939838] [drm:intel_panel_get_max_backlight], max backlight PWM = > 2890 > [ 206.939846] [drm:intel_panel_set_backlight], set backlight PWM = 2017 > [ 206.939851] [drm:intel_panel_set_backlight], set backlight tmp(1) = > 189400774 > [ 206.939856] [drm:intel_panel_set_backlight], set backlight tmp(2) = > 189399040 > [ 206.939860] [drm:intel_panel_set_backlight], set backlight level = 2017 > > [ 213.779732] [drm:intel_panel_get_max_backlight], max backlight PWM = > 2890 > [ 213.779740] [drm:intel_panel_set_backlight], set backlight PWM = 2312 > [ 213.779744] [drm:intel_panel_set_backlight], set backlight tmp(1) = > 189401057 > [ 213.779749] [drm:intel_panel_set_backlight], set backlight tmp(2) = > 189399040 > [ 213.779753] [drm:intel_panel_set_backlight], set backlight level = 2312 > > [ 222.583806] [drm:intel_panel_get_max_backlight], max backlight PWM = > 2890 > [ 222.583814] [drm:intel_panel_set_backlight], set backlight PWM = 2595 > [ 222.583819] [drm:intel_panel_set_backlight], set backlight tmp(1) = > 189401352 > [ 222.583824] [drm:intel_panel_set_backlight], set backlight tmp(2) = > 189399040 > [ 222.583828] [drm:intel_panel_set_backlight], set backlight level = 2595 > > [ 229.345860] [drm:intel_panel_get_max_backlight], max backlight PWM = > 2890 > [ 229.345870] [drm:intel_panel_set_backlight], set backlight PWM = 2595 > [ 229.345874] [drm:intel_panel_set_backlight], set backlight tmp(1) = > 189401635 > [ 229.345879] [drm:intel_panel_set_backlight], set backlight tmp(2) = > 189399040 > [ 229.345883] [drm:intel_panel_set_backlight], set backlight level = 2595 > > > > brightness up: > [ 240.594464] [drm:intel_panel_get_max_backlight], max backlight PWM = > 2890 > [ 240.594474] [drm:intel_panel_set_backlight], set backlight PWM = 2312 > [ 240.594479] [drm:intel_panel_set_backlight], set backlight tmp(1) = > 189401635 > [ 240.594483] [drm:intel_panel_set_backlight], set backlight tmp(2) = > 189399040 > [ 240.594487] [drm:intel_panel_set_backlight], set backlight level = 2312 > > [ 240.816722] [drm:intel_panel_get_max_backlight], max backlight PWM = > 2890 > [ 240.816730] [drm:intel_panel_set_backlight], set backlight PWM = 2017 > [ 240.816734] [drm:intel_panel_set_backlight], set backlight tmp(1) = > 189401352 > [ 240.816739] [drm:intel_panel_set_backlight], set backlight tmp(2) = > 189399040 > [ 240.816743] [drm:intel_panel_set_backlight], set backlight level = 2017 > > [ 240.999973] [drm:intel_panel_get_max_backlight], max backlight PWM = > 2890 > [ 240.999981] [drm:intel_panel_set_backlight], set backlight PWM = 1734 > [ 240.999985] [drm:intel_panel_set_backlight], set backlight tmp(1) = > 189401057 > [ 240.999990] [drm:intel_panel_set_backlight], set backlight tmp(2) = > 189399040 > [ 240.999994] [drm:intel_panel_set_backlight], set backlight level = 1734 > > [ 241.212456] [drm:intel_panel_get_max_backlight], max backlight PWM = > 2890 > [ 241.212464] [drm:intel_panel_set_backlight], set backlight PWM = 1439 > [ 241.212469] [drm:intel_panel_set_backlight], set backlight tmp(1) = > 189400774 > [ 241.212473] [drm:intel_panel_set_backlight], set backlight tmp(2) = > 189399040 > [ 241.212478] [drm:intel_panel_set_backlight], set backlight level = 1439 > > [ 241.395611] [drm:intel_panel_get_max_backlight], max backlight PWM = > 2890 > [ 241.395619] [drm:intel_panel_set_backlight], set backlight PWM = 1156 > [ 241.395624] [drm:intel_panel_set_backlight], set backlight tmp(1) = > 189400479 > [ 241.395628] [drm:intel_panel_set_backlight], set backlight tmp(2) = > 189399040 > [ 241.395633] [drm:intel_panel_set_backlight], set backlight level = 1156 > > [ 242.039460] [drm:intel_panel_get_max_backlight], max backlight PWM = > 2890 > [ 242.039470] [drm:intel_panel_set_backlight], set backlight PWM = 283 > [ 242.039475] [drm:intel_panel_set_backlight], set backlight tmp(1) = > 189400196 > [ 242.039479] [drm:intel_panel_set_backlight], set backlight tmp(2) = > 189399040 > [ 242.039484] [drm:intel_panel_set_backlight], set backlight level = 283 > > [ 242.044495] [drm:intel_panel_get_max_backlight], max backlight PWM = > 2890 > [ 242.044502] [drm:intel_panel_set_backlight], set backlight PWM = 283 > [ 242.044507] [drm:intel_panel_set_backlight], set backlight tmp(1) = > 189399323 > [ 242.044511] [drm:intel_panel_set_backlight], set backlight tmp(2) = > 189399040 > [ 242.044515] [drm:intel_panel_set_backlight], set backlight level = 283 > > [ 242.077032] [drm:intel_panel_get_max_backlight], max backlight PWM = > 2890 > [ 242.077038] [drm:intel_panel_set_backlight], set backlight PWM = 0 > [ 242.077043] [drm:intel_panel_set_backlight], set backlight tmp(1) = > 189399323 > [ 242.077047] [drm:intel_panel_set_backlight], set backlight tmp(2) = > 189399040 > [ 242.077052] [drm:intel_panel_set_backlight], set backlight level = 0 > > m. >
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