USB-to-serial adapter no longer working in 8.0-RC1
gcr+freebsd-current at tharned.org
Sat Sep 19 03:40:31 UTC 2009
Last May, Hans Petter Selasky fixed up the umct driver for 8.0-CURRENT
After updating to 8.0-RC1 I find that the driver has a new problem.
Testing with cu(1) and a modem, I can see by watching the lights on the
modem and on the usb-serial adapter that it still asserts DTR and sends
and receives characters properly, but no characters reach the terminal.
That seems to be the only problem: characters from the attached serial
device seem to disappear before reaching whatever program has the serial
device open. But strangely enough, power cycling the modem results in a
few "line noise" characters appearing. Perhaps the driver is no longer
responding appropriately to DSR?
Any insight or troubleshooting clues would be much appreciated.
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