Rotation working on DL-4300 USB3.0

[taiki]

Hi.
Great work.

Do you use xf86-video-intel?
Should I uninstall the AUR evdi and displaylink manager for rotation?

Please help me.

[seidler2547]

Works with intel and modesetting, I tried both. xf86-video-intel is deprecated, but it works fine for me.

evdi and displaylink need both be installed from AUR. I found out that sometimes the USB takes a while to register, so when that happens and the devices are recognized after X starts, X will not set the "PageFlip" option.

So in /opt/displaylink/udev.sh I replaced

  systemctl start displaylink.service

with

  systemctl start displaylink.service
  systemctl restart display-manager.service

Stefan

[seidler2547]

I recently got a StarTech USB3.0 Dock with DVI, HDMI and VGA outputs and the above method still works when using modesetting for the primary GPU and having PageFlip off on all driver definitions. Using evdi 1.3.43 and DLM 1.3.52.

So I have both external screens connected to the dock and both rotate ok. This doesn't seem to honour VSync, so glxgears reports about 290fps.

I have named the Driver Identifiers Card0, Card1 and Card2 and that seems to convince X to pick up the PageFlip off Option correctly every time, so no need to restart display-manager.service.

Stefan

[taiki]

Thanks to your reply.

I made the 99-evdi.conf in xorg.conf.d like following:

Section "Device"
  Identifier  "intel"
  Driver      "modesetting"
  Option      "kmsdev" "/dev/dri/card0"
  Option      "SWCursor" "on"
  Option      "PageFlip" "off"
  Option      "ShadowFB" "true"
  Option       "RandRRotation" "True"

EndSection

Section "Device"
  Identifier  "USB3"
  BusID       "USB"
  Driver      "modesetting"
  Option      "kmsdev" "/dev/dri/card1"
  Option       "ReportDamage" "on"
  Option       "SWCursor" "on"
  Option       "ShadowFB" "on"
  Option       "RandRRotation" "True"
  Option       "rotate" "CCW"

EndSection

But I cannot rotate because No rotation option avaiable.

There are the xrandr outputs.

Screen 0: minimum 8 x 8, current 4102 x 1824, maximum 32767 x 32767
eDP1 connected primary 2736x1824+0+0 (normal left inverted right x axis y axis) 260mm x 173mm
   2736x1824      60.0*+
DP1 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
DVI-I-1 connected 1366x768+2736+0 344mm x 194mm
   1366x768       60.0*+
   1024x768       75.1     70.1     60.0  
   800x600        72.2     75.0     60.3     56.2  
   848x480        60.0  
   640x480        75.0     72.8     60.0     59.9

[Conassa]

Stefan, awesome, thanks for this. Rotation works fine on my Intel HD4000.

I have reduced your xorg config to this:

Section "Device"
  Identifier  "intel"
  Option      "kmsdev" "/dev/dri/card0"
  Option      "PageFlip" "off"
EndSection

Section "Device"
  Identifier  "USB3"
  BusID       "USB"
  Driver      "modesetting"
  Option      "kmsdev" "/dev/dri/card1"
  Option      "PageFlip" "off"
EndSection

I'm also using the new driver - and glxgears seems synced with the DisplayLink monitor's refresh rate. However for it to draw properly I had to use:
compton --glx-use-copysubbuffermesa --glx-no-rebind-pixmap
(I'm using compton with openbox)

My only complain is CPU usage. With glxgears running I get 40% usage on one core... is this normal?

taiki - try removing the RandRRotation and rotate options. It rotates fine for me without those.

[Eevey]

Thanks for the information and research, rotation works like a charm here as well, after some fiddling! (Gnome Shell on Antergos/Arch Linux)

I have an Asus MB169B+ that I bought without properly researching whether screen rotation would work on Linux, and was quite shocked to find that it didn't out of the box. I tried a number of variations, based on the experience of the other people in this thread, and found that it didn't really work properly without having all the lines:

Section "Device"
  Identifier  "intel"
  Driver      "modesetting"
  Option      "kmsdev" "/dev/dri/card0"
  Option      "PageFlip" "off"
  Option      "SWCursor" "on"
  Option      "ShadowFB" "true"
EndSection

Section "Device"
  Identifier  "USB3"
  BusID       "USB"
  Driver      "modesetting"
  Option      "kmsdev" "/dev/dri/card1"
  Option      "PageFlip" "off"
  Option      "SWCursor" "on"
  Option      "ShadowFB" "true"
EndSection

On a side-note: the SWCursor option significantly reduces mouse flickering for me, though it's not completely gone.

Also really hope Wayland will be supported soon and screen rotation will just work out of the box there. :-)

[ArcturusB]

It took me a while to get rotation to work with my Asus MB16A display, so I figured I’d post something in case it helps other users.

The solution posted by Eevey (almost 4 years ago!) for their Asus MB169B+ also works with the MB16A on Arch Linux.