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Message #33274
Re: [Bug 1258495] Re: backlight too bright, can't dim it much
Hi there,
Thanks a lot for the reply. Before I tried your suggestions, I got a system problem message, so just to be safe I did a fresh install of Ubuntu 13.10, tested the backlight (still the same issue),
then installed
linux-image-3.12.0-031200-generic_3.12.0-031200.201311031935_i386.deb (as you mentioned v3.12), tested the backlight, no change.
After that I did a fresh install again (no change in the backlight issue) to install
linux-image-3.13.0-031300rc3-generic_3.13.0-031300rc3.201312061335_i386.deb (because you linked to v3.13) but the problem still persists.
In neither versions I could see them being mentioned in the boot menu,
so does this count as 'kernel-unable-to-test-upstream'?
During the boot with the latter version there were two messages, the first one being:
"[ 0.000000] tsc: Fast TSC calibration failed"
I couldn't capture the second message as it was too long and disappeared too quickly (if you really need to know what it said, then I could try to find out anyway, maybe if you could tell me how to freeze the message for long enough?).
Those messages turned from white to yellow font and then Ubuntu booted up fine (well, after some boots the clock and 'shut down' buttons were missing).
Please let me know if I can do anything else to help solve this issue.
Thanks again!
Christine
> Date: Fri, 6 Dec 2013 20:23:09 +0000
> From: joseph.salisbury@xxxxxxxxxxxxx
> To: xmastrees@xxxxxxxxxxx
> Subject: [Bug 1258495] Re: backlight too bright, can't dim it much
>
> Would it be possible for you to test the latest upstream kernel? Refer
> to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
> v3.12 kernel[0].
>
> If this bug is fixed in the mainline kernel, please add the following
> tag 'kernel-fixed-upstream'.
>
> If the mainline kernel does not fix this bug, please add the tag:
> 'kernel-bug-exists-upstream'.
>
> If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
> Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".
>
>
> Thanks in advance.
>
> [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.13-rc3-trusty/
>
>
> ** Changed in: linux (Ubuntu)
> Importance: Undecided => Medium
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1258495
>
> Title:
> backlight too bright, can't dim it much
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1258495/+subscriptions
--
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https://bugs.launchpad.net/bugs/1258495
Title:
backlight too bright, can't dim it much
Status in “linux” package in Ubuntu:
Confirmed
Bug description:
Screen is far too bright, dims only slightly with hotkeys, brightness
control applet ineffective. Tried more than half a dozen solutions
(incl. editing the grub which used to work fine with Ubuntu 12.04) but
none of them worked.
thindi@thindi-AOA110:~$ ls /sys/class/backlight > backlight
thindi@thindi-AOA110:~$ grep -r . /proc/acpi > acpi
grep: /proc/acpi/event: Permission denied
thindi@thindi-AOA110:~$ sudo acpidump -o acpidump.txt
thindi@thindi-AOA110:~$ acpixtract acpidump.txt
Acpi table [DSDT] - 24038 bytes written to DSDT.dat
Acpi table [SSDT] - 1220 bytes written to SSDT.dat
thindi@thindi-AOA110:~$ iasl -d DSDT.dat
Intel ACPI Component Architecture
AML Disassembler version 20100528 [Dec 19 2012]
Copyright (c) 2000 - 2010 Intel Corporation
Supports ACPI Specification Revision 4.0a
Loading Acpi table from file DSDT.dat
Acpi table [DSDT] successfully installed and loaded
Pass 1 parse of [DSDT]
Pass 2 parse of [DSDT]
Parsing Deferred Opcodes (Methods/Buffers/Packages/Regions)
...................................................................................................................................................................................................................................................................................................................................................................
Parsing completed
Disassembly completed, written to "DSDT.dsl"
thindi@thindi-AOA110:~$ sudo fwts > fwts
Test: Gather kernel system information.
Gather kernel signature. 1 info only
Gather kernel system information. 1 info only
Gather kernel boot command line. 1 info only
Gather ACPI driver version. 1 info only
Test: Gather BIOS DMI information.
Gather BIOS DMI information 1 info only
Test: Scan kernel log for Oopses.
Kernel log oops check. 2 passed
Test: Scan kernel log for errors and warnings.
Kernel log error check. 1 passed
Test: MTRR validation.
Validate the kernel MTRR IOMEM setup. 1 failed
Validate the MTRR setup across all processors. 1 passed
Check for AMD MtrrFixDramModEn being cleared by the .. 1 skipped
Test: General ACPI information check.
Determine Kernel ACPI version. 1 info only
Determine machine's ACPI version. 1 info only
Determine AML compiler. 1 info only
Test: Ubuntu UEFI secure boot test.
Test aborted..
Test: Check for UEFI Compatibility Support Module.
Check for UEFI Compatibility Support Module. 1 info only
Test: Checks firmware has set PCI Express MaxReadReq to a higher value on..
Check firmware settings MaxReadReq for PCI Express d.. 1 failed
Test: Check PCI host bridge configuration using _CRS.
Check PCI host bridge configuration using _CRS. 1 skipped
Test: PCIe ASPM check.
PCIe ASPM ACPI test.
PCIe ASPM registers test. 3 passed, 10 warnings
Test: HPET configuration test.
Check HPET base in kernel log.
Check HPET base in HPET table. 1 passed
Check HPET base in DSDT and/or SSDT.
Sanity check HPET configuration.
Test: Test DMI/SMBIOS tables for errors.
Find and Check SMBIOS Table Entry Point. 6 passed
Test DMI/SMBIOS tables for errors. 31 passed, 2 failed
Test: Check if system is using latest microcode.
Check for most recent microcode being loaded.
Test: MSR register tests.
Check CPU generic MSRs. 45 passed, 2 failed
Check CPU specific model MSRs. 20 passed, 1 failed
Check all P State Ratios. 2 passed
Check C1 and C3 autodemotion. 1 passed
Check SMRR MSR registers.
Test: Test if CPU NX is disabled by the BIOS.
Check CPU NX capability. 1 passed
Check all CPUs have same BIOS set NX flag. 1 passed
Check all CPUs have same msr setting in MSR 0x1a0. 1 passed
Test: CPU frequency scaling tests.
CPU P-State Checks. 1 passed
Test: Check max CPU frequencies against max scaling frequency.
Maximum CPU frequency check. 1 passed
Test: Test CPU Virtualisation Configuration.
Check CPU Virtualisation Configuration. 1 skipped
Test: Check BIOS Support Installation structure.
Check PnP BIOS Support Installation structure. 2 passed
Test: Check PCI IRQ Routing Table.
PCI IRQ Routing Table.
Test: OS/2 memory hole test.
Check the OS/2 15Mb memory hole is absent. 1 passed
Test: Check MultiProcessor Tables.
Test skipped..
Test: Check HDA Audio Pin Configs.
Check HDA Audio Pin Configs. 1 passed
Test: Validate EBDA region is mapped and reserved in memory map table.
Check EBDA is reserved in E820 table. 1 passed
Test: Check BIOS32 Service Directory.
Check BIOS32 Service Directory.
Test: APIC Edge/Level Check.
Legacy and PCI Interrupt Edge/Level trigger checks. 1 passed
Test: Extract and analyse Windows Management Instrumentation (WMI).
Check Windows Management Instrumentation 7 passed, 3 failed
Test: Test ACPI Wakealarm.
Check existence of /sys/class/rtc/rtc0/wakealarm. 1 passed
Trigger wakealarm for 1 seconds in the future. 1 passed
Check if wakealarm is fired. 1 passed
Multiple wakealarm firing tests. 1 passed
Test: Re-assemble DSDT and find syntax errors and warnings.
Disassemble and reassemble DSDT 9 failed
Disassemble and reassemble SSDT 1 passed
Test: Processor Clocking Control (PCC) Test.
Check PCCH. 1 info only
Test: Disassemble DSDT to check for _OSI("Linux").
Disassemble DSDT to check for _OSI("Linux"). 2 warnings
Test: ACPI DSDT Method Semantic Tests.
Check Method Names. 1 passed
Check _AEI. 1 skipped
Check _DDN (DOS Device Name). 1 skipped
Check _HID (Hardware ID). 26 passed
Check _HRV (Hardware Revision Number). 1 skipped
Check _PLD (Physical Device Location). 1 skipped
Check _SUB (Subsystem ID). 1 skipped
Check _SUN (Slot User Number). 1 skipped
Check _STR (String). 1 skipped
Check _UID (Unique ID). 10 passed
Check _CRS (Current Resource Settings). 20 passed
Check _DIS (Disable). 8 passed
Check _DMA (Direct Memory Access). 1 skipped
Check _FIX (Fixed Register Resource Provider). 1 skipped
Check _GSB (Global System Interrupt Base). 1 skipped
Check _HPP (Hot Plug Parameters). 1 skipped
Check _PRS (Possible Resource Settings). 8 passed
Check _PXM (Proximity). 1 skipped
Check _EDL (Eject Device List). 1 skipped
Check _EJD (Ejection Dependent Device). 1 skipped
Check _EJ0 (Eject). 1 skipped
Check _EJ1 (Eject). 1 skipped
Check _EJ2 (Eject). 1 skipped
Check _EJ3 (Eject). 1 skipped
Check _EJ4 (Eject). 1 skipped
Check _LCK (Lock). 1 skipped
Check _RMV (Remove). 10 passed
Check _STA (Status). 12 passed
Check _BDN (BIOS Dock Name). 1 skipped
Check _BBN (Base Bus Number). 1 passed
Check _DCK (Dock). 1 skipped
Check _INI (Initialize). 2 passed
Check _SEG (Segment). 1 skipped
Check _OFF (Set resource off). 1 skipped
Check _ON (Set resource on). 1 skipped
Check _DSW (Device Sleep Wake). 1 skipped
Check _IRC (In Rush Current). 1 skipped
Check _PRE (Power Resources for Enumeration). 1 skipped
Check _PR0 (Power Resources for D0). 1 skipped
Check _PR1 (Power Resources for D1). 1 skipped
Check _PR2 (Power Resources for D2). 1 skipped
Check _PR3 (Power Resources for D3). 1 skipped
Check _PS0 (Power State 0). 1 skipped
Check _PS1 (Power State 1). 1 skipped
Check _PS2 (Power State 2). 1 skipped
Check _PS3 (Power State 3). 1 skipped
Check _PSC (Power State Current). 1 skipped
Check _PSE (Power State for Enumeration). 1 skipped
Check _PSW (Power State Wake). 5 passed
Check _S1D (S1 Device State). 1 skipped
Check _S2D (S2 Device State). 1 skipped
Check _S3D (S3 Device State). 1 skipped
Check _S4D (S4 Device State). 1 skipped
Check _S0W (S0 Device Wake State). 1 skipped
Check _S1W (S1 Device Wake State). 1 skipped
Check _S2W (S2 Device Wake State). 1 skipped
Check _S3W (S3 Device Wake State). 1 skipped
Check _S4W (S4 Device Wake State). 1 skipped
Check _S0_ (S0 System State). 1 passed
Check _S1_ (S1 System State). 1 skipped
Check _S2_ (S2 System State). 1 skipped
Check _S3_ (S3 System State). 1 skipped
Check _S4_ (S4 System State). 1 passed
Check _S5_ (S5 System State). 1 passed
Check _SWS (System Wake Source). 1 skipped
Check _PSS (Performance Supported States). 1 skipped
Check _CPC (Continuous Performance Control). 1 skipped
Check _CSD (C State Dependencies). 1 skipped
Check _CST (C States). 1 skipped
Check _PCT (Performance Control). 1 skipped
Check _PDL (P-State Depth Limit). 1 skipped
Check _PPC (Performance Present Capabilities). 1 skipped
Check _PPE (Polling for Platform Error). 1 skipped
Check _TDL (T-State Depth Limit). 1 skipped
Check _TPC (Throttling Present Capabilities). 1 skipped
Check _TSD (Throttling State Dependencies). 1 skipped
Check _TSS (Throttling Supported States). 1 skipped
Check _ALC (Ambient Light Colour Chromaticity). 1 skipped
Check _ALI (Ambient Light Illuminance). 1 skipped
Check _ALT (Ambient Light Temperature). 1 skipped
Check _ALP (Ambient Light Polling). 1 skipped
Check _LID (Lid Status). 1 passed, 1 warnings
Check _GCP (Get Capabilities). 1 skipped
Check _GRT (Get Real Time). 1 skipped
Check _GWS (Get Wake Status). 1 skipped
Check _STP (Set Expired Timer Wake Policy). 1 skipped
Check _STV (Set Timer Value). 1 skipped
Check _TIP (Expired Timer Wake Policy). 1 skipped
Check _TIV (Timer Values). 1 skipped
Check _SBS (Smart Battery Subsystem). 1 skipped
Check _BCT (Battery Charge Time). 1 skipped
Check _BIF (Battery Information). 1 passed, 1 warnings
Check _BIX (Battery Information Extended). 1 skipped
Check _BMA (Battery Measurement Averaging). 1 skipped
Check _BMC (Battery Maintenance Control). 1 skipped
Check _BMD (Battery Maintenance Data). 1 skipped
Check _BMS (Battery Measurement Sampling Time). 1 skipped
Check _BST (Battery Status). 1 passed, 1 warnings
Check _BTP (Battery Trip Point). 1 skipped
Check _BTM (Battery Time). 1 skipped
Check _PCL (Power Consumer List). 1 warnings
Check _PIF (Power Source Information). 1 skipped
Check _PSR (Power Source). 1 passed
Check _FIF (Fan Information). 1 skipped
Check _FSL (Fan Set Level). 1 skipped
Check _FST (Fan Status). 1 skipped
Check _ACx (Active Cooling). 10 skipped
Check _CRT (Critical Trip Point). 1 skipped
Check _DTI (Device Temperature Indication). 1 skipped
Check _HOT (Hot Temperature). 1 skipped
Check _NTT (Notification Temp Threshold). 1 skipped
Check _PSV (Passive Temp). 1 skipped
Check _RTV (Relative Temp Values). 1 skipped
Check _SCP (Set Cooling Policy). 1 skipped
Check _TC1 (Thermal Constant 1). 1 skipped
Check _TC2 (Thermal Constant 2). 1 skipped
Check _TMP (Thermal Zone Current Temp). 1 skipped
Check _TPT (Trip Point Temperature). 1 skipped
Check _TSP (Thermal Sampling Period). 1 skipped
Check _TST (Temperature Sensor Threshold). 1 skipped
Check _TZP (Thermal Zone Polling). 1 skipped
Check _PTS (Prepare to Sleep). 5 failed
Check _TTS (Transition to State). 1 skipped
Check _S0 (System S0 State). 1 skipped
Check _S1 (System S1 State). 1 skipped
Check _S2 (System S2 State). 1 skipped
Check _S3 (System S3 State). 1 skipped
Check _S4 (System S4 State). 1 skipped
Check _S5 (System S5 State). 1 skipped
Check _WAK (System Wake). 5 failed
Check _ADR (Return Unique ID for Device). 45 passed
Check _BCL (Query List of Brightness Control Levels .. 1 skipped
Check _BCM (Set Brightness Level). 1 skipped
Check _BQC (Brightness Query Current Level). 1 skipped
Check _DCS (Return the Status of Output Device). 6 passed
Check _DDC (Return the EDID for this Device). 1 skipped
Check _DSS (Device Set State). 6 passed
Check _DGS (Query Graphics State). 6 passed
Check _DOD (Enumerate All Devices Attached to Displa.. 1 passed
Check _DOS (Enable/Disable Output Switching). 1 passed
Check _GPD (Get POST Device). 1 skipped
Check _ROM (Get ROM Data). 1 passed
Check _SPD (Set POST Device). 1 skipped
Check _VPO (Video POST Options). 1 skipped
Test: MCFG PCI Express* memory mapped config space.
Validate MCFG table. 1 passed
Validate MCFG PCI config space. 1 passed
Test: Simple Fan Tests.
Check fan status. 3 passed
Load system, check CPU fan status.
Test: FADT SCI_EN enabled check.
Check FADT SCI_EN bit is enabled. 3 failed
Test: Check sane DMA Remapping (VT-d).
Check DMA Remapping. 1 skipped
Test: Check processor C state support.
Check all CPUs C-states. 3 passed
Test: Check ACPI table checksum.
Check ACPI table checksums. 13 passed
Test: Check for single instance of APIC/MADT table.
Check single instance of APIC/MADT table. 1 passed
Test: ACPI table settings sanity checks.
Check ACPI tables. 6 passed, 1 failed
thindi@thindi-AOA110:~$ sudo fwts method > fwts_method
Test: ACPI DSDT Method Semantic Tests.
Check Method Names. 1 passed
Check _AEI. 1 skipped
Check _DDN (DOS Device Name). 1 skipped
Check _HID (Hardware ID). 26 passed
Check _HRV (Hardware Revision Number). 1 skipped
Check _PLD (Physical Device Location). 1 skipped
Check _SUB (Subsystem ID). 1 skipped
Check _SUN (Slot User Number). 1 skipped
Check _STR (String). 1 skipped
Check _UID (Unique ID). 10 passed
Check _CRS (Current Resource Settings). 20 passed
Check _DIS (Disable). 8 passed
Check _DMA (Direct Memory Access). 1 skipped
Check _FIX (Fixed Register Resource Provider). 1 skipped
Check _GSB (Global System Interrupt Base). 1 skipped
Check _HPP (Hot Plug Parameters). 1 skipped
Check _PRS (Possible Resource Settings). 8 passed
Check _PXM (Proximity). 1 skipped
Check _EDL (Eject Device List). 1 skipped
Check _EJD (Ejection Dependent Device). 1 skipped
Check _EJ0 (Eject). 1 skipped
Check _EJ1 (Eject). 1 skipped
Check _EJ2 (Eject). 1 skipped
Check _EJ3 (Eject). 1 skipped
Check _EJ4 (Eject). 1 skipped
Check _LCK (Lock). 1 skipped
Check _RMV (Remove). 10 passed
Check _STA (Status). 12 passed
Check _BDN (BIOS Dock Name). 1 skipped
Check _BBN (Base Bus Number). 1 passed
Check _DCK (Dock). 1 skipped
Check _INI (Initialize). 2 passed
Check _SEG (Segment). 1 skipped
Check _OFF (Set resource off). 1 skipped
Check _ON (Set resource on). 1 skipped
Check _DSW (Device Sleep Wake). 1 skipped
Check _IRC (In Rush Current). 1 skipped
Check _PRE (Power Resources for Enumeration). 1 skipped
Check _PR0 (Power Resources for D0). 1 skipped
Check _PR1 (Power Resources for D1). 1 skipped
Check _PR2 (Power Resources for D2). 1 skipped
Check _PR3 (Power Resources for D3). 1 skipped
Check _PS0 (Power State 0). 1 skipped
Check _PS1 (Power State 1). 1 skipped
Check _PS2 (Power State 2). 1 skipped
Check _PS3 (Power State 3). 1 skipped
Check _PSC (Power State Current). 1 skipped
Check _PSE (Power State for Enumeration). 1 skipped
Check _PSW (Power State Wake). 5 passed
Check _S1D (S1 Device State). 1 skipped
Check _S2D (S2 Device State). 1 skipped
Check _S3D (S3 Device State). 1 skipped
Check _S4D (S4 Device State). 1 skipped
Check _S0W (S0 Device Wake State). 1 skipped
Check _S1W (S1 Device Wake State). 1 skipped
Check _S2W (S2 Device Wake State). 1 skipped
Check _S3W (S3 Device Wake State). 1 skipped
Check _S4W (S4 Device Wake State). 1 skipped
Check _S0_ (S0 System State). 1 passed
Check _S1_ (S1 System State). 1 skipped
Check _S2_ (S2 System State). 1 skipped
Check _S3_ (S3 System State). 1 skipped
Check _S4_ (S4 System State). 1 passed
Check _S5_ (S5 System State). 1 passed
Check _SWS (System Wake Source). 1 skipped
Check _PSS (Performance Supported States). 1 skipped
Check _CPC (Continuous Performance Control). 1 skipped
Check _CSD (C State Dependencies). 1 skipped
Check _CST (C States). 1 skipped
Check _PCT (Performance Control). 1 skipped
Check _PDL (P-State Depth Limit). 1 skipped
Check _PPC (Performance Present Capabilities). 1 skipped
Check _PPE (Polling for Platform Error). 1 skipped
Check _TDL (T-State Depth Limit). 1 skipped
Check _TPC (Throttling Present Capabilities). 1 skipped
Check _TSD (Throttling State Dependencies). 1 skipped
Check _TSS (Throttling Supported States). 1 skipped
Check _ALC (Ambient Light Colour Chromaticity). 1 skipped
Check _ALI (Ambient Light Illuminance). 1 skipped
Check _ALT (Ambient Light Temperature). 1 skipped
Check _ALP (Ambient Light Polling). 1 skipped
Check _LID (Lid Status). 1 passed, 1 warnings
Check _GCP (Get Capabilities). 1 skipped
Check _GRT (Get Real Time). 1 skipped
Check _GWS (Get Wake Status). 1 skipped
Check _STP (Set Expired Timer Wake Policy). 1 skipped
Check _STV (Set Timer Value). 1 skipped
Check _TIP (Expired Timer Wake Policy). 1 skipped
Check _TIV (Timer Values). 1 skipped
Check _SBS (Smart Battery Subsystem). 1 skipped
Check _BCT (Battery Charge Time). 1 skipped
Check _BIF (Battery Information). 1 passed, 1 warnings
Check _BIX (Battery Information Extended). 1 skipped
Check _BMA (Battery Measurement Averaging). 1 skipped
Check _BMC (Battery Maintenance Control). 1 skipped
Check _BMD (Battery Maintenance Data). 1 skipped
Check _BMS (Battery Measurement Sampling Time). 1 skipped
Check _BST (Battery Status). 1 passed, 1 warnings
Check _BTP (Battery Trip Point). 1 skipped
Check _BTM (Battery Time). 1 skipped
Check _PCL (Power Consumer List). 1 warnings
Check _PIF (Power Source Information). 1 skipped
Check _PSR (Power Source). 1 passed
Check _FIF (Fan Information). 1 skipped
Check _FSL (Fan Set Level). 1 skipped
Check _FST (Fan Status). 1 skipped
Check _ACx (Active Cooling). 10 skipped
Check _CRT (Critical Trip Point). 1 skipped
Check _DTI (Device Temperature Indication). 1 skipped
Check _HOT (Hot Temperature). 1 skipped
Check _NTT (Notification Temp Threshold). 1 skipped
Check _PSV (Passive Temp). 1 skipped
Check _RTV (Relative Temp Values). 1 skipped
Check _SCP (Set Cooling Policy). 1 skipped
Check _TC1 (Thermal Constant 1). 1 skipped
Check _TC2 (Thermal Constant 2). 1 skipped
Check _TMP (Thermal Zone Current Temp). 1 skipped
Check _TPT (Trip Point Temperature). 1 skipped
Check _TSP (Thermal Sampling Period). 1 skipped
Check _TST (Temperature Sensor Threshold). 1 skipped
Check _TZP (Thermal Zone Polling). 1 skipped
Check _PTS (Prepare to Sleep). 5 failed
Check _TTS (Transition to State). 1 skipped
Check _S0 (System S0 State). 1 skipped
Check _S1 (System S1 State). 1 skipped
Check _S2 (System S2 State). 1 skipped
Check _S3 (System S3 State). 1 skipped
Check _S4 (System S4 State). 1 skipped
Check _S5 (System S5 State). 1 skipped
Check _WAK (System Wake). 5 failed
Check _ADR (Return Unique ID for Device). 45 passed
Check _BCL (Query List of Brightness Control Levels .. 1 skipped
Check _BCM (Set Brightness Level). 1 skipped
Check _BQC (Brightness Query Current Level). 1 skipped
Check _DCS (Return the Status of Output Device). 6 passed
Check _DDC (Return the EDID for this Device). 1 skipped
Check _DSS (Device Set State). 6 passed
Check _DGS (Query Graphics State). 6 passed
Check _DOD (Enumerate All Devices Attached to Displa.. 1 passed
Check _DOS (Enable/Disable Output Switching). 1 passed
Check _GPD (Get POST Device). 1 skipped
Check _ROM (Get ROM Data). 1 passed
Check _SPD (Set POST Device). 1 skipped
Check _VPO (Video POST Options). 1 skipped
thindi@thindi-AOA110:~$ dmesg | grep 'ACPI: Video' > video
thindi@thindi-AOA110:~$ sudo dmidecode > dmidecode.log
thindi@thindi-AOA110:~$ cat /proc/version > version
o "Reboot with only the kernel parameter acpi_backlight=vendor : "
If that means the grub file (excerpt) should look like this:
GRUB_DEFAULT=0
GRUB_HIDDEN_TIMEOUT=0
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="acpi_backlight=vendor"
GRUB_CMDLINE_LINUX=""
o "Make a comment on if you can now alter the backlight with hotkeys or a brightness applet. "
Neither do the job.
Maybe this is also important:
thindi@thindi-AOA110:~$ sudo gedit /etc/default/grub
[sudo] password for thindi:
** (gedit:2082): WARNING **: Could not load Gedit repository: Typelib
file for namespace 'GtkSource', version '3.0' not found
(gedit:2082): IBUS-WARNING **: The owner of
/home/thindi/.config/ibus/bus is not root!
thindi@thindi-AOA110:~$ ls /sys/class/backlight > vendorbacklight
thindi@thindi-AOA110:~$ sudo su
root@thindi-AOA110:/home/thindi# ls -la /sys/class/backlight/intel_backlight/ > lslabacklight
root@thindi-AOA110:/home/thindi# echo 8 > /sys/class/backlight/intel_backlight/brightness
No change after doing that.
o "Reboot with kernel parameter video.use_bios_initial_backlight=0"
Don't know how to do that.
Dealing with the rest on this site https://wiki.ubuntu.com/Kernel/Debugging/Backlight is out of my depth.
Hope the information given helps in any way to fix the bug.
Thanks so very much for dealing with this!
ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: linux-image-3.11.0-14-generic 3.11.0-14.21
ProcVersionSignature: Ubuntu 3.11.0-14.21-generic 3.11.7
Uname: Linux 3.11.0-14-generic i686
ApportVersion: 2.12.5-0ubuntu2.1
Architecture: i386
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: thindi 1586 F.... pulseaudio
/dev/snd/pcmC0D0p: thindi 1586 F...m pulseaudio
Date: Fri Dec 6 11:31:38 2013
HibernationDevice: RESUME=UUID=9793476b-8516-4e8d-b628-0dd0389b1376
InstallationDate: Installed on 2013-12-03 (3 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release i386 (20131016.1)
MachineType: Acer AOA110
MarkForUpload: True
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-14-generic root=UUID=bf6adaec-4e58-4748-95d7-8d287f559046 ro quiet splash pcie_aspm=force acpi_backlight=vendor vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.11.0-14-generic N/A
linux-backports-modules-3.11.0-14-generic N/A
linux-firmware 1.116
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/06/2008
dmi.bios.vendor: Acer
dmi.bios.version: v0.3309
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.vendor: Acer
dmi.board.version: Base Board Version
dmi.chassis.type: 1
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAcer:bvrv0.3309:bd10/06/2008:svnAcer:pnAOA110:pvr1:rvnAcer:rn:rvrBaseBoardVersion:cvnChassisManufacturer:ct1:cvrChassisVersion:
dmi.product.name: AOA110
dmi.product.version: 1
dmi.sys.vendor: Acer
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References
