Linux Laptop Backlight Fixes On The Way For v6.1, More Testing Encouraged

Written by Michael Larabel in Hardware on 6 November 2022 at 05:09 AM EST. 2 Comments
Last month Red Hat engineer Hans de Goede warned that old and "weird" laptops could see broken backlight controls with the upcoming Linux 6.1 kernel. He issued a call for testing and as a result was provided valuable feedback that led to some new fixes now on the way. But there still is more work ahead and he's requested further testing by Linux laptop users to ensure the reworked backlight handling is in good shape.

On Saturday Hans de Goede blogged about the laptops found to be affected by this backlight brightness code rework and other details from this user testing feedback.

He's also now submitted a set of patches for fixing regressions to the new backlight code for the Linux 6.1 kernel. With that the backlight code should be in good shape for Linux 6.1 at least based on the testing information he's been provided for an assortment of laptops.

But for the Linux 6.2 merge window he's aiming to get more of this backlight refactoring completed without regressing Linux laptop support. So he's issued a second call for testing if you have an older / "weird" laptop you'd like to ensure continues seeing working backlight controls under Linux. The testing amounts to capturing various dumps from sysfs, DMI decode output, ACPI dump, and related information for your laptop(s).
Related News
About The Author
Michael Larabel

Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via

Popular News This Week