On 7/18/2025 9:36 AM, Lauri Tirkkonen wrote:
On Fri, Jul 18 2025 08:10:06 -0500, Mario Limonciello wrote:
Do you by chance have an OLED panel? I believe what's going on is that
userspace is writing zero or near zero and on OLED panels with older kernels
this means non-visible.
Yes, this is an OLED panel. But I don't believe it's userspace writing
anything at this point in the boot; before the bisected commit,
brightness was set to 32 (out of max 255) on this hardware when I
checked from the initramfs rescue shell. At the bisected commit, it's 0
(out of max 255).
There is another commit that fixes the behavior that is probably missing.
Which commit is that? It's not in 6.15.7?
https://github.com/torvalds/linux/commit/39d81457ad3417a98ac826161f9ca0e642677661
No; it's not currently backported. Assuming it helps your issue I think
it's a good argument to backport.
