Re: Linux 3.16-rc1: drm:intel_dp_start_link_train *ERROR* too many full retries, give up

From: Jani Nikula <jani.nikula@linux.intel.com>
To: Oliver Hartkopp <socketcan@hartkopp.net>,
	Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: David Airlie <airlied@linux.ie>,
	intel-gfx <intel-gfx@lists.freedesktop.org>
Subject: Re: Linux 3.16-rc1: drm:intel_dp_start_link_train *ERROR* too many full retries, give up
Date: Mon, 30 Jun 2014 11:57:07 +0300	[thread overview]
Message-ID: <87mwcuixlo.fsf@intel.com> (raw)
In-Reply-To: <53AEF021.2050107@hartkopp.net>

On Sat, 28 Jun 2014, Oliver Hartkopp <socketcan@hartkopp.net> wrote:
> Hello Daniel,
>
> just to close my request:
>
> The latest git pull from Linus' tree fixed my issue.
>
> vmlinuz-3.16.0-rc2-00211-gd7933ab (26.6. 21:19) was bad
> vmlinuz-3.16.0-rc2-00319-g3e7b256 (28.6. 09:23) works again
>
> There are two pulls with 'drm-fixes' and 'x86/urgent' in this area.
> Don't know what it was in detail - but it's fixed now (lightdm/xfce4 runs).

Thanks for reporting back, I'm glad it works for you now.

However, for closure, I would appreciate it if you could do a reverse
bisect to find out which commit fixed things for you.

Thanks,
Jani.

>
> Thanks,
> Oliver
>
>
> On 17.06.2014 20:38, Oliver Hartkopp wrote:
>> Hello Daniel,
>> 
>> thanks for your fast reply.
>> 
>> I started the system with drm.debug=0xe with the same effect - therefore I was
>> not able to log in %-(
>> 
>> Btw. when starting into single user mode, I was able to say 'xinit' which
>> produced the borderless xterm at the top left position. So obviously the
>> display is working. Running lightdm from the console in single user mode does
>> not work (dbus missing?). Starting lightdm a second time kills the console.
>> 
>> I think I need to dig into the lightdm and startup stuff.
>> So this might not be an i915 issue. Sorry for the noise.
>> 
>> I'll send an update if I discover any new info ...
>> 
>> Thanks for your support so far,
>> Oliver
>> 
>> On 16.06.2014 23:47, Daniel Vetter wrote:
>>> On Mon, Jun 16, 2014 at 10:08 PM, Oliver Hartkopp
>>> <socketcan@hartkopp.net> wrote:
>>>> Hey all,
>>>>
>>>> with my Debian unstable the upgrade from 3.15 to 3.16-rc1 failed with this fancy
>>>> [drm:intel_dp_start_link_train *ERROR* too many full retries, give up] message loop.
>>>
>>> This message in dmesg and
>>>
>>>> lightdm/XFCE4 doesn't start anymore (it tries several times but fails always).
>>>
>>> xfce not starting shouldn't be related. Are you sure xfce isn't
>>> starting and that it's not just a black screen, but otherwise working
>>> X?
>>>
>>> Please attach complete dmesg with drm.debug=0xe added to your kernel
>>> cmdline and Xorg.log.
>>>
>>> Thanks, Daniel
>>>
>>>> Hm - I just found this stuff in my stock Debian Kernel too:
>>>> 3.14-1-686-pae #1 SMP Debian 3.14.5-1 (2014-06-05) i686 GNU/Linux
>>>>
>>>>
>>>> [    6.461232] [drm:intel_dp_start_link_train] *ERROR* too many full retries, give up
>>>> [    6.873772] dell_wmi: Received unknown WMI event (0x11)
>>>> [    6.884336] Console: switching to colour frame buffer device 240x67
>>>> [    6.948511] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
>>>> [    6.948513] i915 0000:00:02.0: registered panic notifier
>>>>
>>>> [    7.430429] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
>>>>
>>>> But at least it starts with the 3.14 (any the latest 3.15).
>>>>
>>>> I have a Intel(R) Core(TM) i7 CPU M 640  @ 2.80GHz with Intel HD graphics.
>>>>
>>>> Any idea?
>>>>
>>>> Regards,
>>>> Oliver
>>>
>>>
>>>
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-- 
Jani Nikula, Intel Open Source Technology Center