[Bug 105199] New: Upgrade to FC 27 broke support for DisplayPort 1.2 three port adapter

Wed Feb 21 22:15:41 UTC 2018

https://bugs.freedesktop.org/show_bug.cgi?id=105199

            Bug ID: 105199
           Summary: Upgrade to FC 27 broke support for DisplayPort 1.2
                    three port adapter
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: david283 at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

NOTE: I received an email from Ian Pilcher through
users at lists.fedoraproject.org
saying =  

Intel broke multi-stream transport in 4.15/4.14.4:

https://bugs.freedesktop.org/show_bug.cgi?id=104425
https://bugs.freedesktop.org/show_bug.cgi?id=104158

------
My original issue/bug = 

I had a working Fedora 24 box for almost 2 years that I decided to
upgrade to FC 27.  I have 3 monitors and used a 3 way adapter from
StarTech to adapt the single display port from my Intel NUC to support
my 3 displays.  Again this worked fine for years. After the upgrade
this setup stopped working.

My system has an encrypted root and home partition, and an
un-encrypted boot partition.  When I power on the computer with the 3
way adapter I get bios screens and the grub menu.  If I select the old
FC24 kernel to boot, the system proceeds to the password screen where
I unlock my root partition, and then to the user login screen for
fedora.  But if I select one of the new FC 27 kernels on the grub menu
I get a black screen only, no password screen to un-encrypt.  If I use
a straight through DisplayPort cable to power only one screen, the new
Kernels work fine and I can unlock and login.

Also, adding *nomodeset* to the kernel boot options will allow the new
kernels to work with the adapter, but all 3 screens mirror and
performance is way down.  I think this option doesn't use Intel's
drivers?

I looked at Xorg vs Wayland as a possible cause, but the option to
select that is on the user login screen, would that have any effect on
the un-encrypt password screen just after grub?

My graphics are Intel Iris 6100. My hardware is an Intel NUC with i7
processor. Video card is on chip.

So I am stuck.  Please help?

*****
I made sure my Intel drivers where fully updated =

$ sudo dnf install
https://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-$(rpm
-E %fedora).noarch.rpm
Last metadata expiration check: 0:59:03 ago on Tue 16 Jan 2018 09:22:40 PM CST.
rpmfusion-free-release-27.noarch.rpm 24 kB/s | 20 kB 00:00
Package rpmfusion-free-release-27-1.noarch is already installed, skipping.
Dependencies resolved.
Nothing to do.
Complete!

$ sudo dnf install intel-gpu-tools libva-intel-driver libva-utils
libva mesa-libOSMesa cairo-gobject cairo mesa-dri-drivers
mesa-filesystem mesa-libEGL mesa-libGL mesa-libGLES mesa-libgbm
mesa-libglapi mesa-libwayland-egl mesa-libxatracker
Last metadata expiration check: 0:59:23 ago on Tue 16 Jan 2018 09:22:40 PM CST.
Package intel-gpu-tools-2.99.917-31.20171025.fc27.x86_64 is already
installed, skipping.
Package libva-intel-driver-1.8.3-2.fc27.x86_64 is already installed, skipping.
Package libva-intel-driver-1.8.3-2.fc27.i686 is already installed, skipping.
Package libva-utils-1.8.3-4.fc27.x86_64 is already installed, skipping.
Package libva-1.8.3-3.fc27.x86_64 is already installed, skipping.
Package libva-1.8.3-3.fc27.i686 is already installed, skipping.
Package mesa-libOSMesa-17.2.4-2.fc27.x86_64 is already installed, skipping.
Package mesa-libOSMesa-17.2.4-2.fc27.i686 is already installed, skipping.
Package cairo-gobject-1.15.10-1.fc27.x86_64 is already installed, skipping.
Package cairo-gobject-1.15.10-1.fc27.i686 is already installed, skipping.
Package cairo-1.15.10-1.fc27.x86_64 is already installed, skipping.
Package cairo-1.15.10-1.fc27.i686 is already installed, skipping.
Package mesa-dri-drivers-17.2.4-2.fc27.x86_64 is already installed, skipping.
Package mesa-dri-drivers-17.2.4-2.fc27.i686 is already installed, skipping.
Package mesa-filesystem-17.2.4-2.fc27.x86_64 is already installed, skipping.
Package mesa-filesystem-17.2.4-2.fc27.i686 is already installed, skipping.
Package mesa-libEGL-17.2.4-2.fc27.x86_64 is already installed, skipping.
Package mesa-libEGL-17.2.4-2.fc27.i686 is already installed, skipping.
Package mesa-libGL-17.2.4-2.fc27.x86_64 is already installed, skipping.
Package mesa-libGL-17.2.4-2.fc27.i686 is already installed, skipping.
Package mesa-libGLES-17.2.4-2.fc27.x86_64 is already installed, skipping.
Package mesa-libgbm-17.2.4-2.fc27.x86_64 is already installed, skipping.
Package mesa-libgbm-17.2.4-2.fc27.i686 is already installed, skipping.
Package mesa-libglapi-17.2.4-2.fc27.x86_64 is already installed, skipping.
Package mesa-libglapi-17.2.4-2.fc27.i686 is already installed, skipping.
Package mesa-libwayland-egl-17.2.4-2.fc27.x86_64 is already installed,
skipping.
Package mesa-libwayland-egl-17.2.4-2.fc27.i686 is already installed, skipping.
Package mesa-libxatracker-17.2.4-2.fc27.x86_64 is already installed, skipping.
Dependencies resolved.
Nothing to do.
Complete!

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