Description of problem: Kernel 2.6.38-0.rc2.git1.3.fc15.x86_64 breaks (all Fedora 38 Builds so far actually) LCD brightness function keys on Acer laptop. This works fine in 2.6.37 Fedora builds. I have not tried a vanilla 2.6.38rc build. Gnome/XFCE both have this problem updates as of today. Version-Release number of selected component (if applicable): Any 2.6.38rc Fedora Kernel How reproducible: Always. 00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07) (prog-if 00 [VGA controller]) Subsystem: Acer Incorporated [ALI] Device 029b Flags: bus master, fast devsel, latency 0, IRQ 43 Memory at d0000000 (64-bit, non-prefetchable) [size=4M] Memory at c0000000 (64-bit, prefetchable) [size=256M] I/O ports at 30d0 [size=8] Expansion ROM at <unassigned> [disabled] Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [d0] Power Management version 3 Kernel driver in use: i915 Kernel modules: i915 00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07) Subsystem: Acer Incorporated [ALI] Device 029b Flags: bus master, fast devsel, latency 0 Memory at d2400000 (64-bit, non-prefetchable) [size=1M] Capabilities: [d0] Power Management version 3 Please see attached dmesg output. Happy to provide any other info or test builds etc.
Created attachment 475306 [details] dmesg dump
Confirming the same: Lenovo G550 with VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 09) Lenovo keys for brightness control don't work, KDE Power Management applet can't set/change the brightness.
Jacek, did kernels < 2.6.38 work OK for you also? Could you please attached dmesg? Thanks
Andy, kernel 2.6.37 was OK with backlight control, it had other problems, but LCD backlight control had been working.
Created attachment 475745 [details] my dmesg dmesg for Lenovo G550
Just tested a vanilla 2.6.38rc3, same problem, filled it upstream also. Upstream tracker listed above.
With 2.6.38-0.rc5.git0.1.fc15.x86_64 LCD backlight control works OK at least on Lenovo G550.