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Message #70515
[Bug 1338063] Re: [Toshiba Portege Z835-ST6N03] Brightness control lost after suspend screen dimmed
As requested I followed the steps in
https://wiki.ubuntu.com/DebuggingKernelSuspend.
Results are:
1. Information from sticker on computer:
Manufacurer: Toshiba
Model: Protege Z835-ST6N03
Part No: PT224U-01W00C
2. Bios is already upgraded to latest version 1.80.
3. Booted in mianline upstream kernel 3.16-rc4. Suspended with pm-trace and awakened successfully.
cat /proc/acpi/wakeup > wakeup result is attached.
4. Resume trace result:
a) Resume succeeded, though LCD brightness controls fail as originally reported.
b) Result of: dmesg > mesg.txt will be attached.
c) Searched dmesg.txt for "Magic number" and got:
.....
[ 0.864274] Magic number: 6:405:689
[ 0.864395] rtc_cmos 00:05: setting system clock to 2014-07-09 15:41:36 UTC (1404920496)
.....
d) Searched dmesg.txt for "hash match"" and got no lines matching search.
e) Not sure whether brightness controls failing counts as "graphics related issue".
So will attach Xorg.0.log and Xorg.0.log.old just in case.
** Attachment added: "wakeup"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1338063/+attachment/4148944/+files/wakeup
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https://bugs.launchpad.net/bugs/1338063
Title:
[Toshiba Portege Z835-ST6N03] Brightness control lost after suspend
screen dimmed
Status in “linux” package in Ubuntu:
Confirmed
Bug description:
Using Ubuntu 14.04. Recently updated to kernel version Ubuntu
3.13.0-30.54-generic 3.13.11.2
I expect brightness of my LCD screen to remain the same and be
controllable after waking from suspend. It doesn't and isn't.
What happens:
Brightness controls fully working after initial boot, both through
function keys and system settings.
After putting computer into suspend and then re-awakening the LCD
screen comes up with lowest brightness in actual appearance but
settings still show the brightness as set at suspend time. Controls
for brightness have become ineffective - they slide the brightness bar
along but make no difference to the actual brightness of the screen.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-30-generic 3.13.0-30.54
ProcVersionSignature: Ubuntu 3.13.0-30.54-generic 3.13.11.2
Uname: Linux 3.13.0-30-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: john 2060 F.... pulseaudio
CurrentDesktop: Unity
Date: Sat Jul 5 18:55:05 2014
InstallationDate: Installed on 2012-06-04 (760 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
MachineType: TOSHIBA PORTEGE Z835
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-30-generic root=UUID=865f4d37-5ceb-4e4a-b59b-032fa8a2c80b ro quiet splash elevator=noop vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.13.0-30-generic N/A
linux-backports-modules-3.13.0-30-generic N/A
linux-firmware 1.127.4
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
SourcePackage: linux
UpgradeStatus: Upgraded to trusty on 2014-04-27 (68 days ago)
dmi.bios.date: 02/08/2012
dmi.bios.vendor: TOSHIBA
dmi.bios.version: Version 1.60
dmi.board.asset.tag: 0000000000
dmi.board.name: Portable PC
dmi.board.vendor: TOSHIBA
dmi.board.version: Version A0
dmi.chassis.asset.tag: 0000000000
dmi.chassis.type: 10
dmi.chassis.vendor: TOSHIBA
dmi.chassis.version: Version 1.0
dmi.modalias: dmi:bvnTOSHIBA:bvrVersion1.60:bd02/08/2012:svnTOSHIBA:pnPORTEGEZ835:pvrPT224U-01W00C:rvnTOSHIBA:rnPortablePC:rvrVersionA0:cvnTOSHIBA:ct10:cvrVersion1.0:
dmi.product.name: PORTEGE Z835
dmi.product.version: PT224U-01W00C
dmi.sys.vendor: TOSHIBA
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References