Comment 9 for bug 1499089

Tested on Trusty via the Wily LTS enablement package.

# dpkg -l linux-image-generic-lts-wily
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-================================-=====================-=====================-=====================================================================
ii linux-image-generic-lts-wily 4.2.0.19.14 i386 Generic Linux kernel image

dpkg -l dosemu
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-================================-=====================-=====================-=====================================================================
ii dosemu 1.4.0.7+20130105+b028 i386 DOS Emulator for Linux

This allowed the dosemu 1.4.0 package to start up MS-DOS 6.22

Microsoft(R) MS-DOS(R) Version 6.22
             (C)Copyright Microsoft Corp 1981-1994.

C:\>
C:\>
C:\>dir

 Volume in drive C is mu/drives/c
 Directory of C:\

MSDOS SYS 38,138 05-14-14 7:40p
COMMAND COM 54,645 05-14-14 7:40p
DOSEMU <DIR> 11-12-15 3:51p
IO SYS 40,774 05-14-14 7:40p
        4 file(s) 133,557 bytes
                   2,147,450,880 bytes free

Have you applied the fix
http://git.kernel.org/cgit/linux/kernel/git/tip/tip.git/commit/?id=2459ee8651dc5ab72790c2ffa99af288c7641b64

I'm sure it's needed too?