Thanks Kiran. But you got me into trouble there. the part that you asked me to change was: change GRUB_CMDLINE_LINUX=""acpi_backlight=vendor
but it was shown on the file as: GRUB_CMDLINE_LINUX="" I did the change as you mentioned and then saved it and ran the other command in your list. There was no change at all. So I thought I might do a restart. The system got caught in an endless loop on the Ubuntu loading page. So I used the power button to shut down again. This time around I got the Grub loader page which gave me several options like Ubuntu, Load Ubuntu with advanced settings etc. I had to keep shutting down as the first and second option still did not load Ubuntu. Third time I saw the option to edit settings before loading and used it. I could see the "acpi" sentence in the screen and deleted it. Finally Ubuntu loaded. I went back to the command that you asked me to update and removed it. Is this normal please? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1181512 Title: Cannot adjust screen brightness To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1181512/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
