Not sure if this is related to the framebuffer message, but what randomly happened twice is that after resume the display stays black, monitor says that I should verify device connection. As workaround I switch to tty with ctrl+alt+f1 and back to GUI with ctrl+alt+f7, which then presents the graphical login prompt.
** Attachment added: "kern.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/908842/+attachment/2677148/+files/kern.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/908842 Title: Radeon hd 4350 - kern.log: [drm:drm_mode_getfb] *ERROR* invalid framebuffer id To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/908842/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs