This bug is also discussed on the freedesktop bug tracker:
https://bugs.freedesktop.org/show_bug.cgi?id=88919
It seems to persist in kernel 4.3.
** Bug watch added: freedesktop.org Bugzilla #88919
https://bugs.freedesktop.org/show_bug.cgi?id=88919
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Any updates on this issue? Still happens on 14.04 with 3.19.0-26
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https://bugs.launchpad.net/bugs/1300914
Title:
External screen undetected after first plug
To manage notifications
Are there any news about this issue? I can still observe it with the
newest updates for 14.04.03 (3.16.0-45-generic). Switching to the
greeter does not work for me as well but switching to tty and replugging
the screen seems to do it. Is it probably possible to disable the
counter for too many
Yes, the problem went away with the new DP2VGA converter! I'm plugging
it and the external monitor gets immediately recognized. Sorry for the
noise in this report but I never would have thought that the DP2VGA
adapter would fail in such a strange way.
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I have a DisplayPort output and two adapters. DP to HDMI and DP to VGA.
I have weeks to experience the issue with the DP2HDMI converter but it
happens every time with the DP2VGA converter. I've ordered an other
DP2VGA converter. Let's see.
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The behavior changed and I again checked several kernel versions and
found an important difference:
* 46 shows lightdm greeter (password input) on internal and external
monitor and after starting the session (login) the external monitor is
deactivated but I can reactivate it (switch between
I get the same with HP Elitebook 840, Ubuntu 14.04.02, kernel
3.13.0-52-generic. Each time I plug in the VGA cable of my new Asus screen (no
fitting HDMI cable at home) there is a
[drm:intel_dp_aux_native_read] *ERROR* too many retries, giving up
message in syslog and it is not detected.
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Last week it was still working with a data projector so I do not know
what happened. I can provide more data if requested. Is someone working
on this bug?
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Recently the workaround I previously described stopped working:
logging out of the session and logging in back does not work anymore:
only the lightdm screen becomes visible on the projector, the session
is never visible! (After plugging out the monitor the first time, or
after shutting down the
I searched but I only found an error with different symptoms but the same log
message:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1301398
As it claims that it was fixed in 3.15, I installed 3.16.0-37-generic from
Utopic and voilà: It works without problems and error
I am on ubuntu 14.04. fix pack 1 = linux kernel 3.16.0-33. HP Elitebook
840
There is no more *ERROR* too many retries, in the log, but the behaviour
is still the same as people describe above.
When VGA is connected to the docking station, reboot fixes the problem
When VGA is connected directly
ANYONE: Is there a way to get debug logs when this thing happens? Anyway
to reset the VGA driver or anything except rebooting the whole
machine?
When pluging the external monitor dmesg shows nothing -- also greping /var/log
shows nothing.
I don't know where else to look.
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Today it happened to me again and after unplugging and replugging the
monitor 10 times it worked!!!
It almost makes me feel it must be a HW issue but:
- I'm using two different displayport adapters (DP to VGA at home DP to HDMI
at work)
- it never ever happened during a powering on (have
As I wrote above: for me logging out of the session and in again
consistently restores it (already when lightdm is restarting it is
resolved and both monitors work again).
(This is true unless using kernel 3.13.0-44-generic where the VGA port
never works.)
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Nick I understand. I personally use tmux a lot to avoid this, but this
works only for console applications.
The important point I wanted to make is: it does not require a hardware-
level-reset to restore the functionality.
As a consequence I believe this should be fixable in software.
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You're right Peter: logging out to lightdm also works for me.
However quitting the GUI session is the real pain for me: it's very
often that I have two dozen windows spread over a few virtual screens,
everything arranged in just the right order. I just hate loosing this.
Rebooting only adds a few
In my case things are (mostly) OK since a few days (I'm now on
3.13.0-46). One or two times it failed but I have no ideat what trigered
the failure. To tell the trouth I also begun suspending the notebook
first then removing the hdmi cable because *maybe* it helps. Nevered
failed since I do this
The problem is far less severe with HDMI cable, it works most of the
time. With D-sub it never works after the first plug out.
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Title:
External
Nick Demou: I tried with 3.13.0-32-generic, 3.13.0-44-generic,
3.13.0-45-generic, 3.13.0-46-generic
In 44 it does not work, not even once. The external VGA port never
becomes active.
All the others work with the described bug:
* the VGA port becomes mirrored during boot.
* When I unplug it and
I now installed bumblebee and the issue is still the same. It works once
and then no more.
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Title:
External screen undetected after first plug
I have the same problem. When I press Detect Displays in the displays
settings dialogue I get three [drm:intel_dp_aux_native_read] *ERROR*
too many retries, giving up lines in the syslog.
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I have a GeForce GT 740M card and this happens
* with nouveau drivers
* with proprietary NVIDIA drivers
* with GeForce settings to intel gpu
* with GeForce settings to NVIDIA gpu
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display port seems to work fine -- it may be used as workaround
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Title:
External screen undetected after first plug
To manage notifications
I have the same symptoms only _after_ upgrading to 3.13.0-44-generic.
Can you test an earlier kernel version and see if the problem goes away?
uname -a
Linux ndXPS13 3.13.0-44-generic #73~precise1-Ubuntu SMP Wed Dec 17 00:38:38 UTC
2014 i686 i686 i386 GNU/Linux
Here is a duplicate issue, with apport info:
https://bugs.launchpad.net/ubuntu/+source/libdrm/+bug/1411552
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Title:
External screen undetected
Here's another report with HP EliteBook 840.
== dmesg ==
DMI: Hewlett-Packard HP EliteBook 840 G1/198F, BIOS L71 Ver. 01.04 10/09/2013
== /proc/cpuinfo ==
model name : Intel(R) Core(TM) i5-4300U CPU @ 1.90GHz
== lspci ==
00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT
What does the output of xrandr show when VGA is working, and when it
is not?
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Title:
External screen undetected after first plug
To manage
Sorry, I have changed both the computer and the desktop environment since then.
I had work to do and needed reliable settings quickly.
I have achieved this with a Thinkpad and KDE.
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I observe the same problem on 14.04 on HP EliteBook 840.
dmesg:
[0.00] Linux version 3.13.0-36-generic (buildd@toyol) (gcc version
4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #63-Ubuntu SMP Wed Sep 3 21:30:07 UTC 2014
(Ubuntu 3.13.0-36.63-generic 3.13.11.6)
[0.00] DMI: Hewlett-Packard HP
I tried the mainline kernel: 3.15.6-031506-generic, still the same
problem.
** Tags added: kernel-bug-exists-upstream
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Title:
External screen
This issue affects me too (Ubuntu GNOME 14.04 on a Macbook Pro 11.1).
With Ubuntu GNOME 13.10 it didn't.
Hereby attached is a log file with two kind of messages:
* [...] [drm:intel_dp_i2c_aux_ch] *ERROR* too many retries, giving up
* [...] [drm:intel_dp_aux_native_read] *ERROR* too many retries,
Hallo,
i have the same problem under Xubuntu 14.04 and a brandnew HP Zbook 14.
At system boot my external vga screen was detected correctly and a few
seconds after Xubuntu-XFCE-Login the external screen isn't available. At
a few seconds i have seen the correct XFCE-desktop through the login
The simple fact to switch to a TTY reactivate the screen. There are also no
issues in other windows managers than Gnome (e.g. Openbox), xrandr works well.
So probably neither an Xorg nor a driver issue.
It seems to be Gnome-related.
** Tags removed: kernel-bug-exists-upstream
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I am not able to provide technical details at this time. This a
functional issue and I don't know what package is involved.
** Changed in: linux (Ubuntu)
Status: Incomplete = Confirmed
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Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v3.14 kernel[0].
If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.
If the mainline kernel does not fix
I tested with 3.14, and same problem.
But I caught some kernel messages every time I replug the screen:
[ 42.038474] [drm:intel_dp_complete_link_train] *ERROR* failed to train DP,
aborting
[ 57.587925] [drm:intel_dp_aux_native_read] *ERROR* too many retries, giving
up
[ 57.600327]
Also note that I had no issue on Ubuntu 12.04, so this is a regression.
** Changed in: linux (Ubuntu)
Status: Incomplete = Confirmed
** Tags added: kernel-bug-exists-upstream
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