Linux 4 Tegra Display Resolutions, Rotation, Scaling, and Flipped Mouse Pointer

Graphics / Linux Linux
1

Hello People,

My goal is to have the display resolution of 804x1286 and to have the display rotated ninety degrees (landscape) making it 1286 x 804.

When I boot Ubuntu I only see one display resolution available. The resolution is 1200x1900 and it is in portrait mode.

I have attempted to add resolutions to xorg.conf manually and tried to use xrandr to add resolutions. These attempts appear to have failed.

I have been able to use xrandr to scale the resolution. Combined with the option to rotate the display using the display options applet, I can get what I want. However, this does not apply to other window managers (xubuntu or lubuntu, for example) and has to be performed upon every reboot.
When I do this, the cursor appears flipped and reversed, i.e. moving down and to the right moves the cursor up and to the left … kinda.

How can I add display resolutions so that I can select them from the display applet and are available to xubuntu, lubuntu, etc)?

Thank you,

=thoth=

Some Info:

gtf 1286 804 60

# 1288x804 @ 60.00 Hz (GTF) hsync: 49.92 kHz; pclk: 84.26 MHz
Modeline "1288x804_60.00"  84.26  1288 1352 1488 1688  804 805 808 832  -HSync +Vsync

xrandr

Screen 0: minimum 8 x 8, current 1200 x 1920, maximum 16384 x 16384
DSI-0 connected primary 1200x1920+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1200x1920      60.0*+
HDMI-0 disconnected (normal left inverted right x axis y axis)

xrandr --q1

SZ:    Pixels          Physical       Refresh
*0   1200 x 1920   ( 406mm x 650mm )  *50
 1   1024 x 768    ( 346mm x 260mm )   51
 2    800 x 600    ( 270mm x 203mm )   52
 3    640 x 480    ( 216mm x 162mm )   53
 4   1200 x 675    ( 406mm x 228mm )   54
Current rotation - normal
Current reflection - none
Rotations possible - normal left inverted right
Reflections possible - X Axis Y Axis

Does not exist:

/etc/X11/xorg.conf.d/10-monitor.conf

and is instead located at

/usr/share/X11/xorg.conf.d/10-monitor.conf

/usr/share/X11/xorg.conf.d/10-monitor.conf (one attempt to add a mode)

Section "Monitor"
  Identifier "Monitor0"
  Modeline "1280x800_60.00"  83.46  1280 1344 1480 1680  800 801 804 828  -HSync +Vsync
EndSection
Section "Screen"
  Identifier "Screen0"
  Device "DSI-0"
  Monitor "Monitor0"
  DefaultDepth 24
  SubSection "Display"
    Depth 24
    Modes "1280x800_60.00"
  EndSubSection

/etc/X11/xorg.conf

# Copyright (c) 2011-2013 NVIDIA CORPORATION.  All Rights Reserved.
#
# This is the minimal configuration necessary to use the Tegra driver.
# Please refer to the xorg.conf man page for more configuration
# options provided by the X server, including display-related options
# provided by RandR 1.2 and higher.

# Disable extensions not useful on Tegra.
Section "Module"
    Disable     "dri"
    SubSection  "extmod"
        Option  "omit xfree86-dga"
    EndSubSection
EndSection

/etc/X11/xorg.conf.jetson-tk1

# Copyright (c) 2011-2014 NVIDIA CORPORATION.  All Rights Reserved.
#
# This is the minimal configuration necessary to use the Tegra driver.
# Please refer to the xorg.conf man page for more configuration
# options provided by the X server, including display-related options
# provided by RandR 1.2 and higher.

# Disable extensions not useful on Tegra.
Section "Module"
    Disable     "dri"
    SubSection  "extmod"
        Option  "omit xfree86-dga"
    EndSubSection
EndSection

Section "Device"
    Identifier  "Tegra0"
    Driver      "nvidia"
EndSection

Section "Monitor"
   Identifier "DSI-0"
   Option    "Ignore"
EndSection
2

Hello,

My fix for this is to use xinput to adjust a matrix used by something to determine cursor position.

xinput set-prop touch --type=float "Coordinate Transformation Matrix" 0 -1 1 1 0 0 0 0 1

I use a script to make the three adjustments I need:

#!/bin/bash

# Use XRandR to rotate left once.
xrandr -o left


# Use XRandR to scale the display to sixty-six percent.
#       1286x804
#       XRandR = X Rotate and Resize
xrandr --output DSI-0 --scale 0.66666x0.66666


# Use XInput to change the Coordinate Transformation Matrix.
xinput set-prop touch --type=float "Coordinate Transformation Matrix" 0 -1 1 1 0 0 0 0 1

I did note that when I use xrandr … --rotate to rotate the screen instead of xrandr -o, the end result seems to differ a bit.

Additionally, I am doing this with xubuntu.

=thoth=