Using SSH to get to the system affected by Enter freeze:

mic...@opus:~$ cat /proc/fb 
0 EFI VGA 

Oh yes, its not vesa ;-)... from dmesg:
[    0.871514] Linux agpgart interface v0.103
[    0.871550] efifb: probing for efifb
[    0.871632] efifb: framebuffer at 0xf9000000, mapped to 0xffffc90011100000, 
using 2252k, total 2250k
[    0.871634] efifb: mode is 1920x1200x8, linelength=1920, pages=1
[    0.871636] efifb: scrolling: redraw
[    0.871637] efifb: Truecolor: size=0:8:8:8, shift=0:0:0:0
[    0.871661] fb0: EFI VGA frame buffer device

mic...@opus:~$ status plymouth
plymouth stop/waiting
mic...@opus:~$ status plymouth-splash
plymouth-splash stop/waiting
mic...@opus:~$ ps aw
  PID TTY      STAT   TIME COMMAND
 1282 tty7     Ss+    0:01 /usr/bin/X :0 -nr -verbose -auth 
/var/run/gdm/auth-for-gdm-KuxdtT/database -nolisten tcp vt7
 1343 tty4     Ss+    0:00 /sbin/getty -8 38400 tty4
 1346 tty5     Ss+    0:00 /sbin/getty -8 38400 tty5
 1353 tty2     Ss+    0:00 /sbin/getty -8 38400 tty2
 1356 tty3     Ss+    0:00 /sbin/getty -8 38400 tty3
 1360 tty6     Ss+    0:00 /sbin/getty -8 38400 tty6
 1592 tty1     Ss+    0:00 /sbin/getty -8 38400 tty1
 2098 pts/0    Ss     0:00 -bash
 2129 pts/0    R+     0:00 ps aw

When I press Enter then it looks like something is written to console as
there are some pixels in top left corner changed and every key press
modifies more pixels.

I have tried to boot w/o gfxpayload, but in such case I don't see the
white/blue line during boot and Enter works immediately (tested 3
times).

-- 
Pressing <Enter> causes X to freeze
https://bugs.launchpad.net/bugs/516412
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