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Message #32012
[Bug 1197482] Re: After suspend/resume, screen is dark for brighness levels below 13 with i915 driver on MacBook Air 6, 2
Linus G Thiel, this bug was reported a while ago and there hasn't been
any activity in it recently. We were wondering if this is still an
issue? If so, could you please test for this with the latest development
release of Ubuntu? ISO images are available from
http://cdimage.ubuntu.com/daily-live/current/ .
If it remains an issue, could you please run the following command in
the development release from a Terminal
(Applications->Accessories->Terminal), as it will automatically gather
and attach updated debug information to this report:
apport-collect -p linux <replace-with-bug-number>
** Description changed:
- After installing Raring on my 2013 MacBook Air 6,2, I find that
- sometimes when resuming from suspend, the screen is dark. I have tracked
- this down to the i915 driver, where the screen brightness can be
- adjusted between levels 0-15. This works correctly after boot, with 0
- being dark and 15 the brightest.
-
- Sometimes after suspend/resume, the screen is equally dark between
- levels 0-12, and seems to be equally bright for levels 13-15
- (brightest). I say sometimes, because it's not every time. It _might_ be
- after the second or third suspend/resume, but I'm not yet sure how to
- repeat it.
-
- When this happens, I have to kill lightum, the backlight/keyboard
- monitoring daemon, and manually set the brightness using the sys
- filesystem:
-
- echo '15' | sudo tee
- /sys/devices/pci0000\:00/0000\:00\:02.0/backlight/acpi_video0/brightness
+ After installing Raring on my 2013 MacBook Air 6,2, I find that sometimes when resuming from suspend, the screen is dark. I have tracked this down to the i915 driver, where the screen brightness can be adjusted between levels 0-15. This works correctly after boot, with 0 being dark and 15 the brightest. Sometimes after suspend/resume, the screen is equally dark between levels 0-12, and seems to be equally bright for levels 13-15 (brightest). I say sometimes, because it's not every time. It _might_ be after the second or third suspend/resume, but I'm not yet sure how to repeat it. When this happens, I have to kill lightum, the backlight/keyboard monitoring daemon, and manually set the brightness using the sys filesystem:
+ echo '15' | sudo tee /sys/devices/pci0000\:00/0000\:00\:02.0/backlight/acpi_video0/brightness
ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: linux-image-3.8.0-25-generic 3.8.0-25.37
ProcVersionSignature: Ubuntu 3.8.0-25.37-generic 3.8.13
Uname: Linux 3.8.0-25-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.9.2-0ubuntu8.1
Architecture: amd64
AudioDevicesInUse:
- USER PID ACCESS COMMAND
- /dev/snd/controlC0: linus 1939 F.... pulseaudio
+ USER PID ACCESS COMMAND
+ /dev/snd/controlC0: linus 1939 F.... pulseaudio
CRDA:
- country SE:
- (2402 - 2482 @ 40), (N/A, 20)
- (5170 - 5250 @ 40), (N/A, 20)
- (5250 - 5330 @ 40), (N/A, 20), DFS
- (5490 - 5710 @ 40), (N/A, 27), DFS
+ country SE:
+ (2402 - 2482 @ 40), (N/A, 20)
+ (5170 - 5250 @ 40), (N/A, 20)
+ (5250 - 5330 @ 40), (N/A, 20), DFS
+ (5490 - 5710 @ 40), (N/A, 27), DFS
Date: Wed Jul 3 19:23:53 2013
HibernationDevice:
- RESUME=/dev/mapper/cryptswap1
- #RESUME=UUID=7625120b-1951-4a58-8da6-1c47db358631
+ RESUME=/dev/mapper/cryptswap1
+ #RESUME=UUID=7625120b-1951-4a58-8da6-1c47db358631
MachineType: Apple Inc. MacBookAir6,2
MarkForUpload: True
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-25-generic root=UUID=2f08800d-d161-46e7-87b6-0f88e86890af ro i915.i915_enable_rc6=3 libata.force=1:noncq resume=/dev/sda4 quiet splash vt.handoff=7
RelatedPackageVersions:
- linux-restricted-modules-3.8.0-25-generic N/A
- linux-backports-modules-3.8.0-25-generic N/A
- linux-firmware 1.106
+ linux-restricted-modules-3.8.0-25-generic N/A
+ linux-backports-modules-3.8.0-25-generic N/A
+ linux-firmware 1.106
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/24/2013
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBA61.88Z.0099.B00.1305241529
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-7DF21CB3ED6977E5
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookAir6,2
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-7DF21CB3ED6977E5
dmi.modalias: dmi:bvnAppleInc.:bvrMBA61.88Z.0099.B00.1305241529:bd05/24/2013:svnAppleInc.:pnMacBookAir6,2:pvr1.0:rvnAppleInc.:rnMac-7DF21CB3ED6977E5:rvrMacBookAir6,2:cvnAppleInc.:ct10:cvrMac-7DF21CB3ED6977E5:
dmi.product.name: MacBookAir6,2
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.
** Summary changed:
- After suspend/resume, screen is dark for brighness levels below 13 with i915 driver on MacBook Air 6,2
+ 8086:0a26 [MacBook Air 6,2] After suspend/resume, screen is dark for brighness levels below 13 with i915 driver
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
--
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https://bugs.launchpad.net/bugs/1197482
Title:
8086:0a26 [MacBook Air 6,2] After suspend/resume, screen is dark for
brighness levels below 13 with i915 driver
Status in “linux” package in Ubuntu:
Incomplete
Bug description:
After installing Raring on my 2013 MacBook Air 6,2, I find that sometimes when resuming from suspend, the screen is dark. I have tracked this down to the i915 driver, where the screen brightness can be adjusted between levels 0-15. This works correctly after boot, with 0 being dark and 15 the brightest. Sometimes after suspend/resume, the screen is equally dark between levels 0-12, and seems to be equally bright for levels 13-15 (brightest). I say sometimes, because it's not every time. It _might_ be after the second or third suspend/resume, but I'm not yet sure how to repeat it. When this happens, I have to kill lightum, the backlight/keyboard monitoring daemon, and manually set the brightness using the sys filesystem:
echo '15' | sudo tee /sys/devices/pci0000\:00/0000\:00\:02.0/backlight/acpi_video0/brightness
ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: linux-image-3.8.0-25-generic 3.8.0-25.37
ProcVersionSignature: Ubuntu 3.8.0-25.37-generic 3.8.13
Uname: Linux 3.8.0-25-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.9.2-0ubuntu8.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: linus 1939 F.... pulseaudio
CRDA:
country SE:
(2402 - 2482 @ 40), (N/A, 20)
(5170 - 5250 @ 40), (N/A, 20)
(5250 - 5330 @ 40), (N/A, 20), DFS
(5490 - 5710 @ 40), (N/A, 27), DFS
Date: Wed Jul 3 19:23:53 2013
HibernationDevice:
RESUME=/dev/mapper/cryptswap1
#RESUME=UUID=7625120b-1951-4a58-8da6-1c47db358631
MachineType: Apple Inc. MacBookAir6,2
MarkForUpload: True
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-25-generic root=UUID=2f08800d-d161-46e7-87b6-0f88e86890af ro i915.i915_enable_rc6=3 libata.force=1:noncq resume=/dev/sda4 quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.8.0-25-generic N/A
linux-backports-modules-3.8.0-25-generic N/A
linux-firmware 1.106
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/24/2013
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBA61.88Z.0099.B00.1305241529
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-7DF21CB3ED6977E5
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookAir6,2
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-7DF21CB3ED6977E5
dmi.modalias: dmi:bvnAppleInc.:bvrMBA61.88Z.0099.B00.1305241529:bd05/24/2013:svnAppleInc.:pnMacBookAir6,2:pvr1.0:rvnAppleInc.:rnMac-7DF21CB3ED6977E5:rvrMacBookAir6,2:cvnAppleInc.:ct10:cvrMac-7DF21CB3ED6977E5:
dmi.product.name: MacBookAir6,2
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.
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