Custom Display Resolution Does Not Work

soso@debian:~$ su
Password:
root@debian:/home/soso# cvt 3440 1440 60
# 3440x1440 59.94 Hz (CVT) hsync: 89.48 kHz; pclk: 419.50 MHz
Modeline "3440x1440_60.00" 419.50 3440 3696 4064 4688 1440 1443 1453 1493 -hsync +vsync
root@debian:/home/soso# xrandr --newmode "3440x1440_60.00" 419.50 3440 3696 4064 4688 1440 1443 1453 1493 -hsync +vsync
root@debian:/home/soso# xrandr -q
Screen 0: minimum 16 x 16, current 1920 x 1080, maximum 32767 x 32767
XWAYLAND0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 800mm x 330mm
1920x1080 59.96*+
1440x1080 59.99
1400x1050 59.98
1280x1024 59.89
1280x960 59.94
1152x864 59.96
1024x768 59.92
800x600 59.86
640x480 59.38
320x240 59.52
1680x1050 59.95
1440x900 59.89
1280x800 59.81
720x480 59.71
640x400 59.95
320x200 58.96
1600x900 59.95
1368x768 59.88
1280x720 59.86
1024x576 59.90
864x486 59.92
720x400 59.55
640x350 59.77
3440x1440_60.00 (0x325) 419.500MHz -HSync +VSync
h: width 3440 start 3696 end 4064 total 4688 skew 0 clock 89.48KHz
v: height 1440 start 1443 end 1453 total 1493 clock 59.94Hz
root@debian:/home/soso# xrandr --addmode XWAYLAND0 3440x1440_60.00
root@debian:/home/soso#