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Message #34882
[Bug 1258495] Re: backlight too bright, can't dim it much
Cut from Bug Description.
** Attachment added: "fwts"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1258495/+attachment/3931116/+files/fwts
** Description changed:
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
+ sudo fwts > fwts
+ https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1258495/+attachment/3931116/+files/fwts
+
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 : "
-
+ 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. "
+ 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!
+ Dealing with the rest on this site
+ https://wiki.ubuntu.com/Kernel/Debugging/Backlight is out of my depth.
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
+ 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
+ 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
+ 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
** Tags added: bios-outdated-3310
** Summary changed:
- backlight too bright, can't dim it much
+ 8086:27ae [Acer AOA110] backlight too bright, can't dim it much
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1258495
Title:
8086:27ae [Acer AOA110] backlight too bright, can't dim it much
Status in “linux” package in Ubuntu:
Incomplete
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"
sudo fwts > fwts
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1258495/+attachment/3931116/+files/fwts
thindi@thindi-AOA110:~$ dmesg | grep 'ACPI: Video' > video
thindi@thindi-AOA110:~$ sudo dmidecode > dmidecode.log
thindi@thindi-AOA110:~$ cat /proc/version > version
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=""
Make a comment on if you can now alter the backlight with hotkeys or a brightness applet.
Neither do the job.
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.
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
