Hello again. I have solved GPU problem, I would like to thanks to all.
My new problem is Timeout error. On Arduino IDE program, COM doesnt show there are 4 /dev/ttyS0(1,2,3)
When I tried to upload code:
avrdude: stk500v2_ReceiveMessage(): timeout avrdude: stk500v2_getsync(): timeout communicating with programmer An error occurred while uploading the sketch
Actually the problem is the port. These ttyS are wrong port I know but I dont know how to solve this problem. I looked this problem on internet but didnt fix. Like rebuilded the kernel, changed some files for the mega2560
when I write
Bus 002 Device 013: ID 1a86:7523 QinHeng Electronics HL-340 USB-Serial adapter