Date: Sun, 6 Apr 2008 00:33:50 +0300 From: Andrei Kolu <antik@bsd.ee> To: freebsd-usb@freebsd.org Cc: freebsd-stable@freebsd.org Subject: Re: USB to RS232 converter problem (prolific chip) Message-ID: <200804060033.50609.antik@bsd.ee> In-Reply-To: <200804060024.39019.antik@bsd.ee> References: <200804052236.49472.antik@bsd.ee> <alpine.BSF.1.10.0804051447500.16912@wonkity.com> <200804060024.39019.antik@bsd.ee>
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On Sunday 06 April 2008 00:24:38 Andrei Kolu wrote: > On Saturday 05 April 2008 23:48:59 you wrote: > > On Sat, 5 Apr 2008, Andrei Kolu wrote: > > > I have problems using USB to RS232 converter under FreeBSD 6.3-STABLE > > > when connecting to any Cisco gear over serial link. I connect my > > > adapter to notebook and dmesg output looks like this one: > > > > > > ucom0: Prolific Technology Inc. USB-Serial Controller D, rev 1.10/4.00, > > > addr 2 > > > > > > I have also following modules loaded: > > > > > > 8 1 0xc0c17000 3540 umodem.ko# cu -l /dev/ttyU0 > > > Connected > > > > > > 9 4 0xc0c1b000 3208 ucom.ko > > > 10 1 0xc0c1f000 2f54 uplcom.ko > > > 13 1 0xc0c2f000 3384 ubsa.ko > > > > > > Now I try to connect to Cisco box: > > > > > > # cu -l /dev/ttyU0 > > > Connected > > > > Use /dev/cuaU0 instead. > > > > -Warren Block * Rapid City, South Dakota USA > > There is no difference if I connect through /dev/ttyU0 or /dev/cuaU0 and > even through ttyU1 or cuaU1 (when second serial converter is connected)- > same problem. I tried on other computer with FreeBSD 6.1 and 7.0-STABLE > snapshot from march- same results. > > Something is broken on FreeBSD side- strange thing is that when I turn > power down on cisco box and turn in on again then I see scrolling text from > cisco gear but there is no feedback to keyboard activity. How to debug this > issue? > Some progress on debugging! Just kiddin... I removed converter from USB and FreeBSD 7.0 kernel dumped following information: ucom0: ucomreadcb: IOERROR ucom0: at uhub1 port 1 (addr 2) disconnected ucom0: uplcom_set_line_status: STALLED Fatal trap 12: page fault while in kernel mode cpuid = 1; apic id = 01 fault virtual address = 0xb0 fault code = supervisor read data, page not present instruction pointer = 0x8:0xffffffff80446f72 stack pointer = 0x10:0xffffffffae796a00 frame pointer = 0x10:0xffffff000172b400 code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, long 1, def32 0, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 876 (cu) trap number = 12 panic: page fault cpuid: 1 Uptime: 8m41s Physical memory: 2802 MB Dumping 126 MB: 111 95 79 63 47 31 15 Dump complete
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