NVIDIA / NVIDIA/open-gpu-kernel-modules

Backlight problem

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#409 19 comments 14 reactions 0 assignees View on GitHub

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bug
Dominant language
C
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Description

NVIDIA Open GPU Kernel Modules Version

525.53

Does this happen with the proprietary driver (of the same version) as well?

I cannot test this

Operating System and Version

ArchLinux

Kernel Release

5.10.155-1-lts510

Hardware: GPU

GPU 0: NVIDIA GeForce RTX 3060 Laptop GPU (UUID: GPU-405b1dbf-3008-c44f-9f11-0513aaf6746d)

Describe the bug

I tested the latest open source driver and found that the backlight works.

echo 10 > brightness ,the screen is at its brightest

cat max_brightness ,it is 100

To Reproduce

none

Bug Incidence

Always

nvidia-bug-report.log.gz

none

More Info

No response

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the issue on ArchLinux with the NVIDIA open GPU kernel module, kernel 5.10.155-1-lts510, and the listed RTX 3060 Laptop GPU. Inspect the brightness and max_brightness entries and verify how writing 10 affects the screen. Done means brightness values map to the expected screen levels and the behavior is covered by an appropriate regression check.

Written by the indexing model from the issue text.

Assessment

Tech stack
arch-linux, c, linux
Domain
operating-systems
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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