Modem USB gets disconnected

Technical Support
21

Hi Frank,

Here is the results of the command lsusb:

Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 04b4:00f8 Cypress Semiconductor Corp. 
Bus 001 Device 005: ID 2c7c:0125  
Bus 001 Device 002: ID 1a40:0801 Terminus Technology Inc. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Cypress is the camera and modem’s ID is 2c7c:0125

Removing camera gives:

Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 2c7c:0125  
Bus 001 Device 002: ID 1a40:0801 Terminus Technology Inc. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Is there a way to check if the current on hub is exceeded ? And is this possible that temperature can have impact on this ?

For the context we run our computational intensive software on Khadas without fan so the temperature on Khadas can go up to ~75°C (on processor)

Thanks

22

For now I will say it’s pretty regular. However I will try to record the frequency and get back to you. Thank you

23

Can you try to power the Camera from any kind of other external power ?, but have the data alone still connected ?

24

@ptphucbk Can you show us a full dmesg log info ?

25

For now I haven’t been able to reproduce the problem yet. But when it comes I will send you a full dmesg log.

Thanks