On Monday 31 January 2011 21:06:27 Hans Petter Selasky wrote:
On Monday 31 January 2011 20:59:21 Peter Jeremy wrote:
I use a Huawei E176 on FreeBSD 8.1 for portable 3G connectivity.
Occasionally, ppp(8) reports:
Phase: deflink: read (2): Got zero bytes
Phase: deflink: open - lcp
and ppp(8) brings the link down. Trying to restart the link shows
that the E176 still thinks the link is up (entering 'term' and then
'~p' restores connectivity). grog@ has similar problems with an E1762.
Can anyone suggest why u3g(4) is incorrectly reporting EOF to an
application?
Hi,
Try enabling u3g debugging.
sysctl hw.usb.u3g.debug=15
This might require compiling a kernel having:
options USB_DEBUG
Maybe the zero length data comes from USB. Else it is a TTY problem.
Reference:
sys/dev/usb/serial/usb_serial.c:ucom_put_data()
There is already a check there for zero length data, so I guess the problem is
in the TTY layer.
--HPS
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