Screen is very dark and brightness cannot be adjusted
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Confirmed
|
Undecided
|
Unassigned |
Bug Description
Device: Dell Precision 7530
In the BIOS, the Switchable Graphics option is deactived, which means only the nVidia GPU is used.
When booting 19.04 beta live USB, the screen becomes very dark and brightness cannot be adjusted. (The same issue happens with 18.04.2)
There is only a "nv_backlight" in /sys/class/
$ ll /sys/class/
total 0
drwxr-xr-x 2 root root 0 Mar 27 09:36 ./
drwxr-xr-x 74 root root 0 Mar 27 09:28 ../
lrwxrwxrwx 1 root root 0 Mar 27 09:28 nv_backlight -> ../../devices/
Trying to manually change brightness doesn't do anything:
$ sudo su
root@ubuntu:
root@ubuntu:
total 0
drwxr-xr-x 3 root root 0 Mar 27 09:28 ./
drwxr-xr-x 4 root root 0 Mar 27 09:28 ../
-r--r--r-- 1 root root 4096 Mar 27 09:37 actual_brightness
-rw-r--r-- 1 root root 4096 Mar 27 09:37 bl_power
-rw-r--r-- 1 root root 4096 Mar 27 09:28 brightness
lrwxrwxrwx 1 root root 0 Mar 27 09:37 device -> ../../card0-eDP-1/
-r--r--r-- 1 root root 4096 Mar 27 09:28 max_brightness
drwxr-xr-x 2 root root 0 Mar 27 09:28 power/
lrwxrwxrwx 1 root root 0 Mar 27 09:28 subsystem -> ../../.
-r--r--r-- 1 root root 4096 Mar 27 09:28 type
-rw-r--r-- 1 root root 4096 Mar 27 09:28 uevent
root@ubuntu:
100
root@ubuntu:
100
root@ubuntu:
100
root@ubuntu:
root@ubuntu:
50
Although the value is changed, the screen brightness doesn't change.
in dmesg, I can see the following:
[ 0.241878] ACPI: Added _OSI(Module Device)
[ 0.241878] ACPI: Added _OSI(Processor Device)
[ 0.241878] ACPI: Added _OSI(3.0 _SCP Extensions)
[ 0.241878] ACPI: Added _OSI(Processor Aggregator Device)
[ 0.241878] ACPI: Added _OSI(Linux-
[ 0.241878] ACPI: Added _OSI(Linux-
[ 0.241878] ACPI: Added _OSI(Linux-
[ 0.286326] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.286332] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.286334] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.286336] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.286339] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.286340] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.287096] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.287099] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.287101] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.287102] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.287105] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.287106] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.287858] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.287861] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.287863] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.287864] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.287867] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.287869] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.288614] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.288617] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.288619] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.288620] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.288623] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.288625] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.289376] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.289379] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.289381] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.289382] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.289385] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.289386] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.290131] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.290134] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.290136] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.290137] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.290140] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.290142] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.290892] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.290895] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.290897] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.290898] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.290900] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.290902] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.291646] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.291649] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.291651] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.291652] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.291654] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.291656] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.292401] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.292404] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.292406] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.292407] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.292410] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.292411] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.293113] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.293117] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.293119] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.293120] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.293122] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.293124] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.293871] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.293874] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.293876] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.293877] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.293880] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.293882] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.294528] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.294531] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.294533] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.294534] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.294537] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.294539] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.295286] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.295289] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.295291] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.295292] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.295295] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.295297] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.296046] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.296049] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.296051] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.296052] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.296055] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.296057] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.296772] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.296776] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.296777] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.296778] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.296781] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.296783] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.296785] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.296788] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.296790] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.296791] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.296793] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.296795] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.296821] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.296824] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.296826] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.296827] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.296830] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.296831] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.296855] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.296858] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.296860] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.296861] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.296864] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.296866] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.296889] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.296892] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.296894] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.296895] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.296898] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.296900] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.296923] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.296926] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.296928] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.296929] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.296932] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.296934] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.296957] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.296960] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.296962] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.296963] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.296966] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.296968] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.296991] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.296994] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.296996] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.296997] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.297000] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.297002] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.297025] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.297028] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.297030] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.297031] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.297034] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.297036] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.297060] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.297063] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.297064] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.297065] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.297068] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.297070] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.297094] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.297097] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.297098] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.297099] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.297102] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.297104] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.297128] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.297131] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.297133] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.297134] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.297136] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.297138] ACPI: Skipping parse of AML opcode: Method (0x0014)
[ 0.297140] ACPI BIOS Error (bug): Failure creating [\_SB.PCI0.
[ 0.297143] ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181213/
[ 0.297145] ACPI: Skipping parse of AML opcode: Device (0x5B82)
[ 0.301048] ACPI: 13 ACPI AML tables successfully acquired and loaded
[ 0.312924] ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored
ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: xorg 1:7.7+19ubuntu12
ProcVersionSign
Uname: Linux 5.0.0-7-generic x86_64
ApportVersion: 2.20.10-0ubuntu23
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperVersion: 1.402
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Wed Mar 27 09:29:56 2019
DistUpgraded: Fresh install
DistroCodename: disco
DistroVariant: ubuntu
ExtraDebuggingI
GraphicsCard:
NVIDIA Corporation GP107GLM [Quadro P1000 Mobile] [10de:1cbb] (rev a1) (prog-if 00 [VGA controller])
Subsystem: Dell GP107GLM [Quadro P1000 Mobile] [1028:1889]
LiveMediaBuild: Ubuntu 19.04 "Disco Dingo" - Alpha amd64 (20190326.2)
MachineType: Dell Inc. Precision 7530
ProcEnviron:
TERM=xterm-
PATH=(custom, no user)
XDG_RUNTIME_
LANG=C.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/10/2018
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.4.2
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.
dmi.product.family: Precision
dmi.product.name: Precision 7530
dmi.product.sku: 0889
dmi.sys.vendor: Dell Inc.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.97-1
version.
version.
version.
version.
version.
version.
version.
tags: | added: ce-qa-concern |
I tried the same while blacklisting nouveau driver in grub:
$ cat /proc/cmdline /casper/ vmlinuz file=/cdrom/ preseed/ ubuntu. seed boot=casper quiet splash modprobe. blacklist= nouveau ---
BOOT_IMAGE=
This time, I have "acpi_video0" in /sys/class/ backlight, but the result is the same. The screen is very dark.
/sys/class/ backlight/ acpi_video0/ brightness is 100 by default. I can modify this value with
$ sudo su backlight/ acpi_video0/ brightness
# echo 60 > /sys/class/
and the brightness actually changes to something even darker. If I try to set it over 100, I get:
write error: Invalid argument