Xenial freeze if I plug a second monitor

[Martinx - ジェームズ]

This is clearly a bug... Where should be fill a bug report? Against which
Ubuntu package?

On 7 March 2016 at 13:16, Gérard BIGOT <gerard.bigot at gmail.com> wrote:

> Hi,
>
> I get the same behaviour here. Xenial uptodate. Dell Latitude E6230. Dock
> station, with two screen HP LP2065.
>
> If I boot the laptop on the dock, it freezes on login screen.
>
> I use full disk LUKS, I can enter LUKS Password.
>
> It's a hard freeze, no console access (ctrl+alt+fx doesn't switch).  I get
> just the underscore line of a prompt, not blinking. I never tried if I
> could ssh in.
>
> If boot outside dock (LUKS+lightdm password) , I can dock the laptop after
> boot, the screens light up , and I can start working.
>
> It's a new behaviour of the two last kernels, I guess. Before I could boot
> docked, but I had two use unity-control-center/display in order to sort
> screens out.
>
> Gerard.
>
> 2016-03-07 15:16 GMT+01:00 Martinx - ジェームズ <thiagocmartinsc at gmail.com>:
>
>> On 7 March 2016 at 05:54, Colin Law <clanlaw at gmail.com> wrote:
>>
>>> On 7 March 2016 at 00:01, Martinx - ジェームズ <thiagocmartinsc at gmail.com>
>>> wrote:
>>> > Guys,
>>> >
>>> >  I'm trying to use my second monitor under Xenial (fully upgraded)
>>> but, it
>>> > freezes if I plug the second monitor.
>>> >
>>> >  I'm using it on a brand new Macbook Pro (2015).
>>> >
>>> >  Any thoughts? Is this a know bug?
>>>
>>> There have been bugs in that area but for me it is all working now.
>>> What happens if you boot with the second monitor plugged in?
>>>
>>> Colin
>>>
>>
>> If I boot / power it on, with second monitor already plugged in, it
>> freezes on login screen / lightdm.
>>
>> Thiago
>>
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