Here's a proper fix/workaround: Edit /boot/firmware/usercfg.txt and add
the line:
disable_overscan=1
** Also affects: linux-firmware-raspi2 (Ubuntu)
Importance: Undecided
Status: New
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Packages, which is subscribed to linux-raspi in Ubuntu.
https://bugs.launchpad.net/bugs/1896180
Title:
Raspberry Pi HDMI output has thick black borders
Status in linux-firmware-raspi2 package in Ubuntu:
New
Status in linux-raspi package in Ubuntu:
New
Bug description:
Raspberry Pi HDMI output has thick black borders.
This appears to be due to some DRM property defaults coming from the
kernel. You can fix them in Xorg sessions with:
xrandr --output HDMI-1 --set "top margin" 0
xrandr --output HDMI-1 --set "bottom margin" 0
xrandr --output HDMI-1 --set "left margin" 0
xrandr --output HDMI-1 --set "right margin" 0
To work around the issue in Wayland sessions you will need to log into
Xorg first, run the above commands, then log out and into Wayland.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-firmware-raspi2/+bug/1896180/+subscriptions
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