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author | Nicolás Reynolds <apoyosis@correo.inta.gob.ar> | 2012-06-28 01:08:06 -0300 |
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committer | Nicolás Reynolds <apoyosis@correo.inta.gob.ar> | 2012-06-28 01:08:06 -0300 |
commit | efd3779d0b698daee3d1620ffa63f66c3cb249e7 (patch) | |
tree | cc005ce0d2509aef0bac3890cb1edbca038c987f /kernels/linux-libre-rt/3.4.4-fix-backlight-regression.patch | |
parent | 93b4e351b297424bea9fb532259036d7a6607672 (diff) | |
parent | 2ecb70b29a4d14ebc72f8ec5f9026d350277b6de (diff) | |
download | abslibre-efd3779d0b698daee3d1620ffa63f66c3cb249e7.tar.gz abslibre-efd3779d0b698daee3d1620ffa63f66c3cb249e7.tar.bz2 abslibre-efd3779d0b698daee3d1620ffa63f66c3cb249e7.zip |
Merge branch 'master' of ssh://gparabola/srv/git/abslibre
Diffstat (limited to 'kernels/linux-libre-rt/3.4.4-fix-backlight-regression.patch')
-rw-r--r-- | kernels/linux-libre-rt/3.4.4-fix-backlight-regression.patch | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/kernels/linux-libre-rt/3.4.4-fix-backlight-regression.patch b/kernels/linux-libre-rt/3.4.4-fix-backlight-regression.patch new file mode 100644 index 000000000..a0cf0b1db --- /dev/null +++ b/kernels/linux-libre-rt/3.4.4-fix-backlight-regression.patch @@ -0,0 +1,38 @@ +Subject: Still use ACPI backlight control if _DOS doesn't exist + +This is a regression introduced by commit +ea9f8856bd6d4ed45885b06a338f7362cd6c60e5 + +https://bugzilla.kernel.org/show_bug.cgi?id=43168 + +Some platforms don't have _DOS control method, but the ACPI +backlight still works. +We do not want to lose the backlight control ability on these platforms. + +CC : Igor Murzov <intergalactic.anonymous@gmail.com> +Signed-off-by: Zhang Rui <rui.zhang@intel.com> +--- + drivers/acpi/video.c | 10 ++++++++-- + 1 file changed, 8 insertions(+), 2 deletions(-) + +Index: rtd3/drivers/acpi/video.c +=================================================================== +--- rtd3.orig/drivers/acpi/video.c ++++ rtd3/drivers/acpi/video.c +@@ -565,8 +565,14 @@ acpi_video_bus_DOS(struct acpi_video_bus + video->dos_setting = arg0.integer.value; + status = acpi_evaluate_object(video->device->handle, "_DOS", + &args, NULL); +- if (ACPI_FAILURE(status)) +- return -EIO; ++ if (ACPI_FAILURE(status)) { ++ /* ++ * some platforms don't have _DOS, but the ACPI ++ * backlight control still works ++ */ ++ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No _DOS\n")); ++ return 0; ++ } + + return 0; + } |