Uart with minicom - no keboard

Hi,
I installed OpenEmbedded from fastboot following the instructions and try to connect to the board with uart. I see the boot output, both kernel and systemd ,
and eventually get:

dragonboard-410c login:

line. But there is no reaction to the keyboard, not able to write anything.

I see the following errors during boot, are they related ?

[ 5.067272] ov5645 1-0078: ov5645_set_power_on: Enter
[ 5.101875] msm_hsusb_host 78d9000.ehci: USB 2.0 started, EHCI 1.00
[ 5.102060] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[ 5.106944] msm_cci_irq:1279 MASTER_0 error 0x8000000
[ 5.106969] ov5645 1-0078: ov5645_write_reg: write reg error -22: reg=3103, val=11
[ 5.106998] ov5645 1-0078: could not set init registers
[ 5.107003] ov5645 1-0078: ov5645_set_power_off: Enter
[ 5.107016] ov5645 1-0078: could not power up OV5645
[ 5.107140] ov5645: probe of 1-0078 failed with error -22

thanks

just solved it by setting “hardware flow control” to off, in minicom (ctrl+o->“serial port setup” → “F”)