nouveau: w520 dock station: link training failed

nouveau: w520 dock station: link training failed

[Ricardo Ribalda Delgado]

Hi

I am trying to use a external monitor connected via display port to
the dock station of a w520. Unfortunately nothing is on the screen and
dmesg outputs:

[  520.916021] nouveau E[   PDISP][0000:01:00.0] DP:0006:0344: link
training failed


If I connect it to the DP port on the notebook it works as expected
and the dmesg outputs:
[  562.099298] nouveau E[     DRM] DDC responded, but no EDID for DP-1

I am using Linux pili 3.14-1-amd64 #1 SMP Debian 3.14.12-1
(2014-07-11) x86_64 GNU/Linux

The dock station works perfectly with the proprietary driver from nvidia

Is this a known bug? How can I provide a more detailed bug report?


Regards!

-- 
Ricardo Ribalda

Re: nouveau: w520 dock station: link training failed

[Ilia Mirkin]

On Wed, Jul 16, 2014 at 7:30 AM, Ricardo Ribalda Delgado
<ricardo.ribalda@gmail.com> wrote:
> Hi
>
> I am trying to use a external monitor connected via display port to
> the dock station of a w520. Unfortunately nothing is on the screen and
> dmesg outputs:
>
> [  520.916021] nouveau E[   PDISP][0000:01:00.0] DP:0006:0344: link
> training failed
>
>
> If I connect it to the DP port on the notebook it works as expected
> and the dmesg outputs:
> [  562.099298] nouveau E[     DRM] DDC responded, but no EDID for DP-1
>
> I am using Linux pili 3.14-1-amd64 #1 SMP Debian 3.14.12-1
> (2014-07-11) x86_64 GNU/Linux
>
> The dock station works perfectly with the proprietary driver from nvidia
>
> Is this a known bug? How can I provide a more detailed bug report?

Please give 3.16-rc5 a shot. A considerable amount of rework has gone
into 3.16 for DP support on nouveau. If you're still having issues,
take a look at http://nouveau.freedesktop.org/wiki/Bugs/ for
information on filing bugs.

  -ilia

Re: nouveau: w520 dock station: link training failed

[Ricardo Ribalda Delgado]

Hello LLia do you have any way of building new drivers into old kernel
trees like the media-build?

http://git.linuxtv.org/cgit.cgi/media_build.git/tree/README

Thanks

On Wed, Jul 16, 2014 at 2:12 PM, Ilia Mirkin <imirkin@alum.mit.edu> wrote:
> On Wed, Jul 16, 2014 at 7:30 AM, Ricardo Ribalda Delgado
> <ricardo.ribalda@gmail.com> wrote:
>> Hi
>>
>> I am trying to use a external monitor connected via display port to
>> the dock station of a w520. Unfortunately nothing is on the screen and
>> dmesg outputs:
>>
>> [  520.916021] nouveau E[   PDISP][0000:01:00.0] DP:0006:0344: link
>> training failed
>>
>>
>> If I connect it to the DP port on the notebook it works as expected
>> and the dmesg outputs:
>> [  562.099298] nouveau E[     DRM] DDC responded, but no EDID for DP-1
>>
>> I am using Linux pili 3.14-1-amd64 #1 SMP Debian 3.14.12-1
>> (2014-07-11) x86_64 GNU/Linux
>>
>> The dock station works perfectly with the proprietary driver from nvidia
>>
>> Is this a known bug? How can I provide a more detailed bug report?
>
> Please give 3.16-rc5 a shot. A considerable amount of rework has gone
> into 3.16 for DP support on nouveau. If you're still having issues,
> take a look at http://nouveau.freedesktop.org/wiki/Bugs/ for
> information on filing bugs.
>
>   -ilia



-- 
Ricardo Ribalda

Re: nouveau: w520 dock station: link training failed

[Ilia Mirkin]

On Wed, Jul 16, 2014 at 8:22 AM, Ricardo Ribalda Delgado
<ricardo.ribalda@gmail.com> wrote:
> Hello LLia do you have any way of building new drivers into old kernel
> trees like the media-build?

Nope, sorry. You could try just copying over the drm directory, but
it's unlikely to yield positive results. Just build a fresh kernel.

  -ilia

Re: nouveau: w520 dock station: link training failed

[Maarten Lankhorst]

op 16-07-14 15:00, Ilia Mirkin schreef:
> On Wed, Jul 16, 2014 at 8:22 AM, Ricardo Ribalda Delgado
> <ricardo.ribalda@gmail.com> wrote:
>> Hello LLia do you have any way of building new drivers into old kernel
>> trees like the media-build?
> Nope, sorry. You could try just copying over the drm directory, but
> it's unlikely to yield positive results. Just build a fresh kernel.
>
There's https://backports.wiki.kernel.org/index.php/Main_Page ;-)

But it's a nasty piece of work, just use a newer kernel please.

Re: nouveau: w520 dock station: link training failed

[Ricardo Ribalda Delgado]

I have tried with .16-rc5 from linus tree.

After installing and restarting: Exactly the same behaviour: dmesg
complains about link error.... and about 10 secs later whole system
crash :S

So I power cycle the machine and everything works perfectly. Both
connectors, notebook and dock.  :)

I could try to replicate the error if you are interested.

Is there any plans to backport whatever fixed this issue to Long Term
Support kernel tree?

Thanks!




On Wed, Jul 16, 2014 at 3:33 PM, Maarten Lankhorst
<maarten.lankhorst@canonical.com> wrote:
> op 16-07-14 15:00, Ilia Mirkin schreef:
>> On Wed, Jul 16, 2014 at 8:22 AM, Ricardo Ribalda Delgado
>> <ricardo.ribalda@gmail.com> wrote:
>>> Hello LLia do you have any way of building new drivers into old kernel
>>> trees like the media-build?
>> Nope, sorry. You could try just copying over the drm directory, but
>> it's unlikely to yield positive results. Just build a fresh kernel.
>>
> There's https://backports.wiki.kernel.org/index.php/Main_Page ;-)
>
> But it's a nasty piece of work, just use a newer kernel please.
>



-- 
Ricardo Ribalda

Re: nouveau: w520 dock station: link training failed

[Ilia Mirkin]

On Wed, Jul 16, 2014 at 10:18 AM, Ricardo Ribalda Delgado
<ricardo.ribalda@gmail.com> wrote:
> I have tried with .16-rc5 from linus tree.
>
> After installing and restarting: Exactly the same behaviour: dmesg
> complains about link error.... and about 10 secs later whole system
> crash :S
>
> So I power cycle the machine and everything works perfectly. Both
> connectors, notebook and dock.  :)
>
> I could try to replicate the error if you are interested.

If it happens again, please try to record the messages and file a bug.
It might have been some sort of "warm" state left over from
less-than-perfect drivers that will never happen again in practice. Or
perhaps you accidentally booted the wrong kernel the first time
around.

>
> Is there any plans to backport whatever fixed this issue to Long Term
> Support kernel tree?

Certainly not in mainline -- the changes were substantial, and only
small fixes get backported in normal stable trees. Questions about
what a distro might do should be brought up with that distro.

Cheers,

  -ilia

>
> Thanks!
>
>
>
>
> On Wed, Jul 16, 2014 at 3:33 PM, Maarten Lankhorst
> <maarten.lankhorst@canonical.com> wrote:
>> op 16-07-14 15:00, Ilia Mirkin schreef:
>>> On Wed, Jul 16, 2014 at 8:22 AM, Ricardo Ribalda Delgado
>>> <ricardo.ribalda@gmail.com> wrote:
>>>> Hello LLia do you have any way of building new drivers into old kernel
>>>> trees like the media-build?
>>> Nope, sorry. You could try just copying over the drm directory, but
>>> it's unlikely to yield positive results. Just build a fresh kernel.
>>>
>> There's https://backports.wiki.kernel.org/index.php/Main_Page ;-)
>>
>> But it's a nasty piece of work, just use a newer kernel please.
>>
>
>
>
> --
> Ricardo Ribalda