[Kernel-packages] [Bug 1954843] Re: amdgpu_bl0: Failed to write system 'brightness' attribute: Invalid argument

According to the last comment, this was fixed by upgrading to 22.04. ** Changed in: systemd (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1954

[Kernel-packages] [Bug 1954843] Re: amdgpu_bl0: Failed to write system 'brightness' attribute: Invalid argument

This issue is no longer present in Ubuntu 22.04. Wile using Ubuntu 21.10, the following workarounds also remedied the issue: - Run a mainline 5.15.x kernel from https://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D - Run the Jammy Jellyfish kernel from https://packages.ubuntu.com/jammy/linux-i

[Kernel-packages] [Bug 1954843] Re: amdgpu_bl0: Failed to write system 'brightness' attribute: Invalid argument

Just updated my laptop (Ubuntu 20.04.3 LTS) from 5.13.0-27-generic to 5.13.0-28-generic and have the same issue (stuck in max brightness). On 5.13.0-27-generic, brightness adjust works fine. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to

[Kernel-packages] [Bug 1954843] Re: amdgpu_bl0: Failed to write system 'brightness' attribute: Invalid argument

I compiled several Ubuntu-5.13.0-x.x tags from https://kernel.ubuntu.com/git/ubuntu/ubuntu-impish.git/refs/ but the backlight issue seems to go far back in time. I tested: - Ubuntu-5.13.0-25.26 - Ubuntu-5.13.0-21.21 - Ubuntu-5.13.0-20.20 - Ubuntu-5.13.0-19.19 - Ubuntu-5.13.0-16.16 In Ubuntu-5.13

[Kernel-packages] [Bug 1954843] Re: amdgpu_bl0: Failed to write system 'brightness' attribute: Invalid argument

I just tested signed Ubuntu kernel 5.13.0-28-generic which is in Proposed right now, but it does not fix the issue. Brightness adjustments work, but service fails during startup and screen is at full brightness every boot (at gdm and at GNOME 3 desktop). -- You received this bug notification beca

[Kernel-packages] [Bug 1954843] Re: amdgpu_bl0: Failed to write system 'brightness' attribute: Invalid argument

I tested some mainline 5.13.x kernels from https://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D and was able to find a point release where this issue is resolved. Testing results: Signed Ubuntu kernel 5.13.0-27-generic: brightness adjustments work, but service fails during startup and screen is

[Kernel-packages] [Bug 1954843] Re: amdgpu_bl0: Failed to write system 'brightness' attribute: Invalid argument

Status changed to 'Confirmed' because the bug affects multiple users. ** Changed in: systemd (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1954843

[Kernel-packages] [Bug 1954843] Re: amdgpu_bl0: Failed to write system 'brightness' attribute: Invalid argument

I enabled debug logging for systemd with kernel cmdline: systemd.log_level=debug systemd.log_target=kmsg log_buf_len=1M printk.devkmsg=on New log attached to bug report is the output of 'journalctl -b': systemd-debug.log Filtering on "backlight" and omitting systemd-logind, this portion looks int

[Kernel-packages] [Bug 1954843] Re: amdgpu_bl0: Failed to write system 'brightness' attribute: Invalid argument

** Package changed: xorg (Ubuntu) => linux (Ubuntu) ** Also affects: systemd (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1954843 Ti