On 2/4/2021 04:38, Rusty Nails wrote:
im having an issue in windows and linux/modemmanager with this rm510q.
It seems to start up then stop allowing at commands. any tips on how to
resolve this?
[93736.682684] option1 ttyUSB3: GSM modem (1-port) converter now
disconnected from ttyUSB3
[93736.682723] option 2-2:1.3: device disconnected
[93736.682853] cdc_mbim 2-2:1.4 wwan0: unregister 'cdc_mbim'
usb-0000:00:1d.7-2, CDC MBIM
[93746.221704] usb 2-2: new high-speed USB device number 27 using ehci-pci
This card draws more current than an USB 2.x (ehci) port can provide
which is 500mA at best, the card should be used in a USB 3.x port which
can provide at least 900mA.
You are getting resets and bus drop-outs because of the voltage drops
which occurs when the card draws more current than the port can provide.
/Lars
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