Hello, I would like to report a possible kernel regression affecting the internal display brightness on my Dell Latitude 7390.
After upgrading from Linux kernel 6.14.x to Linux kernel 7.x, the internal display becomes extremely dim immediately after boot. Hardware: Dell Latitude 7390 CPU: Intel Core i7-8650U GPU: Intel UHD Graphics 620 Driver: i915 Working kernel: 6.14.0-29-generic Problematic kernel: 7.x The issue happens on Ubuntu 24.04.4 LTS and Linux Mint 22.2. Booting back into kernel 6.14 restores normal brightness. This appears to be a regression between kernel 6.14 and 7.x, possibly related to Intel i915 backlight handling. I can provide logs if needed. Thank you.
