[Nouveau] Instable graphics with GeForce GT 730M, especially on external monitor

[Ilia Mirkin]

What's the connector name when you plug in via, say, DVI? Is it "DP-1"
or is it "DVI-D-1" or whatever? You should be able to see the name in
'xrandr'. Unfortunately I don't know how the T440p is wired, there are
a few ways it could go. In some cases, even the "VGA" port is secretly
a DP -> VGA active adapter inside the laptop.

Basically I'm trying to rule DisplayPort as a source of potential issues.

  -ilia

On Tue, Jun 18, 2019 at 4:12 PM Harald Harders <harald.harders at gmx.de> wrote:
>
> Hi Ilia,
>
> First I had upgraded from OpenSUSE 13.2 (where it worked) to OpenSUSE Leap 15.1. After having the same issue I have done a clean new install. The new kernel version is 4.12.14, as you suspected. In OpenSUSE, I suspect it was version 3.16.7. Unfortunately, I cannot find out anymore which nouveau version I have used before. I have a file backup of the old installation. Can I find out which nouveau version I had before?
>
> During all my attempts, I have also installed Ubuntu 18.04.2 with the same strange behaviour. I guess this was the 4.18 kernel version?
> Do you know which distrubtion already uses a 5.0 kernel? I will try a live system, then.
>
> I have a docking station with 4 monitor ports: VGA, DVI, HDMI, Displayport. And my laptop has VGA and Mini-Displayport. My monitor (Fujitsu P24W-7 LED) has VGA, DVI, HDMI, and Displayport.
> I have tried  DVI->DVI and DisplayPort->HDMI cable on the docking station (I don't hav. In one of my attempts, I have connected the screen via analog VGA cable directly to the computer. The same effect resulted. Thus, I believe the docking station and digital connection to the monitor are not part of the problem.
>
> Best regards
> Harald
>
> PS: I guess sending to the mailing list and omitting your personal mail address is correct, right?
>
>
> Gesendet: Dienstag, 18. Juni 2019 um 21:36 Uhr
> Von: "Ilia Mirkin" <imirkin at alum.mit.edu>
> An: "Harald Harders" <harald.harders at gmx.de>
> Cc: nouveau <nouveau at lists.freedesktop.org>
> Betreff: Re: [Nouveau] Instable graphics with GeForce GT 730M, especially on external monitor
> Which kernel did you update from and to? Also, 4.12 is fairly old -
> can you try like a live usb image of some distro with e.g. a 5.0
> kernel or something?
>
> How do you connect the external screen? Is it like a DP port with an
> optional dock with a variety of active DP adapters? Or is there a DP++
> port that you're plugging a DP <-> HDMI passive adapter into?
>
> On Tue, Jun 18, 2019 at 3:28 PM Harald Harders <harald.harders at gmx.de> wrote:
> >
> > Dear all,
> >
> > I have recently updated my Lenovo T440p with a dual graphics card (Intel Core + GeForce GT 730M) to OpenSUSE Leap 15.1. Since then, the external screen (connected either via VGA, DVI, HDMI, or DisplayPort) has a vertically stretched output which jumps horizontally in high frequency. Whenever touching any settings for the built in display (e.g. by gnome-control-center), also this screen starts incorrect display. Sometimes, however, also the external screen works as expected.
> >
> > Installed driver version is (only 2D installed):
> > xf86-video-nouveau: 1.0.15-lp151.4.1
> > libvdpau_nouveau: 18.3.2-lp151.22.4
> > libdrm_nouveau2: 2.4.97-lp151.1.1
> >
> > I have followed your instructions on the TroubleShooting page, No signs for NVIDIA drivers running, everything appears to be okay. Minimal xorg.conf did not work, screenshots are okay.Unfortunately, I failed in installing the most recent nouveau version (neither /lib/modules/4.12.14-lp151.28.4-default/source nor /lib/modules/4.12.14-lp151.28.4-default/build are present on my computer even though I have installed the Kernel sources). The installed version is still quite new, isn't it?
> >
> > I suspect that I might have the issue you describe under "Blank monitor, flicker, snow, or other random live image corruption". I would like to make sure, however. And since you warn with regards to potential permanent damage, I would like to make sure, first.
> > Can you confirm that it should be this issue? Or are there any other things I should try first?
> >
> > Best regards
> > Harald
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > lose:/home/harders/download/nouveau/drm # lspci | grep -i vga
> > 00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06)
> > 02:00.0 VGA compatible controller: NVIDIA Corporation GK208M [GeForce GT 730M] (rev a1)
> >
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