I.MX6 UL cant change resolution size

[sarimu_inoue_j7]

HI

i'm using i.mx6Ul and i'm tring to change resolution size from 480x272 to 240x156 by using xranr command

i used command following way

$xrandr --newmode "240x135_60.00"    2.25  240 248 264 288  135 138 143 146 -hsync +vsync

$xrandr --addmode XWAYLAND0 240x135_60.00

$xrand --output XWAYLAND0 --mode 240x135_60.00

then i got following error

#################################################################

X Error of failed request: BadValue (integer parameter out of range for operation)
Major opcode of failed request: 139 (RANDR).
Minor opcode of failed request: 7 (RRAddOutputMode).
Value in failed request:0x0 Serial number of failed request: 22.
Current serial number in output stream: 23

#################################################################

i want now how to solve this error.

or any otherway to change resolution size 

[Rita_Wang]

Which version BSP are you using? You need to confirm if these resolutions are supported first and then you can use.

[sarimu_inoue_j7]

how can i check that?
is that same version as linux-yocto kernel?

[Rita_Wang]

When your board system boot up, you can go to /sys/class/graphics/fb0, use the cat modes to list all the mode. You can try this.

[sarimu_inoue_j7]

sorry for late respond 
i found that my bsp is not supported
thanks for help