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I have an ASUS ux303ln with Xubuntu 15.04 that hosts Nvidia 840M. Aiming for longer battery life, I want to use the Intel graphics, so i do

prime-select intel

as root and that's OK.

The problem is when the laptop resumes from sleep - if I am with the Intel driver, the screen is not repainted - it is grey or just the last desktop image - I cannot regain my session and have to restart lightdm or the computer. Tested with Nvidia drivers 340.76, 346.59, 352.21 and noveau.

Anyone has an idea what could cause this?

  • This must be related to intel driver, Nvidia blob is unrelated. And also acpi specifics of your laptop and kernel modules. It is hard to tell. You can report a bug to launchpad. – Pilot6 Jul 22 '15 at 16:45
  • Yeah, I guess, I am wondering if I can do any more tests. It is going to land as a bug, though. – kufeiko Jul 23 '15 at 8:48

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