"acpi_osi=Linux" is not useful actually, and i removed it from my grub config. "acpi_backlight=vendor" is required on raring and saucy at least if I want to be able to manage the backlight. Precise and quantal could be affected as well. I have to check to see if the problem as always been there.
As there is a certified version of ubuntu for inspiron 5521 based on 12.04 maybe Canonical could provide information on weither they needed to add some specific patch/configuration to make it work on it. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1214287 Title: [Dell Inspiron 15R 5521] suspend/resume failure To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1214287/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
