[Stable Update] 2023-03-31 - Kernels, Plasma 5.27 LTS, Pamac, Phosh, Mesa, LibreOffice

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Tried:

cvt 1920 1080 280                                                            ✔ 
# 1920x1080 279.75 Hz (CVT) hsync: 358.36 kHz; pclk: 969.00 MHz
Modeline "1920x1080_280.00"  969.00  1920 2104 2312 2704  1080 1083 1088 1281 -hsync +vsync
    ~  sudo xrandr --newmode "1920x1080_280.00"  969.00  1920 2104 2312 2704  1080 1083 1088 1281 -hsync +vsync
[sudo] password: 
    ~  sudo xrandr --addmode DP-0 "1920x1080_280.00"                                      ✔ 
X Error of failed request:  BadMatch (invalid parameter attributes)
  Major opcode of failed request:  140 (RANDR)
  Minor opcode of failed request:  18 (RRAddOutputMode)
  Serial number of failed request:  45
  Current serial number in output stream:  46

No clue what to do, need to take a break again, will try again in an hour or so.

Moderator edit: In the future, please use proper formatting: [HowTo] Post command output and file content as formatted text