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Here is what is happening in details, in my Ubuntu 14.04 :

I log in as user "A"
Without terminating the session, I switch to user "B"
without terminating the session, i switch back to user "A" and there is a black screen in my monitor for a 3 seconds before start the session.

could you please someone help me with that... Thanks

Pollo
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  • Please, clarify your question. The screen keeps black or simply goes black for 3 second and then logins normally? – 0x2b3bfa0 Mar 17 '15 at 15:02
  • the monitor goes black like if the computer was off, I have to press "enter key" 2 or 3 times to start up the computer again in my session.. – Pollo Mar 17 '15 at 16:36
  • I don't know what can be. However I upvoted the post, I'm sure that somebody can help you to fix it. – 0x2b3bfa0 Mar 17 '15 at 16:46
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    What graphics hardware and driver are you using??? Seems like a graphics issue. (test by pressing [Ctrl][Alt][F1] and then again [Ctrl][Alt][F7] or [Ctrl][Alt][F8] to go back to User A or user B respectively. If that "solves" the problem, it's definitely a hardware issue. @Helio: just cc-ing you... – Fabby Mar 23 '15 at 23:13
  • Thanks.. This is what I have, I tried but still the black screen after switching users.. *-display:0
    description: VGA compatible controller product: 4 Series Chipset Integrated Graphics Controller vendor: Intel Corporation physical id: 2 bus info: pci@0000:00:02.0 version: 03 width: 64 bits clock: 33MHz capabilities: msi pm vga_controller bus_master cap_list rom configuration: driver=i915 latency=0 resources: irq:51 memory:fe800000-febfffff memory:d0000000-dfffffff ioport:ec90(size=8)     – Pollo Mar 24 '15 at 13:23

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