Hi All,
So I am seeing this appear over and over in the System Log, but my other Avalon boxes have no such problem:
Sun Aug 18 11:48:49 2013 auth.info kernel: [ 558.900000] usb 1-1: USB disconnect, device number 36
Sun Aug 18 11:48:49 2013 auth.info kernel: [ 558.910000] usb 1-1.1: USB disconnect, device number 37
Sun Aug 18 11:48:50 2013 auth.info kernel: [ 559.210000] usb 1-1: new high-speed USB device number 38 using ehci-platform
Sun Aug 18 11:48:50 2013 auth.info kernel: [ 559.380000] hub 1-1:1.0: USB hub found
Sun Aug 18 11:48:50 2013 auth.info kernel: [ 559.380000] hub 1-1:1.0: 2 ports detected
Sun Aug 18 11:48:50 2013 auth.info kernel: [ 559.660000] usb 1-1.1: new full-speed USB device number 39 using ehci-platform
Sun Aug 18 11:48:50 2013 auth.info kernel: [ 559.810000] ftdi_sio 1-1.1:1.0: FTDI USB Serial Device converter detected
Sun Aug 18 11:48:50 2013 auth.info kernel: [ 559.820000] usb 1-1.1: Detected FT232RL
Sun Aug 18 11:48:50 2013 auth.info kernel: [ 559.820000] usb 1-1.1: Number of endpoints 2
Sun Aug 18 11:48:50 2013 auth.info kernel: [ 559.820000] usb 1-1.1: Endpoint 1 MaxPacketSize 16384
Sun Aug 18 11:48:50 2013 auth.info kernel: [ 559.830000] usb 1-1.1: Endpoint 2 MaxPacketSize 16384
Sun Aug 18 11:48:50 2013 auth.info kernel: [ 559.830000] usb 1-1.1: Setting MaxPacketSize 64
Sun Aug 18 11:48:50 2013 auth.info kernel: [ 559.840000] usb 1-1.1: FTDI USB Serial Device converter now attached to ttyUSB0
Sun Aug 18 11:48:51 2013 auth.info kernel: [ 560.970000] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0
Sun Aug 18 11:48:51 2013 auth.info kernel: [ 560.990000] ftdi_sio 1-1.1:1.0: device disconnected
Sun Aug 18 11:49:12 2013 auth.info kernel: [ 581.570000] usb 1-1: USB disconnect, device number 38
Sun Aug 18 11:49:12 2013 auth.info kernel: [ 581.570000] usb 1-1.1: USB disconnect, device number 39
Sun Aug 18 11:49:12 2013 auth.info kernel: [ 581.880000] usb 1-1: new high-speed USB device number 40 using ehci-platform
Sun Aug 18 11:49:12 2013 auth.info kernel: [ 582.050000] hub 1-1:1.0: USB hub found
Sun Aug 18 11:49:12 2013 auth.info kernel: [ 582.050000] hub 1-1:1.0: 2 ports detected
I noticed that my box's hash rate started resetting to 0 MH/s and then climbing back up to 70 or so. It did this once before right when I first got my Avalon and I couldn't figure out why. I moved the box around a bit and the issue went away ever since.
Fast forward a month: I had to re-arrange some hardware recently and my Avalon ran fine for a day, then stopped hashing last night. I restarted it and then it ran fine for several hours. When I log in, I see the above in the logs, the 5 second average hash rate climbs up to the 70 or so GH/s then resets to 0 and repeats.
It seems to me that maybe I have a bad hub connection judging by the logs. Currently I have it set to run at 300 MHz, but it has no problems hitting 345 MHz and ran for a month just fine before I moved it around. WiFi is disabled, etc.
Anyone else experienced problems like this? How did you resolve it?