From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <178188afe721fbb1d8ea8e3b63472d7d@hamnavoe.com>
To: 9fans@9fans.net
From: Richard Miller <9fans@hamnavoe.com>
Date: Tue, 31 May 2016 09:41:29 +0100
In-Reply-To: <9A3054B5-B852-4BDE-8D58-9DBE0BD93F89@quintile.net>
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Subject: Re: [9fans] More about /dev/draw
Topicbox-Message-UUID: 96402090-ead9-11e9-9d60-3106f5b1d025

steve@quintile.net:
> there seem to be a couple of lurking bugs in the sub driver which
> generate spurious grumbles and seem to prevent sub serial adapters
> from working, which is a minor annoyance. Other than that it works like a charm.

I've made some tweaks to usb which eliminated one spurious "port resumed"
message.  You might try updating your kernel if you haven't done so recently.
Dan Cross found a bug in the ftdi usbserial driver (not specific to 9pi)
which is fixed by /n/sources/patch/usbserial-ftdi-writelen - could that
be relevant for you?