After this update, xbacklight is not working on my laptop: the commands xbacklight -inc 1
and xbacklight -dec 1
no longer change screen brightness, even after rebooting. They had been working for months.
Replacing 1 by 10 in the above commands does not solve the issue.
Changing the brightness with the Cinnamon panel works, just as before the update. (I prefer xbacklight because it allows much more precise control of brightness.)
Workaround: I write to /sys/class/backlight/intel_backlight/brightness
, but this requires sudoing.
You can click the command below to see my config.
inxi --admin --verbosity=7 --filter --no-host --width
System:
Kernel: 5.4.142-1-MANJARO x86_64 bits: 64 compiler: gcc v: 11.1.0
parameters: BOOT_IMAGE=/boot/vmlinuz-5.4-x86_64
root=UUID=907cc8ac-d98d-4516-b37b-82a392f7186e ro quiet apparmor=1
security=apparmor resume=UUID=4cc3c850-cb81-4dca-bce4-c33916d25a88
udev.log_priority=3
Desktop: Cinnamon 5.0.5 tk: GTK 3.24.30 vt: 7 dm: LightDM 1.30.0
Distro: Manjaro Linux base: Arch Linux
Machine:
Type: Laptop System: Acer product: Swift SF314-54 v: V1.14 serial: <filter>
Mobo: KBL model: Strongbow_KL_S v: V1.14 serial: <filter> UEFI: Insyde
v: 1.14 date: 03/15/2019
Battery:
ID-1: BAT0 charge: 15.9 Wh (33.9%) condition: 46.9/50.8 Wh (92.4%)
volts: 16.0 min: 15.3 model: SMP-SDI3320 AC14B7K type: Li-ion
serial: <filter> status: Charging
Memory:
RAM: total: 3.73 GiB used: 3.11 GiB (83.4%)
RAM Report: permissions: Unable to run dmidecode. Root privileges required.
CPU:
Info: Dual Core model: Intel Core i3-7020U bits: 64 type: MT MCP
arch: Kaby Lake note: check family: 6 model-id: 8E (142) stepping: A (10)
microcode: EA cache: L2: 3 MiB bogomips: 18406
Speed: 800 MHz min/max: 400/2300 MHz Core speeds (MHz): 1: 800 2: 800 3: 800
4: 800
Flags: 3dnowprefetch abm acpi adx aes aperfmperf apic arat arch_perfmon art
avx avx2 bmi1 bmi2 bts clflush clflushopt cmov constant_tsc cpuid
cpuid_fault cx16 cx8 de ds_cpl dtes64 dtherm dts epb ept ept_ad erms est
f16c flexpriority flush_l1d fma fpu fsgsbase fxsr ht hwp hwp_act_window
hwp_epp hwp_notify ibpb ibrs intel_pt invpcid invpcid_single lahf_lm lm mca
mce md_clear mmx monitor movbe mpx msr mtrr nonstop_tsc nopl nx pae pat pbe
pcid pclmulqdq pdcm pdpe1gb pebs pge pln pni popcnt pse pse36 pti pts rdrand
rdseed rdtscp rep_good sdbg sep smap smep ss ssbd sse sse2 sse4_1 sse4_2
ssse3 stibp syscall tm tm2 tpr_shadow tsc tsc_adjust tsc_deadline_timer vme
vmx vnmi vpid x2apic xgetbv1 xsave xsavec xsaveopt xsaves xtopology xtpr
Vulnerabilities: Type: itlb_multihit status: KVM: Split huge pages
Type: l1tf
mitigation: PTE Inversion; VMX: conditional cache flushes, SMT vulnerable
Type: mds mitigation: Clear CPU buffers; SMT vulnerable
Type: meltdown mitigation: PTI
Type: spec_store_bypass
mitigation: Speculative Store Bypass disabled via prctl and seccomp
Type: spectre_v1
mitigation: usercopy/swapgs barriers and __user pointer sanitization
Type: spectre_v2 mitigation: Full generic retpoline, IBPB: conditional,
IBRS_FW, STIBP: conditional, RSB filling
Type: srbds mitigation: Microcode
Type: tsx_async_abort status: Not affected
Graphics:
Device-1: Intel HD Graphics 620 vendor: Acer Incorporated ALI driver: i915
v: kernel bus-ID: 00:02.0 chip-ID: 8086:5916 class-ID: 0300
Device-2: Chicony HD WebCam type: USB driver: uvcvideo bus-ID: 1-7:3
chip-ID: 04f2:b5c5 class-ID: 0e02 serial: <filter>
Display: x11 server: X.Org 1.20.13 driver: loaded: modesetting
alternate: fbdev,vesa display-ID: :0 screens: 1
Screen-1: 0 s-res: 1920x1080 s-dpi: 96 s-size: 508x285mm (20.0x11.2")
s-diag: 582mm (22.9")
Monitor-1: eDP-1 res: 1920x1080 hz: 60 dpi: 158 size: 309x173mm (12.2x6.8")
diag: 354mm (13.9")
OpenGL: renderer: Mesa Intel HD Graphics 620 (KBL GT2) v: 4.6 Mesa 21.2.1
direct render: Yes
Audio:
Device-1: Intel Sunrise Point-LP HD Audio vendor: Acer Incorporated ALI
driver: snd_hda_intel v: kernel alternate: snd_soc_skl bus-ID: 00:1f.3
chip-ID: 8086:9d71 class-ID: 0401
Sound Server-1: ALSA v: k5.4.142-1-MANJARO running: yes
Sound Server-2: JACK v: 1.9.19 running: no
Sound Server-3: PulseAudio v: 15.0 running: yes
Sound Server-4: PipeWire v: 0.3.33 running: no
Network:
Device-1: Intel Wireless 7265 driver: iwlwifi v: kernel port: 3040
bus-ID: 02:00.0 chip-ID: 8086:095a class-ID: 0280
IF: wlp2s0 state: up mac: <filter>
IP v4: <filter> type: dynamic noprefixroute scope: global
broadcast: <filter>
IP v6: <filter> type: noprefixroute scope: link
WAN IP: <filter>
Bluetooth:
Device-1: Intel Bluetooth wireless interface type: USB driver: btusb v: 0.8
bus-ID: 1-5:2 chip-ID: 8087:0a2a class-ID: e001
Report: rfkill ID: hci0 rfk-id: 2 state: down bt-service: enabled,running
rfk-block: hardware: no software: yes address: see --recommends
Logical:
Message: No logical block device data found.
RAID:
Hardware-1: Intel 82801 Mobile SATA Controller [RAID mode] driver: ahci
v: 3.0 port: 3060 bus-ID: 00:17.0 chip-ID: 8086.282a rev: 21 class-ID: 0104
Drives:
Local Storage: total: 119.24 GiB used: 55.41 GiB (46.5%)
SMART Message: Required tool smartctl not installed. Check --recommends
ID-1: /dev/sda maj-min: 8:0 vendor: SK Hynix model: HFS128G39TND-N210A
size: 119.24 GiB block-size: physical: 4096 B logical: 512 B speed: 6.0 Gb/s
type: SSD serial: <filter> rev: 1P10 scheme: GPT
Message: No optical or floppy data found.
Partition:
ID-1: / raw-size: 38.08 GiB size: 37.23 GiB (97.77%) used: 29.83 GiB (80.1%)
fs: ext4 dev: /dev/sda6 maj-min: 8:6 label: N/A
uuid: 907cc8ac-d98d-4516-b37b-82a392f7186e
ID-2: /boot/efi raw-size: 100 MiB size: 96 MiB (96.00%)
used: 47.9 MiB (49.9%) fs: vfat dev: /dev/sda1 maj-min: 8:1 label: ESP
uuid: 9862-60D5
ID-3: /home raw-size: 36.28 GiB size: 35.46 GiB (97.74%)
used: 25.4 GiB (71.6%) fs: ext4 dev: /dev/sda7 maj-min: 8:7 label: N/A
uuid: fbeba692-668d-4f7f-96b5-c43d6f496a20
Swap:
Kernel: swappiness: 60 (default) cache-pressure: 100 (default)
ID-1: swap-1 type: partition size: 4.7 GiB used: 135.5 MiB (2.8%)
priority: -2 dev: /dev/sda5 maj-min: 8:5 label: swap
uuid: 4cc3c850-cb81-4dca-bce4-c33916d25a88
Unmounted:
ID-1: /dev/sda2 maj-min: 8:2 size: 16 MiB fs: <superuser required>
label: N/A uuid: N/A
ID-2: /dev/sda3 maj-min: 8:3 size: 39.06 GiB fs: ntfs label: Windows
uuid: 547A64897A646A26
ID-3: /dev/sda4 maj-min: 8:4 size: 1024 MiB fs: ntfs label: Recovery
uuid: FCE265B3E26572B6
USB:
Hub-1: 1-0:1 info: Full speed (or root) Hub ports: 12 rev: 2.0
speed: 480 Mb/s chip-ID: 1d6b:0002 class-ID: 0900
Device-1: 1-5:2 info: Intel Bluetooth wireless interface type: Bluetooth
driver: btusb interfaces: 2 rev: 2.0 speed: 12 Mb/s power: 100mA
chip-ID: 8087:0a2a class-ID: e001
Device-2: 1-7:3 info: Chicony HD WebCam type: Video driver: uvcvideo
interfaces: 2 rev: 2.0 speed: 480 Mb/s power: 500mA chip-ID: 04f2:b5c5
class-ID: 0e02 serial: <filter>
Device-3: 1-9:4 info: LighTuning EgisTec Touch Fingerprint Sensor
type: <vendor specific> driver: N/A interfaces: 1 rev: 1.1 speed: 12 Mb/s
power: 100mA chip-ID: 1c7a:0570 class-ID: 0000 serial: <filter>
Hub-2: 2-0:1 info: Full speed (or root) Hub ports: 6 rev: 3.0 speed: 5 Gb/s
chip-ID: 1d6b:0003 class-ID: 0900
Sensors:
System Temperatures: cpu: 43.0 C mobo: 30.0 C
Fan Speeds (RPM): N/A
Info:
Processes: 199 Uptime: 35m wakeups: 1297 Init: systemd v: 248
tool: systemctl Compilers: gcc: 11.1.0 Packages: pacman: 1665 lib: 407
flatpak: 0 Shell: Bash v: 5.1.8 running-in: gnome-terminal inxi: 3.3.06