I'm running Ubuntu 12.04 on my Dell D630 and today updated the kernel to the latest stable release. Previously I was running the latest as provided by Canonical (3.2?). Whilst booting my laptop screen displays at the lowest backlight setting. This also happens if the screen has been locked for some time. Once logged in I can use the keyboard Fn keys to raise the brightness to it's usual lever. Always running on AC. What's happening: Screen brightness is at it's lowest level until I increase it What I expected to happen: Screen brightness stays at maximum whilst on AC power Please me know what I need to attach to this ticket to make it more useful. Thanks, Joseph
joseph@joseph-work:~$ uname -a Linux joseph-work 3.15.0-031500-generic #201406131105 SMP Fri Jun 13 15:26:26 UTC 2014 i686 i686 i386 GNU/Linux joseph@joseph-work:~$ lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (primary) (rev 0c) joseph@joseph-work:~$ sudo lshw -class display [sudo] password for joseph: *-display:0 description: VGA compatible controller product: Mobile GM965/GL960 Integrated Graphics Controller (primary) vendor: Intel Corporation physical id: 2 bus info: pci@0000:00:02.0 version: 0c width: 64 bits clock: 33MHz capabilities: msi pm vga_controller bus_master cap_list rom configuration: driver=i915 latency=0 resources: irq:43 memory:fea00000-feafffff memory:e0000000-efffffff ioport:efe8(size=8) *-display:1 UNCLAIMED description: Display controller product: Mobile GM965/GL960 Integrated Graphics Controller (secondary) vendor: Intel Corporation physical id: 2.1 bus info: pci@0000:00:02.1 version: 0c width: 64 bits clock: 33MHz capabilities: pm bus_master cap_list configuration: latency=0 resources: memory:feb00000-febfffff joseph@joseph-work:~$
Please attach dmesg with drm.debug=0xe module parameter set, from early boot. Please try 3.16 kernel.
iknowjoseph@gmail.com please attach the information requested in comment #2.
Timeout, closing. Please feel free to reopen if the problem persists on recent kernels.