theeta
06-28-2020, 07:27 PM
I have Arch Linux installed on my system. I have a miniRay projector which works on the Display Link technology.
The projector works fine with my android phone. But while trying to make it work with the Laptop where Arch is installed, the screen always gets broken.
I believe the issue is with resolution compatibilty between my system and the projector.
https://paste.pics/2872defa1ef9470235448426ab0061e9
[theta@boolean-pc ~]$ xrandr
Screen 0: minimum 8 x 8, current 1368 x 768, maximum 32767 x 32767
eDP1 connected primary 1368x768+0+0 (normal left inverted right x axis y axis) 310mm x 170mm
1368x768_60.00 59.88 +
1920x1080 60.06 + 59.93 40.04
1680x1050 59.88
1400x1050 59.98
1600x900 60.00 59.95 59.82
1280x1024 60.02
1400x900 59.96 59.88
1280x960 60.00
1368x768 60.00* 59.88 59.85
1280x800 59.81 59.91
1280x720 59.86 60.00 59.74
1024x768 60.00
1024x576 60.00 59.90 59.82
960x540 60.00 59.63 59.82
800x600 60.32 56.25
864x486 60.00 59.92 59.57
640x480 59.94
720x405 59.51 60.00 58.99
640x360 59.84 59.32 60.00
HDMI1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
DVI-I-1-1 connected 640x480+640+0 (normal left inverted right x axis y axis) 211mm x 158mm
1368x768_60.00 59.88 +
854x480 59.23 +
856x480_59.90 59.91
1368x768_59.90 59.90
864x486_59.90 59.91
640x480_59.90 59.91*
1368x768_60.00 (0x47) 85.250MHz -HSync +VSync
h: width 1368 start 1440 end 1576 total 1784 skew 0 clock 47.79KHz
v: height 768 start 771 end 781 total 798 clock 59.88Hz
856x480_59.90 (0xa1f) 31.680MHz -HSync +VSync
h: width 856 start 872 end 960 total 1064 skew 0 clock 29.77KHz
v: height 480 start 481 end 484 total 497 clock 59.91Hz
1368x768_59.90 (0xca7) 85.720MHz -HSync +VSync
h: width 1368 start 1440 end 1584 total 1800 skew 0 clock 47.62KHz
v: height 768 start 769 end 772 total 795 clock 59.90Hz
864x486_59.90 (0xcde) 32.850MHz -HSync +VSync
h: width 864 start 888 end 976 total 1088 skew 0 clock 30.19KHz
v: height 486 start 487 end 490 total 504 clock 59.91Hz
640x480_59.90 (0xd30) 23.820MHz -HSync +VSync
h: width 640 start 656 end 720 total 800 skew 0 clock 29.77KHz
v: height 480 start 481 end 484 total 497 clock 59.91Hz
[theta@boolean-pc ~]$
The different modelines generated in thh DVI-I-1-1 output have been tried by me to try out which one runs. To generate them I am using a script as follows
#!/bin/bash
#
# The MIT License (MIT)
#
# Copyright (c) 2013-2014 Nathan Typanski
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# Script for setting up DisplayLink monitor.
#
# Fill in MAINOUTPUT, MAINPROVIDER, WIDTH, HEIGHT, and REFRESH with your own
# values before use.
MAINOUTPUT="eDP1" # Obtained from xrandr --current
MAINPROVIDER="0" # Obtained from xrandr --listproviders
WIDTH="854" # Width of DisplayLink monitor in pixels
HEIGHT="480" # Height of DisplayLink monitor in pixels
WIDTH="1368" # Width of DisplayLink monitor in pixels
HEIGHT="768" # Height of DisplayLink monitor in pixels
WIDTH="640" # Width of DisplayLink monitor in pixels
HEIGHT="480" # Height of DisplayLink monitor in pixels
REFRESH="59.9" # Refresh rate of DisplayLink monitor
#REFRESH="60" # Refresh rate of DisplayLink monitor
# Behave like `echo`, but print the first arg in blue, and subsequent args in
# regular font. Purely for eyecandy.
function blueprint() {
tput setaf 6
tput bold
for arg in "$@"; do
printf "$arg "
tput sgr0
done
echo
}
# Print in bold red text to stderr and exit the program with status 1.
function fail() {
tput setaf 1
tput bold
for arg in "$@"; do
echo "$arg" > /dev/stderr
tput sgr0
done
tput sgr0
exit 1
}
# Generate modeline info for the displaylink monitor in xrandr using 'gtf'.
# We need to do some work on gtf's output to make it usable.
modeline=$(gtf "$WIDTH" "$HEIGHT" "$REFRESH" |\
grep 'Modeline' |\
sed 's/\( *Modeline *\)//g' |\
sed 's/"//g')
dlmodename=$(echo "$modeline" | cut -d ' ' -f 1)
# Try to guess at the DisplayLink provider number. If there are other
# modesetting providers active, this might fail to grab the correct
# one.
dlprovider=$(xrandr --listproviders | \
grep 'name:modesetting' | \
cut -d ' ' -f 2 | \
sed -e 's/://g')
if [ -z "$dlprovider" ]; then
fail "<< No displaylink providers found, bailing! >>"
fi
# Obtain the dimensions of the main provider.
mainstatus=$(xrandr --current | grep "$MAINOUTPUT" | cut -d ' ' -f 4)
if [ -z "$mainstatus" ]; then
fail "<< Couldn't get status of main output $MAINOUTPUT >>"
fi
# Get the width, height, and position of the main provider from $mainstatus
# so we can place the DisplayLink output next to it.
attributes=($(sed \
's/\([0-9]\+\)x\([0-9]\+\)+\([0-9]\+\)+\([0-9]\+\)/\1 \2 \3 \4/g' \
<<< "$mainstatus"))
# Break attributes into component parts so we can use nice descriptive names.
mainwidth="${attributes[0]}"
mainheight="${attributes[1]}"
mainx="${attributes[2]}"
mainy="${attributes[3]}"
blueprint ">> Generated modeline:" "$modeline"
blueprint ">> Detected DisplayLink provider:" "$dlprovider"
blueprint ">> Main output config:"\
"$mainwidth"x"$mainheight" 'resolution'\
'at position ('"$mainx"','"$mainy"')'
# DisplayLink monitors usually show up as DVI outputs, but we could probably
# find a more definitive way to check this.
if ! xrandr | grep DVI; then
blueprint "Associating DL provider with $MAINPROVIDER"
xrandr --setprovideroutputsource "$dlprovider" "$MAINPROVIDER" > /dev/null
if [[ "$?" -ne 0 ]]; then
fail "Could not set Displayink provider."
fi
fi
if ! xrandr | grep "$dlmodename" > /dev/null; then
blueprint ">> Desired DisplayLink mode "
printf "$dlmodename"
blueprint " does not exist! Creating new mode ...\n"
xrandr --newmode $modeline || fail "could not create mode for $dlmodename"
fi
dloutput=$(xrandr | grep DVI | cut -d ' ' -f 1)
[ "$dloutput" ] || fail " << Failed to find the DisplayLink output >>";
blueprint ">> DisplayLink output: " "$dloutput"
# Add the modeline to the DisplayLink output. Perhaps we shouldn't actually do
# this every time, and in fact we should look and see if DVI-whatever already
# has that mode associated with it.
xrandr --addmode "$dloutput" "$dlmodename"
echo --output "$MAINOUTPUT" \
--mode "$mainwidth"x"$mainheight" \
--pos "$mainx"x"$mainy" --rotate normal \
--output "$dloutput" --mode "$dlmodename" \
--pos "$mainwidth"x"$mainy" --rotate normal \
--output eDP1 --off
# The payoff. If this passes, we're in business.
xrandr --output "$MAINOUTPUT" \
--mode "$mainwidth"x"$mainheight" \
--pos "$mainx"x"$mainy" --rotate normal \
--output "$dloutput" --mode "$dlmodename" \
--pos "$mainwidth"x"$mainy" --rotate normal \
--output eDP1 --off \
|| fail "<< Couldn't configure xrandr outputs - try doing it manually >>"
My System:
[theta@boolean-pc ~]$ uname -a
Linux boolean-pc 5.7.4-arch1-1 #1 SMP PREEMPT Thu, 18 Jun 2020 16:01:07 +0000 x86_64 GNU/Linux
dkms O/P
[theta@boolean-pc ~]$ dkms status
evdi, 1.7.0, 5.4.47-1-lts, x86_64: installed
evdi, 1.7.0, 5.7.4-arch1-1, x86_64: installed
vboxhost, 6.1.10_OSE, 5.4.47-1-lts, x86_64: installed
vboxhost, 6.1.10_OSE, 5.7.4-arch1-1, x86_64: installed
The projector works fine with my android phone. But while trying to make it work with the Laptop where Arch is installed, the screen always gets broken.
I believe the issue is with resolution compatibilty between my system and the projector.
https://paste.pics/2872defa1ef9470235448426ab0061e9
[theta@boolean-pc ~]$ xrandr
Screen 0: minimum 8 x 8, current 1368 x 768, maximum 32767 x 32767
eDP1 connected primary 1368x768+0+0 (normal left inverted right x axis y axis) 310mm x 170mm
1368x768_60.00 59.88 +
1920x1080 60.06 + 59.93 40.04
1680x1050 59.88
1400x1050 59.98
1600x900 60.00 59.95 59.82
1280x1024 60.02
1400x900 59.96 59.88
1280x960 60.00
1368x768 60.00* 59.88 59.85
1280x800 59.81 59.91
1280x720 59.86 60.00 59.74
1024x768 60.00
1024x576 60.00 59.90 59.82
960x540 60.00 59.63 59.82
800x600 60.32 56.25
864x486 60.00 59.92 59.57
640x480 59.94
720x405 59.51 60.00 58.99
640x360 59.84 59.32 60.00
HDMI1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
DVI-I-1-1 connected 640x480+640+0 (normal left inverted right x axis y axis) 211mm x 158mm
1368x768_60.00 59.88 +
854x480 59.23 +
856x480_59.90 59.91
1368x768_59.90 59.90
864x486_59.90 59.91
640x480_59.90 59.91*
1368x768_60.00 (0x47) 85.250MHz -HSync +VSync
h: width 1368 start 1440 end 1576 total 1784 skew 0 clock 47.79KHz
v: height 768 start 771 end 781 total 798 clock 59.88Hz
856x480_59.90 (0xa1f) 31.680MHz -HSync +VSync
h: width 856 start 872 end 960 total 1064 skew 0 clock 29.77KHz
v: height 480 start 481 end 484 total 497 clock 59.91Hz
1368x768_59.90 (0xca7) 85.720MHz -HSync +VSync
h: width 1368 start 1440 end 1584 total 1800 skew 0 clock 47.62KHz
v: height 768 start 769 end 772 total 795 clock 59.90Hz
864x486_59.90 (0xcde) 32.850MHz -HSync +VSync
h: width 864 start 888 end 976 total 1088 skew 0 clock 30.19KHz
v: height 486 start 487 end 490 total 504 clock 59.91Hz
640x480_59.90 (0xd30) 23.820MHz -HSync +VSync
h: width 640 start 656 end 720 total 800 skew 0 clock 29.77KHz
v: height 480 start 481 end 484 total 497 clock 59.91Hz
[theta@boolean-pc ~]$
The different modelines generated in thh DVI-I-1-1 output have been tried by me to try out which one runs. To generate them I am using a script as follows
#!/bin/bash
#
# The MIT License (MIT)
#
# Copyright (c) 2013-2014 Nathan Typanski
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# Script for setting up DisplayLink monitor.
#
# Fill in MAINOUTPUT, MAINPROVIDER, WIDTH, HEIGHT, and REFRESH with your own
# values before use.
MAINOUTPUT="eDP1" # Obtained from xrandr --current
MAINPROVIDER="0" # Obtained from xrandr --listproviders
WIDTH="854" # Width of DisplayLink monitor in pixels
HEIGHT="480" # Height of DisplayLink monitor in pixels
WIDTH="1368" # Width of DisplayLink monitor in pixels
HEIGHT="768" # Height of DisplayLink monitor in pixels
WIDTH="640" # Width of DisplayLink monitor in pixels
HEIGHT="480" # Height of DisplayLink monitor in pixels
REFRESH="59.9" # Refresh rate of DisplayLink monitor
#REFRESH="60" # Refresh rate of DisplayLink monitor
# Behave like `echo`, but print the first arg in blue, and subsequent args in
# regular font. Purely for eyecandy.
function blueprint() {
tput setaf 6
tput bold
for arg in "$@"; do
printf "$arg "
tput sgr0
done
echo
}
# Print in bold red text to stderr and exit the program with status 1.
function fail() {
tput setaf 1
tput bold
for arg in "$@"; do
echo "$arg" > /dev/stderr
tput sgr0
done
tput sgr0
exit 1
}
# Generate modeline info for the displaylink monitor in xrandr using 'gtf'.
# We need to do some work on gtf's output to make it usable.
modeline=$(gtf "$WIDTH" "$HEIGHT" "$REFRESH" |\
grep 'Modeline' |\
sed 's/\( *Modeline *\)//g' |\
sed 's/"//g')
dlmodename=$(echo "$modeline" | cut -d ' ' -f 1)
# Try to guess at the DisplayLink provider number. If there are other
# modesetting providers active, this might fail to grab the correct
# one.
dlprovider=$(xrandr --listproviders | \
grep 'name:modesetting' | \
cut -d ' ' -f 2 | \
sed -e 's/://g')
if [ -z "$dlprovider" ]; then
fail "<< No displaylink providers found, bailing! >>"
fi
# Obtain the dimensions of the main provider.
mainstatus=$(xrandr --current | grep "$MAINOUTPUT" | cut -d ' ' -f 4)
if [ -z "$mainstatus" ]; then
fail "<< Couldn't get status of main output $MAINOUTPUT >>"
fi
# Get the width, height, and position of the main provider from $mainstatus
# so we can place the DisplayLink output next to it.
attributes=($(sed \
's/\([0-9]\+\)x\([0-9]\+\)+\([0-9]\+\)+\([0-9]\+\)/\1 \2 \3 \4/g' \
<<< "$mainstatus"))
# Break attributes into component parts so we can use nice descriptive names.
mainwidth="${attributes[0]}"
mainheight="${attributes[1]}"
mainx="${attributes[2]}"
mainy="${attributes[3]}"
blueprint ">> Generated modeline:" "$modeline"
blueprint ">> Detected DisplayLink provider:" "$dlprovider"
blueprint ">> Main output config:"\
"$mainwidth"x"$mainheight" 'resolution'\
'at position ('"$mainx"','"$mainy"')'
# DisplayLink monitors usually show up as DVI outputs, but we could probably
# find a more definitive way to check this.
if ! xrandr | grep DVI; then
blueprint "Associating DL provider with $MAINPROVIDER"
xrandr --setprovideroutputsource "$dlprovider" "$MAINPROVIDER" > /dev/null
if [[ "$?" -ne 0 ]]; then
fail "Could not set Displayink provider."
fi
fi
if ! xrandr | grep "$dlmodename" > /dev/null; then
blueprint ">> Desired DisplayLink mode "
printf "$dlmodename"
blueprint " does not exist! Creating new mode ...\n"
xrandr --newmode $modeline || fail "could not create mode for $dlmodename"
fi
dloutput=$(xrandr | grep DVI | cut -d ' ' -f 1)
[ "$dloutput" ] || fail " << Failed to find the DisplayLink output >>";
blueprint ">> DisplayLink output: " "$dloutput"
# Add the modeline to the DisplayLink output. Perhaps we shouldn't actually do
# this every time, and in fact we should look and see if DVI-whatever already
# has that mode associated with it.
xrandr --addmode "$dloutput" "$dlmodename"
echo --output "$MAINOUTPUT" \
--mode "$mainwidth"x"$mainheight" \
--pos "$mainx"x"$mainy" --rotate normal \
--output "$dloutput" --mode "$dlmodename" \
--pos "$mainwidth"x"$mainy" --rotate normal \
--output eDP1 --off
# The payoff. If this passes, we're in business.
xrandr --output "$MAINOUTPUT" \
--mode "$mainwidth"x"$mainheight" \
--pos "$mainx"x"$mainy" --rotate normal \
--output "$dloutput" --mode "$dlmodename" \
--pos "$mainwidth"x"$mainy" --rotate normal \
--output eDP1 --off \
|| fail "<< Couldn't configure xrandr outputs - try doing it manually >>"
My System:
[theta@boolean-pc ~]$ uname -a
Linux boolean-pc 5.7.4-arch1-1 #1 SMP PREEMPT Thu, 18 Jun 2020 16:01:07 +0000 x86_64 GNU/Linux
dkms O/P
[theta@boolean-pc ~]$ dkms status
evdi, 1.7.0, 5.4.47-1-lts, x86_64: installed
evdi, 1.7.0, 5.7.4-arch1-1, x86_64: installed
vboxhost, 6.1.10_OSE, 5.4.47-1-lts, x86_64: installed
vboxhost, 6.1.10_OSE, 5.7.4-arch1-1, x86_64: installed