Hi there, Thanks a lot for the reply. Before I tried your suggestions, I got a system problem message, so just to be safe I did a fresh install of Ubuntu 13.10, tested the backlight (still the same issue), then installed linux-image-3.12.0-031200-generic_3.12.0-031200.201311031935_i386.deb (as you mentioned v3.12), tested the backlight, no change. After that I did a fresh install again (no change in the backlight issue) to install linux-image-3.13.0-031300rc3-generic_3.13.0-031300rc3.201312061335_i386.deb (because you linked to v3.13) but the problem still persists.
In neither versions I could see them being mentioned in the boot menu, so does this count as 'kernel-unable-to-test-upstream'? During the boot with the latter version there were two messages, the first one being: "[ 0.000000] tsc: Fast TSC calibration failed" I couldn't capture the second message as it was too long and disappeared too quickly (if you really need to know what it said, then I could try to find out anyway, maybe if you could tell me how to freeze the message for long enough?). Those messages turned from white to yellow font and then Ubuntu booted up fine (well, after some boots the clock and 'shut down' buttons were missing). Please let me know if I can do anything else to help solve this issue. Thanks again! Christine > Date: Fri, 6 Dec 2013 20:23:09 +0000 > From: [email protected] > To: [email protected] > Subject: [Bug 1258495] Re: backlight too bright, can't dim it much > > Would it be possible for you to test the latest upstream kernel? Refer > to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest > v3.12 kernel[0]. > > If this bug is fixed in the mainline kernel, please add the following > tag 'kernel-fixed-upstream'. > > If the mainline kernel does not fix this bug, please add the tag: > 'kernel-bug-exists-upstream'. > > If you are unable to test the mainline kernel, for example it will not boot, > please add the tag: 'kernel-unable-to-test-upstream'. > Once testing of the upstream kernel is complete, please mark this bug as > "Confirmed". > > > Thanks in advance. > > [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.13-rc3-trusty/ > > > ** Changed in: linux (Ubuntu) > Importance: Undecided => Medium > > -- > You received this bug notification because you are subscribed to the bug > report. > https://bugs.launchpad.net/bugs/1258495 > > Title: > backlight too bright, can't dim it much > > To manage notifications about this bug go to: > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1258495/+subscriptions -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1258495 Title: backlight too bright, can't dim it much To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1258495/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
