I have also sent the email to intel-...@lists.freedesktop.org I got a reply from Jani Nikula as per below:
"A bisect result on upstream kernel pointing at the regression might be useful... although we've changed the code considerably since 3.14." And from Daniel Vetter as per below. "Yeah, if the bug still persists on latest upstream kernels then a bisect between 3.11 and 3.10 should be enlightening." The problem is that I don't know how to "bisect" the kernels. I don't even know what it means. I am no linux super user. I am just experienced up to a certain level. The things I am asked to do become more and more complicated and I cannot keep up, I am sorry. Could you forward the above bug report to whoever you feel is more appropriate? I really hope that developers already have enough info to find the culprit. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1229591 Title: 8086:0116 [Dell Inspiron 14z (N411z)] Display brightness keys don't generate evdev events after saucy upgrade Status in “linux” package in Ubuntu: Triaged Bug description: On raring (and precise) the display brightness keys (fn+f4 and fn+f5) on my Dell Inspiron 14z turned the brightness up and down. After a saucy upgrade this no longer happens (I don't see the popup brightness bubble either). The other, similar keys (volume adjustment, etc) still work fine. Changing the values in /sys/class/backlight/intel_backlight/brightness works (temporarily - it gets reset after the screen lock kicks in) I tried following the instructions in https://wiki.ubuntu.com/Hotkeys/Troubleshooting but this appears to be out of date (it references /usr/share/doc/udev/README.keymap.txt which does not exist) Ubuntu kernel version bisect revealed: First bad Ubuntu kernel: 3.11.0-0.2 last good Ubuntu kernel: 3.10.0-6.17 The results of a commit bisect are pending. --- ApportVersion: 2.12.4-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: chris 2646 F.... pulseaudio DistroRelease: Ubuntu 13.10 EcryptfsInUse: Yes InstallationDate: Installed on 2011-11-18 (675 days ago) InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012) MachineType: Dell Inc. Dell System Inspiron N411Z MarkForUpload: True Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-8-generic root=UUID=8bcbab07-7d4f-4c89-b6db-54aeed6ad1c4 ro quiet splash pcie_aspm=force i915.i915_enable_rc6=1 vt.handoff=7 ProcVersionSignature: Ubuntu 3.11.0-8.15-generic 3.11.1 RelatedPackageVersions: linux-restricted-modules-3.11.0-8-generic N/A linux-backports-modules-3.11.0-8-generic N/A linux-firmware 1.114 Tags: saucy Uname: Linux 3.11.0-8-generic x86_64 UpgradeStatus: Upgraded to saucy on 2013-09-21 (2 days ago) UserGroups: adm admin cdrom davfs2 dialout lpadmin plugdev sambashare dmi.bios.date: 09/10/2012 dmi.bios.vendor: Dell Inc. dmi.bios.version: A06 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: 0P01VP dmi.board.vendor: Dell Inc. dmi.board.version: FAB1 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnDellInc.:bvrA06:bd09/10/2012:svnDellInc.:pnDellSystemInspironN411Z:pvr:rvnDellInc.:rn0P01VP:rvrFAB1:cvnDellInc.:ct8:cvr0.1: dmi.product.name: Dell System Inspiron N411Z dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1229591/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
