Q: 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]. A: I tested with 3.12 kernel and it still didnt work
A: now I'm trying to test with leatest kernel from your comment footnote [0] but last version is not v3.13-rc2 but v3.13-rc3 before restart I received these error messages: ... Error! Bad return status for module build on kernel: 3.13.0-031300rc3-generic (x86_64) Consult /var/lib/dkms/nvidia-319-updates/319.60/build/make.log for more information. ERROR (dkms apport): binary package for nvidia: 331.20 not found Error! Bad return status for module build on kernel: 3.13.0-031300rc3-generic (x86_64) Consult /var/lib/dkms/nvidia/331.20/build/make.log for more information. ... Error! Bad return status for module build on kernel: 3.13.0-031300rc3-generic (x86_64) Consult /var/lib/dkms/nvidia-319-updates/319.60/build/make.log for more information. ERROR (dkms apport): binary package for nvidia: 331.20 not found Error! Bad return status for module build on kernel: 3.13.0-031300rc3-generic (x86_64) Consult /var/lib/dkms/nvidia/331.20/build/make.log for more information. ... make.log is attached. I'll continue if I manage to boot the system after this exercise :) ** Attachment added: "/var/lib/dkms/nvidia/331.20/build/make.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1258058/+attachment/3927704/+files/make.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1258058 Title: Brightness control no effect on screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1258058/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs