can't start mir natively - 13.04

Robert Ancell robert.ancell at
Thu Aug 1 16:34:29 UTC 2013

Hi Dariusz,

You should only need Mir to run it beside another X session. You do not
need any of the driver changes which are only required for XMir.

When run successfully, you only see a black screen. You need to run a
client to see anything.

Though, it sounds like you can't VT switch and the Mir server has failed
(as not showing after a ssh in). If it has crashed I'd recommend checking
for a core dump. Core dumps are disabled by default, enable them by running
'ulimit -c unlimited' before running Mir.

If you continue to have problems, file a bug on Make sure to indicate what
hardware you have (from lspci)


On Wed, Jul 31, 2013 at 9:26 PM, Dariusz Gadomski <dgadomski at>wrote:

> Hi,
> I have managed to successfully build mir on my amd64 13.04 and wanted to
> play a bit with the demo server (*Running Mir natively*
> but ended up with a
> black screen.
> I am aware that patched drivers are needed to run X inside Mir but are
> those needed to run it correctly next to a regular X (in a separate VT)? I
> use the xorg-edgers version of xserver-xorg-video-ati drivers and use the
> following command line:
> # mir_demo_server --glog --glog-log-dir /home/darek/logs --vt 1
> --glog-stderrthreshold 0 --display-report log --input-report log
> --msg-processor-report log --session-mediator-report log --glog-minloglevel
> 0
> This ends up with a black screen (my display eventually goes to sleep
> after a couple of seconds).
> In the logs dir there was only a single file and it seem to freeze right
> after starting:
> I was unable to switch VTs (even to my default X session Ctrl+Alt+7).
> After logging in via ssh from a different machine I did not see
> mir_demo_server among the running processes.
> I would appreciate any help with this issue and any hints for a mir-hacker
> wannabe :)
> Thanks,
> Darek
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