Arch Linux

tacostick

Member

Registered: 2010-07-20

Posts: 27

Problem Detecting Arduino Uno

Hey guys,

I just got an Arduino Uno and I'm having a blast with it. The problem is, when I plug it in...nothing happens. As in, `dmesg` reports absolutely no indication that there is now something in a USB port.

Strangely, if I reboot my computer and then immediately plug in the arduino, it works swimmingly...`dmesg` says

usb 5-2: new full speed USB device using uhci_hcd and address 2
cdc_acm 5-2:1.0: ttyACM0: USB ACM device
usbcore: registered new interface driver cdc_acm
cdc_acm: v0.26:USB Abstract Control Model driver for USB modems and ISDN adapters

and /dev/ttyACM0 is created, and as far as I can tell, it is recreated each time I unplug and plug in the arduino. So why does this work right after a reboot but not otherwise? Any ideas? My only hypothesis is that it's related to resuming from suspend to RAM, because a whole slew of shit goes wrong after resumes. I already have multiple scripts cleaning up after GNOME's resume process, so I imagine this will be one more.

Lemme know if you need any diagnostic output, and thanks!