Ubuntu gives warning and I cannot change brightness of display

Question

When I turn on my laptop(Hp Victus 15) ubuntu gives warning before entering to system like this

0.2872551 ACPI BIOS Error (bug): Could not resolue symbol E_SB.PCI0.28.ECO
1, AE _NOT_FOUND (20221020/dsw load2-162)
0.2872751 ACPI Error: AE_NOT_FOUND, During nane lookup/catalog (20221020/ps ob.ject-220)
0.7801461 and _gpio AMDI0030:00: Invalid config paran 0014
0.780174] and gpio AMD10030:00: Invalid config paran 0014
0.780195] and_gpio AMD10030:00: Invalid config param 0014
0.7802161 and _gpio AND10030:00: Invalid config paran 0014
0.7802361 and _gpio AMDI0030:00: Invalid config paran 0014
0.7802571 and _gpio AMD10030:00: Invalid config paran 0014
0.780277] and gpio AMDI0030:00: Invalid config paran 0014
0.7803021 and gpio AMDI0030:00: Invalid config paran 0014
0.7803221 and _gpio AMDI0030:00: Invalid config param 0014
1.4819881 and gpio AMD10030:00: Invalid config param 0014
1.4820221 and gpio AMDI0030:00: Invalid config paran 0001

And I cannot change brightness of display, i have two video adapters(video chip of processor and gtx 1650) and i have to monitors but i cannot change in my laptop's display I use NVIDIA driver metapackage from nvidea driver 535 (proprietary, tested) in additional drivers

score 0 · Answer 1 · answered Dec 07 '23 at 16:23

The messages you're seeing during start-up are really more FYIs than anything going critically wrong:

The amd_gpio errors are really internal debug messages that ended up getting shown unintentionally, and will be switched back in a later Linux kernel edition
The ACPI errors are things that the computer's built-in BIOS essentially doesn't do that the Linux kernel expects, so some power management functions might not work exactly as intended

As far as brightness goes, given you have an HP laptop with dual AMD+Nvidia graphics as I do, the same instructions for directing the brightness control using a kernel parameter should work here as well - make sure when doing so that there are not other backlight-related kernel parameters, like acpi_backlight, in place at the same time:

Follow the instructions on this page: https://wiki.ubuntu.com/Kernel/KernelBootParameters to add the following kernel parameter: amdgpu.backlight=0
For reference, after completing that process (the Permanent version at the bottom of the page), there is a line in my /etc/default/grub file that reads:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash amdgpu.backlight=0"

Hope this helps.

Ubuntu gives warning and I cannot change brightness of display

1 Answers1