https://bugs.kde.org/show_bug.cgi?id=426136
Bug ID: 426136
Summary: USB Type-C Display Stopped working after KDE neon
20.04 Upgrade
Product: neon
Version: unspecified
Platform: Neon Packages
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: Packages User Edition
Assignee: neon-b...@kde.org
Reporter: baharalidurr...@gmail.com
CC: j...@jriddell.org, neon-b...@kde.org, sit...@kde.org
Target Milestone: ---
Created attachment 131379
--> https://bugs.kde.org/attachment.cgi?id=131379&action=edit
Before neon 20.04 upgrade multiple Display Configuration
SUMMARY
My Laptop HP ProBook 450 G6 is having one HDMI and one USB Type-C DisplayPort.
I used to connect two external Monitors one using direct HDMI and another using
a USB Type-C to HDMI adapter (Old Screenshot Attached). This configuration
worked out of the box without installing any extra packages.
But after the recent upgrade to KDE neon 20.04 the USB Type-C port stopped
working as a DisplayPort. It is working as normal USB port though I can
transfer files and connect my phone etc but when I connect the a USB-C display
cable it is not detected at all.
Things I Tried:
1. Tested 3 different monitors using USB Type-C to HDMI adapter.
2. Tested another USB Type-C to HDMI adapter.
3. Tested the same combination of hardware on a MacBook and it worked fine.
4. Installed the DisplayLink Driver
(https://www.displaylink.com/downloads/ubuntu)
5. Installed nvidia-driver-440 but after reboot the whole UI messed up so much
that I had to re-install the OS.
6. Tested using a Live Image.
STEPS TO REPRODUCE
1. Get a device with a DisplayPort compatible USB Type-C port.
2. Find a USB Type-C to HDMI adapter generally available for MacBooks.
3. Install latest KDE neon 20.04
4. Try to connect an HDMI monitor using USB Type-C adapter and it won't work.
OBSERVED RESULT
Support for DisplayPort over USB Type-C is removed.
EXPECTED RESULT
DisplayPort over USB Type-C should work as before KDE neon 20.04 upgrade
SOFTWARE/OS VERSIONS
Linux: KDE neon
KDE Plasma Version: 5.19.4
KDE Frameworks Version: 5.73.0
Qt Version: 5.14.2
Kernel Version: 5.4.0-45-generic
dev@neonBook:~ $ neofetch
OS: KDE neon User Edition 5.19 x86_64
Host: HP ProBook 450 G6
Kernel: 5.4.0-45-generic
Uptime: 43 mins
Packages: 1936 (dpkg), 6 (snap)
Shell: bash 5.0.17
Resolution: 1366x768, 1920x1080
DE: Plasma
WM: KWin
WM Theme: McMojave
Theme: Breeze Dark [Plasma], Breeze [GTK2/3]
Icons: breeze-dark [Plasma], breeze-dark [GTK2/3]
Terminal: konsole
Terminal Font: Ubuntu Mono 12
CPU: Intel i7-8565U (8) @ 4.600GHz
GPU: NVIDIA GeForce MX130
GPU: Intel UHD Graphics 620
Memory: 4121MiB / 15886MiB
ADDITIONAL INFORMATION
dev@neonBook:~ $ sudo ubuntu-drivers devices
== /sys/devices/pci0000:00/0000:00:1c.0/0000:01:00.0 ==
modalias : pci:v000010DEd0000174Dsv0000103Csd00008542bc03sc02i00
vendor : NVIDIA Corporation
model : GM108M [GeForce MX130]
driver : nvidia-driver-440-server - distro non-free
driver : nvidia-driver-418-server - distro non-free
driver : nvidia-driver-435 - distro non-free
driver : nvidia-driver-440 - distro non-free recommended
driver : nvidia-driver-390 - distro non-free
driver : xserver-xorg-video-nouveau - distro free builtin
dev@neonBook:~ $
dev@neonBook:~ $ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 06cb:00b7 Synaptics, Inc.
Bus 001 Device 004: ID 1d57:ad17 Xenta ZELOTES GAME MOUSE
Bus 001 Device 003: ID 04ca:7095 Lite-On Technology Corp. HP HD Camera
Bus 001 Device 006: ID 8087:0aaa Intel Corp.
Bus 001 Device 002: ID 413c:2107 Dell Computer Corp. Dell USB Entry Keyboard
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
dev@neonBook:~ $
dev@neonBook:~ $ xrandr
Screen 0: minimum 320 x 200, current 3286 x 1080, maximum 16384 x 16384
eDP-1 connected 1366x768+0+312 (normal left inverted right x axis y axis) 344mm
x 194mm
1366x768 60.06*+
1360x768 59.80 59.96
1280x720 60.00 59.99 59.86 59.74
1024x768 60.04 60.00
960x720 60.00
928x696 60.05
896x672 60.01
1024x576 59.95 59.96 59.90 59.82
960x600 59.93 60.00
960x540 59.96 59.99 59.63 59.82
800x600 60.00 60.32 56.25
840x525 60.01 59.88
864x486 59.92 59.57
800x512 60.17
700x525 59.98
800x450 59.95 59.82
640x512 60.02
720x450 59.89
700x450 59.96 59.88
640x480 60.00 59.94
720x405 59.51 58.99
684x384 59.88 59.85
680x384 59.80 59.96
640x400 59.88 59.98
576x432 60.06
640x360 59.86 59.83 59.84 59.32
512x384 60.00
512x288 60.00 59.92
480x270 59.63 59.82
400x300 60.32 56.34
432x243 59.92 59.57
320x240 60.05
360x202 59.51 59.13
320x180 59.84 59.32
HDMI-1 connected primary 1920x1080+1366+0 (normal left inverted right x axis y
axis) 527mm x 296mm
1920x1080 60.00*+ 50.00 59.94
1680x1050 59.88
1600x900 60.00
1280x1024 60.02
1440x900 59.90
1280x800 59.91
1280x720 60.00 50.00 59.94
1024x768 60.00
800x600 60.32
720x576 50.00
720x480 60.00 59.94
640x480 60.00 59.94
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-2 disconnected (normal left inverted right x axis y axis)
DVI-I-5-4 disconnected (normal left inverted right x axis y axis)
DVI-I-4-3 disconnected (normal left inverted right x axis y axis)
DVI-I-3-2 disconnected (normal left inverted right x axis y axis)
DVI-I-2-1 disconnected (normal left inverted right x axis y axis)
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