Hi everyone! I just got a Lenovo Thinkpad T16 Gen 4 with an AMD Ryzen 7 PRO 3500 CPU and an AMD Radeon 860M integrated GPU. After installing Linux Mint 22.1, it runs pretty smoothly, but I'm having a major issue with the display brightness. I can't seem to adjust it; it's stuck at about 80%, which is fine during the day but way too bright at night. Here are some details:
- The function keys Fn + F5/F6 don't work for brightness control, although they function normally when I boot into Windows 11.
- I tried booting into Windows to change the brightness and then back to Linux Mint, but that didn't help at all.
- The battery icon in the taskbar only controls the keyboard backlight and nothing else.
- The brightness and gamma applet is unresponsive.
- I've attempted several fixes, including adding "acpi_backlight=vendor" and "acpi_backlight=native" in the GRUB config, updating GRUB, and trying apps like xbacklight and brightnessctl, but to no avail.
- I monitored journalctl -f for errors when using these apps, but no relevant messages showed up, almost like the system isn't recognizing the function keys.
Is this a hardware compatibility issue with Linux, or is there something I might be missing? I noticed Lenovo didn't offer a Linux installation option for this model, unlike some earlier models of the T16. Any help would be greatly appreciated!
1 Answer
Hey! You might want to try running `sudo lshw` in your terminal to gather more info about your hardware. This can help identify any issues related to hardware compatibility with Linux Mint. If you could share that output, that would be really helpful!
Sure, I can do that! The full output is quite long, though. I will paste it at a log site and share the link.