Bug 116541 - Switching consoles using Ctl-Alt-Fn keys produces a Black screen only.
Summary: Switching consoles using Ctl-Alt-Fn keys produces a Black screen only.
Status: NEW
Alias: None
Product: Other
Classification: Unclassified
Component: Other (show other bugs)
Hardware: x86-64 Linux
: P1 high
Assignee: other_other
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2016-04-16 16:07 UTC by Saptech
Modified: 2016-04-16 16:07 UTC (History)
0 users

See Also:
Kernel Version: kernel 4.4.x
Subsystem:
Regression: No
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Description Saptech 2016-04-16 16:07:10 UTC 
I noticed this behavior when using the Switch-User(dm-tool) feature running Mate DE & LightDM and running kernel 4.4. Running kernel 4.3 does not display this behavior. 

With two or more user accounts created, user1 sign in. If user2 need to login and user1 Switch User, it will bring up the the display manager. User2 can sign in but when user2 Switch User, it returns to a Blank screen. The only way to get out of it is to reboot the system using the power button. This behavior happen using the Ctl-Alt-Fn keys also.

I've noticed this happen with Debian Testing, Archlinux and a few other distros that are running kernel 4.4.

Steps to Reproduce: Create two users, switch consoles between the two users while running kernel 4.4 or higher, it should produce a black screen and only option is to reboot the computer.
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