Brightness not working nitro 5 kubuntu 22.04

Gaming and Visualization Technologies General Topics and Other SDKs Drivers - Linux, Windows, MacOS
1

hello
acer nitro 5 an515-58
kubuntu 22.04
kernel 6.5.0-15-generic
Intel(R) Core™ i5-12450H
Driver Version: 545.29.06

/sys/clas/backlight/nvidia_wmi_ec_backlight/actual_brightness values are updated but the screen brightness doesn’t change.
there is only nvidia_wmi_ec_backlight in backlight folder.

hwinfo --display
16: PCI 100.0: 0300 VGA compatible controller (VGA)             
  [Created at pci.386]
  Unique ID: VCu0.ijSgy45lYJ7
  Parent ID: vSkL.dIOQ8hw1s4B
  SysFS ID: /devices/pci0000:00/0000:00:01.0/0000:01:00.0
  SysFS BusID: 0000:01:00.0
  Hardware Class: graphics card
  Model: "nVidia VGA compatible controller"
  Vendor: pci 0x10de "nVidia Corporation"
  Device: pci 0x28a0 
  SubVendor: pci 0x1025 "Acer Incorporated [ALI]"
  SubDevice: pci 0x159c 
  Revision: 0xa1
  Driver: "nvidia"
  Driver Modules: "nvidia"
  Memory Range: 0x61000000-0x61ffffff (rw,non-prefetchable)
  Memory Range: 0x6000000000-0x61ffffffff (ro,non-prefetchable)
  Memory Range: 0x6200000000-0x6201ffffff (ro,non-prefetchable)
  I/O Ports: 0x4000-0x407f (rw)
  Memory Range: 0x62080000-0x620fffff (ro,non-prefetchable,disabled)
  IRQ: 181 (2140 events)
  Module Alias: "pci:v000010DEd000028A0sv00001025sd0000159Cbc03sc00i00"
  Driver Info #0:
    Driver Status: nvidiafb is not active
    Driver Activation Cmd: "modprobe nvidiafb"
  Driver Info #1:
    Driver Status: nouveau is not active
    Driver Activation Cmd: "modprobe nouveau"
  Driver Info #2:
    Driver Status: nvidia_drm is active
    Driver Activation Cmd: "modprobe nvidia_drm"
  Driver Info #3:
    Driver Status: nvidia is active
    Driver Activation Cmd: "modprobe nvidia"
  Config Status: cfg=new, avail=yes, need=no, active=unknown
  Attached to: #11 (PCI bridge)

doesnt seems like the regression of https://forums.developer.nvidia.com/t/nvidia-beta-driver-545-23-06-brightness-not-working-changing/270139/17 since the brightness controls dont work on drivers 535 and 525

2

Hi petitminion,

I don’t think I can help much, but reading through the thread you linked and also a somewhat older one Laptop backlight control regression with 465.24.02 this can be related to a number of other reasons as well.

One for example that the integrated graphics on the CPU controls backlight settings instead or similar.

The bug listed in the other thread is marked fixed, but then again it was rather Lenovo specific, so it might be Acer handles backlight control differently.

3

how can we know were this come from ? maybe this help ?
nvidia-bug-report.log.gz (396.8 KB)