Hello,
I have older plasma FHD TV (Panasonic TX-P42GW30). I have connected two PCs to this TV over HDMI.
- RaspberryPi (Raspbian, OpenBox): the screen is perfectly fit.
- Intel NUC8i3BEK (Manjaro, KDE): the screen is overscanned behind all the edges of the TV.
In Raspberry Pi I don’t have any special in /boot/config.txt:
# uncomment if you get no picture on HDMI for a default "safe" mode
#hdmi_safe=1
# uncomment this if your display has a black border of unused pixels visible
# and your display can output without overscan
disable_overscan=0
# uncomment the following to adjust overscan. Use positive numbers if console
# goes off screen, and negative if there is too much border
#overscan_left=16
#overscan_right=16
#overscan_top=16
#overscan_bottom=16
# uncomment to force a console size. By default it will be display's size minus
# overscan.
#framebuffer_width=1280
#framebuffer_height=720
# uncomment if hdmi display is not detected and composite is being output
hdmi_force_hotplug=1
# uncomment to force a specific HDMI mode (this will force VGA)
hdmi_group=1
hdmi_mode=31
# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
##hdmi_drive=2
# uncomment to increase signal to HDMI, if you have interference, blanking, or
# no display
#config_hdmi_boost=4
# uncomment for composite PAL
#sdtv_mode=2
What I tried
I tried to run autorandr but it did nothing.
Next what I tried was xrandr -transform. Via GIMP I took screenshot and set perspective according to overscan. The result matrix I put in xrandr: xrandr --output DP-1 --transform 1.0473,0,-43.5,0,1.048,-25.5,0,0,1 It works in 75 %. The right side of the screen is still behind the edge of TV and I didn’t find out how to fix it. And at all it wasn’t pefrect.
The next try was with setting the new mode in xrandr. I used this script:
#!/bin/bash
RES="1920 1080 60" && \
DISP=$(xrandr | grep -e " connected [^(]" | sed -e "s/\([A-Z0-9]\+\) connected.*/\1/") && \
MODELINE=$(cvt $(echo $RES) | grep -e "Modeline [^(]" | sed -r 's/.*Modeline (.*)/\1/') && \
MODERES=$(echo $MODELINE | grep -o -P '(?<=").*(?=")') && \
cat > ./xrandr_newmode.sh << _EOF
#!/bin/sh
xrandr --newmode $MODELINE
xrandr --addmode $DISP $MODERES
_EOF
I ran it on the Raspberry Pi, which generated script xrandr_newmode.sh that I copied on Intel NUC. But there already was mode 1920x1080 so it didn’t help.
Next try: set underscan in xrandr resulted in error:
$ xrandr --output DP-1 --set underscan on ✔
X Error of failed request: BadName (named color or font does not exist)
Major opcode of failed request: 140 (RANDR)
Minor opcode of failed request: 11 (RRQueryOutputProperty)
Serial number of failed request: 32
Current serial number in output stream: 32
Now I’m a little bit on the end. I appreciate if anybody knows how to fix it.
