Yeah, after updating to kernel 5.9.8-2 my screen brightness was also fixed on my Dell XPS 13 laptop. 100% brightness when connected to a power supply, and 20% when running on the battery.
Here is my inxi -Fxxz
output:
System:
Kernel: 5.9.8-2-MANJARO x86_64 bits: 64 compiler: gcc v: 10.2.0
Desktop: Xfce 4.14.3 tk: Gtk 3.24.23 wm: xfwm4 dm: LightDM Distro: Manjaro Linux
Machine:
Type: Laptop System: Dell product: XPS 13 9370 v: N/A serial: <filter> Chassis:
type: 10 serial: <filter>
Mobo: Dell model: 0F6P3V v: A00 serial: <filter> UEFI: Dell v: 1.13.1
date: 07/08/2020
Battery:
ID-1: BAT0 charge: 47.1 Wh condition: 50.3/52.0 Wh (97%) volts: 8.3/7.6
model: SMP DELL G8VCF6C serial: <filter> status: Discharging
CPU:
Info: Quad Core model: Intel Core i7-8550U bits: 64 type: MT MCP arch: Kaby Lake
rev: A L2 cache: 8192 KiB
flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 32012
Speed: 900 MHz min/max: 400/4000 MHz Core speeds (MHz): 1: 900 2: 900 3: 900
4: 900 5: 900 6: 900 7: 900 8: 900
Graphics:
Device-1: Intel UHD Graphics 620 vendor: Dell driver: i915 v: kernel
bus ID: 00:02.0 chip ID: 8086:5917
Device-2: Realtek Integrated_Webcam_HD type: USB driver: uvcvideo bus ID: 1-5:3
chip ID: 0bda:58f4
Display: x11 server: X.Org 1.20.9 driver: intel unloaded: modesetting
alternate: fbdev,vesa s-res: 1920x1080 s-dpi: 96
OpenGL: renderer: Mesa Intel UHD Graphics 620 (KBL GT2) v: 4.6 Mesa 20.2.2
direct render: Yes
Audio:
Device-1: Intel Sunrise Point-LP HD Audio vendor: Dell driver: snd_hda_intel
v: kernel bus ID: 00:1f.3 chip ID: 8086:9d71
Sound Server: ALSA v: k5.9.8-2-MANJARO
Network:
Device-1: Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter
vendor: Bigfoot Networks Killer 1435 Wireless-AC driver: ath10k_pci v: kernel
port: f040 bus ID: 02:00.0 chip ID: 168c:003e
IF: wlp2s0 state: down mac: <filter>
Device-2: Realtek RTL8153 Gigabit Ethernet Adapter type: USB driver: r8152
bus ID: 2-1.2.1:5 chip ID: 0bda:8153
IF: enp0s20f0u1u2u1 state: up speed: 1000 Mbps duplex: full mac: <filter>
Drives:
Local Storage: total: 476.94 GiB used: 8.43 GiB (1.8%)
ID-1: /dev/nvme0n1 vendor: Toshiba model: KXG50ZNV512G NVMe 512GB size: 476.94 GiB
speed: 31.6 Gb/s lanes: 4 serial: <filter>
Partition:
ID-1: / size: 451.54 GiB used: 8.43 GiB (1.9%) fs: ext4 dev: /dev/nvme0n1p2
Swap:
ID-1: swap-1 type: partition size: 16.88 GiB used: 0 KiB (0.0%) priority: -2
dev: /dev/nvme0n1p3
Sensors:
System Temperatures: cpu: 33.0 C mobo: 26.0 C sodimm: 27.0 C
Fan Speeds (RPM): cpu: 0
Info:
Processes: 237 Uptime: 2m Memory: 15.34 GiB used: 1.21 GiB (7.9%) Init: systemd
v: 246 Compilers: gcc: N/A Packages: pacman: 975 Shell: Bash v: 5.0.18
running in: alacritty inxi: 3.1.08
And here is my sudo mhwd -li
output:
> Installed PCI configs:
--------------------------------------------------------------------------------
NAME VERSION FREEDRIVER TYPE
--------------------------------------------------------------------------------
video-linux 2018.05.04 true PCI
Warning: No installed USB configs!
And here is my lspci -v
output:
e/DRAM Registers (rev 08)
Subsystem: Dell Device 07e6
Flags: bus master, fast devsel, latency 0
Capabilities: <access denied>
Kernel driver in use: skl_uncore
00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 620 (rev 07) (prog-if 00 [VGA controller])
DeviceName: Onboard IGD
Subsystem: Dell Device 07e6
Flags: bus master, fast devsel, latency 0, IRQ 139
Memory at db000000 (64-bit, non-prefetchable) [size=16M]
Memory at 50000000 (64-bit, prefetchable) [size=256M]
I/O ports at f000 [size=64]
Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
Capabilities: <access denied>
Kernel driver in use: i915
Kernel modules: i915
00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem (rev 08)
Subsystem: Dell Device 07e6
Flags: fast devsel, IRQ 16
Memory at dc420000 (64-bit, non-prefetchable) [size=32K]
Capabilities: <access denied>
Kernel driver in use: proc_thermal
Kernel modules: processor_thermal_device
00:14.0 USB controller: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller (rev 21) (prog-if 30 [XHCI])
Subsystem: Dell Device 07e6
Flags: bus master, medium devsel, latency 0, IRQ 136
Memory at dc410000 (64-bit, non-prefetchable) [size=64K]
Capabilities: <access denied>
Kernel driver in use: xhci_hcd
Kernel modules: xhci_pci
00:14.2 Signal processing controller: Intel Corporation Sunrise Point-LP Thermal subsystem (rev 21)
Subsystem: Dell Device 07e6
Flags: fast devsel, IRQ 18
Memory at dc434000 (64-bit, non-prefetchable) [size=4K]
Capabilities: <access denied>
Kernel driver in use: intel_pch_thermal
Kernel modules: intel_pch_thermal
00:15.0 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #0 (rev 21)
Subsystem: Dell Device 07e6
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at dc433000 (64-bit, non-prefetchable) [size=4K]
Capabilities: <access denied>
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci
00:15.1 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #1 (rev 21)
Subsystem: Dell Device 07e6
Flags: bus master, fast devsel, latency 0, IRQ 17
Memory at dc432000 (64-bit, non-prefetchable) [size=4K]
Capabilities: <access denied>
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci
00:16.0 Communication controller: Intel Corporation Sunrise Point-LP CSME HECI #1 (rev 21)
Subsystem: Dell Device 07e6
Flags: bus master, fast devsel, latency 0, IRQ 137
Memory at dc431000 (64-bit, non-prefetchable) [size=4K]
Capabilities: <access denied>
Kernel driver in use: mei_me
Kernel modules: mei_me
00:1c.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #1 (rev f1) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 122
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: [disabled]
Memory behind bridge: dc300000-dc3fffff [size=1M]
Prefetchable memory behind bridge: [disabled]
Capabilities: <access denied>
Kernel driver in use: pcieport
00:1c.2 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #3 (rev f1) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 123
Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
I/O behind bridge: [disabled]
Memory behind bridge: dc000000-dc1fffff [size=2M]
Prefetchable memory behind bridge: [disabled]
Capabilities: <access denied>
Kernel driver in use: pcieport
00:1c.4 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #5 (rev f1) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 124
Bus: primary=00, secondary=03, subordinate=6d, sec-latency=0
I/O behind bridge: 00002000-00002fff [size=4K]
Memory behind bridge: ac000000-da0fffff [size=737M]
Prefetchable memory behind bridge: 0000000060000000-00000000a9ffffff [size=1184M]
Capabilities: <access denied>
Kernel driver in use: pcieport
00:1d.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #9 (rev f1) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 125
Bus: primary=00, secondary=6e, subordinate=6e, sec-latency=0
I/O behind bridge: [disabled]
Memory behind bridge: dc200000-dc2fffff [size=1M]
Prefetchable memory behind bridge: [disabled]
Capabilities: <access denied>
Kernel driver in use: pcieport
00:1f.0 ISA bridge: Intel Corporation Sunrise Point LPC Controller/eSPI Controller (rev 21)
Subsystem: Dell Device 07e6
Flags: bus master, fast devsel, latency 0
00:1f.2 Memory controller: Intel Corporation Sunrise Point-LP PMC (rev 21)
Subsystem: Dell Device 07e6
Flags: fast devsel
Memory at dc42c000 (32-bit, non-prefetchable) [disabled] [size=16K]
00:1f.3 Audio device: Intel Corporation Sunrise Point-LP HD Audio (rev 21) (prog-if 80)
Subsystem: Dell Device 07e6
Flags: bus master, fast devsel, latency 32, IRQ 140
Memory at dc428000 (64-bit, non-prefetchable) [size=16K]
Memory at dc400000 (64-bit, non-prefetchable) [size=64K]
Capabilities: <access denied>
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel, snd_soc_skl
00:1f.4 SMBus: Intel Corporation Sunrise Point-LP SMBus (rev 21)
Subsystem: Dell Device 07e6
Flags: medium devsel, IRQ 16
Memory at dc430000 (64-bit, non-prefetchable) [size=256]
I/O ports at f040 [size=32]
Kernel driver in use: i801_smbus
Kernel modules: i2c_i801
01:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader (rev 01)
Subsystem: Dell Device 07e6
Flags: bus master, fast devsel, latency 0, IRQ 135
Memory at dc300000 (32-bit, non-prefetchable) [size=4K]
Capabilities: <access denied>
Kernel driver in use: rtsx_pci
Kernel modules: rtsx_pci
02:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter (rev 32)
Subsystem: Bigfoot Networks, Inc. Killer 1435 Wireless-AC
Flags: bus master, fast devsel, latency 0, IRQ 138
Memory at dc000000 (64-bit, non-prefetchable) [size=2M]
Capabilities: <access denied>
Kernel driver in use: ath10k_pci
Kernel modules: ath10k_pci
6e:00.0 Non-Volatile memory controller: Toshiba Corporation Device 0116 (prog-if 02 [NVM Express])
Subsystem: Toshiba Corporation Device 0001
Flags: bus master, fast devsel, latency 0, IRQ 16, NUMA node 0
Memory at dc200000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: nvme
And here is my ls /sys/class/backlight
output:
intel-backlight
Hope this information will be of any help! Currently, the only fix (for now) is simply going back to 5.8.18-1
. Having both 5.8.18-1
and 5.9.8-2
installed keeps the same problem.
If you need even more information, I’ll happily oblige!