I got one Resolution bug about android version when i use hdmi

hi all
i got one Resolution bug when use settings at 410C of android

maybe my monitor very old so can't working at 1440X900 resolution . 410c output 1440X900 ? what can i doing setting low resolution ?
      i try to setting resolution by adb shell : wm size 1080x860 .but 410c will lost this setting when it reboot .

thank your help

Does it reset each time if you change the pixel density property rather than resolution? If so, you can set a script in ramdisk or using the Tasker application.