[LightDM] lightdm fails to stop & can't change login

[Grant]

>> Firstly it depends on what greeter you are using, you will find more
>> information in /var/log/lightdm/lightdm.log and
>> /var/log/lightdm/x-0-greeter.log (please attach here).
>>
>> On 17 August 2012 20:50, Grant <emailgrant at gmail.com> wrote:
>>> I've been using lightdm for about a year now and with all the versions
>>> I've tried, Gentoo prints a message about lightdm and xdm failing to
>>> stop if I reboot from the lightdm menu or the xfce4 menu.  If I issue
>>> 'reboot' as root from an xterm within xfce4, lightdm stops fine.  I
>>> couldn't find anything in the logs, but in which one of syslog-ng's
>>> logs should I look?
>>>
>>> I'm also wonder if there's a way to switch login usernames when I'm
>>> being prompted for a password by lightdm in case I mistyped the
>>> username?
>>>
>>> - Grant
>
> Hi Robert, thanks for writing.  I have:
>
> # ls -l /var/log/lightdm
> total 12
> -rw------- 1 root root 3445 Aug 17 02:50 lightdm.log
> -rw------- 1 root root    0 Aug 17 02:50 x-0-greeter.log
> -rw------- 1 root root    0 Aug 17 02:49 x-0-greeter.log.old
> -rw------- 1 root root  940 Aug 17 02:50 x-0.log
> -rw------- 1 root root 1579 Mar  3 03:06 x-1.log
>
> x-1.log is interesting:
>
> (EE) Failed to load module "vesa" (module does not exist, 0)
> (EE) Failed to load module "fbdev" (module does not exist, 0)
> (EE) intel(0): [drm] failed to set drm interface version.
> (EE) intel(0): Failed to become DRM master.
> DRM_IOCTL_I915_GEM_APERTURE failed: Bad file descriptor
> Assuming 131072kB available aperture size.
> May lead to reduced performance or incorrect rendering.
> get chip id failed: -1 [9]
> param: 4, val: 0
> (EE) intel(0): failed to get resources: Bad file descriptor
> (EE) Screen(s) found, but none have a usable configuration.
>
> I've attached all three.
>
> - Grant

Hi, can anyone point me in the right direction with this?

- Grant