On 11/7/22 16:34, Kamil Paral wrote:
> kernel 6.1 or 6.2 will change how laptop backlight is handled and it might negatively affect some laptops, especially older ones. Hans De Goede, the developer of that change, asks for wider community testing. Here are his blog posts containing all necessary instructions:
> * Part 1: https://hansdegoede.livejournal.com/26427.html <https://hansdegoede.livejournal.com/26427.html>
> * Part 2: https://hansdegoede.livejournal.com/27130.html <https://hansdegoede.livejournal.com/27130.html>
> If you can, please help him identify affected laptops, so that this change can be prepared with a minimum negative impact. All results are to be submitted directly to Hans (not to this list), as described in the blog posts.
Kamil, thank you for bringing this to people's attention.
Note that the most problematic change in 6.1 has already been disabled, so it is no longer necessary to run the tests from the first blog post.
If you want to help test please run the tests from the second blogpost:
which is about trying to re-introduce the 6.1 change in a different form. Note you can run the requested tests with any recent(ish) kernel.
The 6.2 changes will most likely affect only really old laptops (from around 2005), so if possible please run the tests on older laptops.
So far only one laptop is known to be affected by the planned 6.2 changes and that is a laptop from 2003, for which I will add a DMI quirk to avoid that specific model from regressing in 6.2.
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