saucy mir ppa black screen on notebook Radeon HD 6310

[jerrylamos]

Boots to black screen. Ctrl-Alt-F1 no response. Have to power off.
Boot in recovery mode xrandr says;

jerry@Aspire-5253:~$ xrandr
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 800 x 600, current 1024 x 768, maximum 1024 x 768
default connected primary 1024x768+0+0 0mm x 0mm
   1024x768 0.0*
   800x600 61.0

Runs fine in saucy without mir PPA

Looks like saucy - mir - compositor cannot recognize the normal laptop built-in display at 1366x768.

Attached is tar.gz of
lightdm.log unity-system-compositor.log x-0.log
lightdm.log.old unity-system-compositor.log.old x-0.log.old

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: lightdm 1.7.12-0ubuntu1
ProcVersionSignature: Ubuntu 3.11.0-4.9-generic 3.11.0-rc7
Uname: Linux 3.11.0-4-generic x86_64
ApportVersion: 2.12.1-0ubuntu3
Architecture: amd64
Date: Fri Sep 6 11:46:05 2013
InstallationDate: Installed on 2013-08-31 (6 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130829)
LightdmConfig:
 [SeatDefaults]
 autologin-guest=false
 autologin-user=jerry
 autologin-user-timeout=0
 autologin-session=lightdm-autologin
MarkForUpload: True
SourcePackage: lightdm
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Daniel van Vugt (vanvugt)]

That would be Xmir 1.0 which we no longer develop or support.

Also, Canonical no longer supports Ubuntu 13.10 in general:
   https://wiki.ubuntu.com/Releases

So please upgrade. Although admittedly this bug has been silent for 2.5 years. Just tidying up...