RHEL6: BUG in con_set_unimap while switching from EFI vga to i915 leads to reboot of system

Issue

• BUG in con_set_unimap while switching from EFI vga to i915 leads to reboot of system
• Rebooting my UEFI system I get the following with one out of ~20 reboots:

[Linux-EFI, setup=0x10ff, size=0x3ecab0]
   [Initrd, addr=0x7e9e0000, size=0x111ceae]
ÿBUG: unable to handle kernel NULL pointer dereference at 0000000000000138
IP: [<ffffffff81343b00>] con_set_unimap+0x30/0x220
PGD 4157fd067 PUD 4157fc067 PMD 0
Oops: 0000 [last sysfs file: /sys/devices/virtual/tty/tty9/uevent
CPU 2
Modules linked in: i915(+) drm_kms_helper drm i2c_algo_bit i2c_core video output dm_mirror dm_region_hash dm_log dm_mod

Pid: 138, comm: setfont Not tainted 2.6.32-431.el6.x86_64 #1 FUJITSU PRIMERGY TX1310 M1/D3219-A1
RIP: 0010:[<ffffffff81343b00>]  [<ffffffff81343b00>] con_set_unimap+0x30/0x220
RSP: 0018:ffff8804157d5cc8  EFLAGS: 00010292
RAX: 00000000fffffffb RBX: ffff880420aa0e00 RCX: 0000000000000888
RDX: 00000000018e7ae0 RSI: 0000000000000222 RDI: ffff880420aa0e00
RBP: ffff8804157d5d38 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000004000000 R12: ffff88041571b800
R13: 00000000018e7ae0 R14: 0000000000000000 R15: 0000000000000001
FS:  00007f7dce23e700(0000) GS:ffff880028300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033