SOLVED. By removing any acpi options added to the kernel boot parameter lines in GRUB.
update-grub probably not needed but also did apt-get update / upgrade downloaded the 13.10-beta2 amd / catalyst driver from amd. first try at installing failed, it said something about missing packages / files. After investigation it appears apt thought I had the linux- headers-3.2.0.54 installed ok, but when I looked for the missing file - it was no place to be found! I forced apt to reinstall the headers (both generic and all packages) and for good measure the kernel-image: apt-get --reinstall install linux-headers-3.2.0-54 apt-get --reinstall install linux-headers-3.2.0-54-generic apt-get --reinstall install linux-image-3.2.0.54-generic after that I could install the drivers ok from AMD and it WORKS! up/down brightness are back! (after a reboot) I also tested this with the upstream kernel 3.2.50 as suggested near the top of this thread and the drivers installed ok. I can confirm the keys are now working with that version of the kernel too. So, The Lenovo S205, (AMD Radeon HD 6310 Graphics) seems not to work with the generic drives, or AMD's 13.4 drivers. BUT does work ok with the AMD 13.10-beta2 drivers. Home this helps. Derek -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1214752 Title: Lenovo Ideapad S205] Brightness keys do not change brightness after the last update To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1214752/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
