Differences

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--- howto:monitors [2025/08/16 22:49] – created Wuff
+++ howto:monitors [2025/08/19 00:18] (current) – Wuff
@@ Line 8: / Line 8: @@
   * Disable DCC/CI in the monitor settings. This will disable bidirectional communication between the monitor and the pc.
-  * Enabling DisplayPort 1.2 settings in monitor may help (required for MST anyway)
+  * Enabling or disabling DisplayPort 1.2 settings in monitor may help (required for MST though)
   * Disabling screensaver/power saving options to switch off the monitor can act as a workaround
@@ Line 16: / Line 16: @@
 env DISPLAY=:0 xset dpms force on
 </code>
+Removing kernel parameters like the ones below from grub bootloader for the graphics driver may help:
+<code - /etc/default/grub>
+#GRUB_CMDLINE_LINUX="amdgpu.dcdebugmask=0x10 amdgpu.dc=0"
+</code>
+<code>
+sudo update-grub
+</code>
+If using lightdm or similar and a specific monitor configuration is set, remove or alter it to avoid not being able to see the login screen:
+<code>
+sudo vi /etc/lightdm/lightdm.conf.d/70-linuxmint.conf
+</code>
+Some Sources:
+https://superuser.com/questions/630555/turning-displayport-monitor-off-disables-monitor-completely
+https://unix.stackexchange.com/questions/584088/how-can-i-get-stable-video-output-names
+The autorandr package is able to save and restore the settings based on the monitor edid, thus bypassing the issue of the monitors getting re-arranged:
+https://github.com/phillipberndt/autorandr
+https://packages.debian.org/sid/all/autorandr/download
+<code>
+wget http://ftp.de.debian.org/debian/pool/main/a/autorandr/autorandr_1.15-1_all.deb
+sudo dpkg -i autorandr_1.15-1_all.deb
+rm autorandr_1.15-1_all.deb
+autorandr --match-edid --save user
+</code>
+https://askubuntu.com/questions/1333688/how-to-get-external-monitor-to-reconnect-after-sleep-or-power-off
+https://wiki.archlinux.org/title/AMDGPU