[Bug 202533] New: DVI Monitors blank in 4.20-6 kernel

[Bug 202533] New: DVI Monitors blank in 4.20-6 kernel

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=202533

            Bug ID: 202533
           Summary: DVI Monitors blank in 4.20-6 kernel
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.20
          Hardware: Intel
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: acollier21@gmail.com
        Regression: No

Running Fedora 29 with a Dell Precision M4700 and a Dell Pro2x dock. Has the
K1000 Nvidia card. Under the 4.19 kernel I was able to have all 3 of my
external monitors hooked up and working properly. Anytime I've tried booting
into any 4.20 kernel, only my VGA monitor will display, and the other two are
blank. Currently running the Nouveau drivers. I keep testing each 4.20 kernel
that comes out but none of them have fixed the issue.

Running on Gnome 3.30 under x11 if that matters.

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[Bug 202533] DVI Monitors blank in 4.20-6 kernel

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=202533

Ilia Mirkin (imirkin@alum.mit.edu) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |imirkin@alum.mit.edu

--- Comment #1 from Ilia Mirkin (imirkin@alum.mit.edu) ---
There weren't a ton of changes to nouveau between 4.19 and 4.20. Can you do a
bisect?

There were some changes to add support for HDMI 2.0, but only on GM20x GPUs
(you have a GK10x GPU, which is earlier). And a handful of fixes to MST-related
object lifetime management. It's likely that you have a MST dock, but those
changes don't seem like they would cause anything that drastic.

Please include dmesg and xorg logs.

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[Bug 202533] DVI Monitors blank in 4.20-6 kernel

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=202533

--- Comment #2 from acollier21@gmail.com ---
Created attachment 281081
  --> https://bugzilla.kernel.org/attachment.cgi?id=281081&action=edit
xorg log

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[Bug 202533] DVI Monitors blank in 4.20-6 kernel

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=202533

--- Comment #3 from acollier21@gmail.com ---
Created attachment 281083
  --> https://bugzilla.kernel.org/attachment.cgi?id=281083&action=edit
dmesg log

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[Bug 202533] DVI Monitors blank in 4.20-6 kernel

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=202533

--- Comment #4 from acollier21@gmail.com ---
Attached the logs, hopefully those help!

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[Bug 202533] DVI Monitors blank in 4.20-6 kernel

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=202533

--- Comment #5 from Ilia Mirkin (imirkin@alum.mit.edu) ---
Doesn't seem like nouveau is loaded at all. Probably related to not being able
to get anything to come up on those screens...

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[Bug 202533] DVI Monitors blank in 4.20-6 kernel

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=202533

--- Comment #6 from acollier21@gmail.com ---
Anything else I can try to do?

On Sat, Feb 9, 2019 at 12:57 PM <bugzilla-daemon@bugzilla.kernel.org> wrote:

> https://bugzilla.kernel.org/show_bug.cgi?id=202533
>
> --- Comment #5 from Ilia Mirkin (imirkin@alum.mit.edu) ---
> Doesn't seem like nouveau is loaded at all. Probably related to not being
> able
> to get anything to come up on those screens...
>
> --
> You are receiving this mail because:
> You reported the bug.

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[Bug 202533] DVI Monitors blank in 4.20-6 kernel

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=202533

--- Comment #7 from Ilia Mirkin (imirkin@alum.mit.edu) ---
You could try loading nouveau... or removing the configuration that is
preventing it from loading...

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[Bug 202533] DVI Monitors blank in 4.20-6 kernel

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=202533

--- Comment #8 from acollier21@gmail.com ---
Thanks for your patience. Figured out the error. For whatever reason, there was
a blacklist file in /etc/modprobe.d/ that was blacklisting the nouveau drivers.
4.20 recognized the blacklist while 4.19 did not. 

Thanks for your direction!

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