Happens with the upstream kernel. There is an error that flashes on screen in that moment and is visible for just some parts of a second. I managed to copy it by hand:
drm_run_callback(): pnp_bus_resume+0x0/0x70 returns -19 PM: Device 00:09 failed to resume: error -19 ** Tags added: kernel-bug-exists-upstream ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1101248 Title: [Sony Corporation VPCYB16KG] suspend/resume failure To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1101248/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs