My FreeRunner???s USB port still works for power, but not data?
guru at unixarea.de
Wed Mar 3 22:46:56 CET 2010
El día miércoles, marzo 03, 2010 a las 11:19:35 -0800, Brolin Empey escribió:
> Brolin Empey wrote:
> >Now my FreeRunner???s USB port works for power, so I can
> > still charge the battery, but not for communications, so I think a
> > solder connection must have come undone. I need to try disassembling my
> > FreeRunner to check the connections for the USB connector so I can ask
> > someone at work to fix (resolder) the connection, but I have not yet
> > done so. It must be a hardware problem because QtMoko can still charge,
> > but nothing happens when I connect USB devices to my FreeRunner: no
> > kernel modules are automatically loaded, there are no kernel messages.
> > Manually loading the kernel modules (e.g., dm9601 for my USB???Ethernet
> > adapter) for the USB device does not help. It is not because of the
> > electrical/logical USB host/device setting because I checked that; I
> > know how to use sysfs to change it.
> Update: I disassembled my FreeRunner; everything looks OK. I did not
> try using a digital multimeter to test the continuity between the data
> pins in the USB socket and the connections between the USB socket and
> the PCB, though. I noticed pin 4 (ID) of the 5-pin mini USB F connector
> (socket) does not appear to contact pin 4 on the male connector (the
> plug on the cable). Is this normal?
> I have fully reassembled my FreeRunner; it still works, except for USB
> data. However, now I really think this is a hardware problem because
> the behaviour is the same when my FreeRunner is running U-Boot from NOR,
> U-Boot from NAND, or QtMoko from NAND. When I connect my FreeRunner to
> my Windows 7 laptop, Windows 7 displays a balloon notification saying
> ???USB Device Not Recognized: One of the USB devices attached to this
> computer has malfunctioned, and Windows does not recognize it.???. When I
> connect my FreeRunner to a tower PC running Ubuntu v8.10 Desktop Edition
> i386, Linux detects a new full-speed USB device, but does not
> specifically detect a FreeRunner. lsusb lists no connected devices.
> This is normal because this PC is headless, but it should still list the
> FreeRunner if Linux detects the FreeRunner specifically instead of
> detecting only a generic full-speed USB device.
I have had the same problem some weeks ago and it was just
a broken USB cable (the one this comes with the FR), it works
with any other USB cable.
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