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[Lcdproc] lcdproc v0.5.3 - ConnectionType=ftdi [[ Segmentation fault ]]


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  • From: santanu at hep.phy.cam.ac.uk (Santanu Das)
  • Subject: [Lcdproc] lcdproc v0.5.3 - ConnectionType=ftdi [[ Segmentation fault ]]
  • Date: Sat, 23 Oct 2010 20:39:59 +0100
Hi Markus,

How do I know for sure if I have that chip? I see stuff about FTDI in the
dmsg, lsusb lists the device as:
Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC
/dev/ttyUSB0 also points to the FYDI_FT232R thing:
lrwxrwxrwx 1 root root 13 2010-10-21 10:07
usb-FTDI_FT232R_USB_UART_A600dyfH-if00-port0 -> ../../ttyUSB0
So, do I actually have one FTDI chip? I actually tried mplay connection type
before; it didn't work either.
Any other suggestion(s)?

Cheers,
Santanu
On 23 Oct 2010, at 13:31, "Markus Dolze" <bsdfan at nurfuerspam.de> wrote:

> Hello Santanu,
>
> please note that the hd44780 FTDI connection type is for use with FT2232 or
> FT245 FIFO chips and requires special wiring. Unless you know that your
> MPlay device makes use of these, the hd44780 ftdi connection is probably
> not what you are looking for.
>
> You may try hd44780's 'mplay' connection type instead.
>
> See http://lcdproc.sourceforge.net/docs/lcdproc-0-5-3-user.html#drivers for
> more information.
>
> Regards
> Markus
>
> -------- Original-Nachricht --------
>> Datum: Fri, 22 Oct 2010 10:23:15 +0100
>> Von: Santanu Das <santanu at hep.phy.cam.ac.uk>
>> An: lcdproc at lists.omnipotent.net
>> Betreff: Re: [Lcdproc] lcdproc v0.5.3 - ConnectionType=ftdi [[
>> Segmentation fault ]]
>
>> Okay, I have the backtrace now:
>>
>> root at htpc:/usr/local/etc# gdb LCDd
>> GNU gdb (GDB) 7.1-ubuntu
>> Copyright (C) 2010 Free Software Foundation, Inc.
>>
>> [ .... ]
>>
>> Reading symbols from /usr/local/sbin/LCDd...(no debugging symbols
>> found)...done.
>> (gdb) run
>> Starting program: /usr/local/sbin/LCDd
>> LCDd version 0.5.3 starting
>> Built on Oct 22 2010, protocol version 0.3, API version 0.5
>> Using Configuration File: /usr/local/etc/LCDd.conf
>> Set report level to 5, output to stderr
>> LCDd 0.5.3, LCDproc Protocol 0.3
>> Part of the LCDproc suite
>> Copyright (C) 1998-2009 William Ferrell, Scott Scriven
>> and many other contributors
>>
>> [ ... ]
>>
>> Server running in foreground
>> Listening for queries on 127.0.0.1:13666
>> screenlist_init()
>> driver_load(name="hd44780",
>> filename="/usr/local/lib/lcdproc/hd44780.so")
>> HD44780: using ConnectionType: ftdi
>> HD44780: Matrix key 3 0: "Enter"
>> HD44780: Matrix key 3 1: "Up"
>> HD44780: Matrix key 3 2: "Down"
>> HD44780: Matrix key 3 3: "Escape"
>> hd44780: Using hd44780_default charmap
>>
>> Program received signal SIGSEGV, Segmentation fault.
>> 0x00007ffff743e5a7 in usb_control_msg () from /lib/libusb-0.1.so.4
>> (gdb) bt
>> #0 0x00007ffff743e5a7 in usb_control_msg () from /lib/libusb-0.1.so.4
>> #1 0x00007ffff72367bf in ftdi_enable_bitbang () from
>> /usr/lib/libftdi.so.1
>> #2 0x00007ffff764f08c in hd_init_ftdi () from
>> /usr/local/lib/lcdproc/hd44780.so
>> #3 0x00007ffff764a6f3 in HD44780_init () from
>> /usr/local/lib/lcdproc/hd44780.so
>> #4 0x0000000000411957 in driver_load ()
>> #5 0x0000000000410bd1 in drivers_load_driver ()
>> #6 0x00000000004084ee in main ()
>>
>>
>> Something went wrong during the compilation? Thanks in advance.
>>
>> Cheers,
>> Santanu
>>
>>> On 22/10/2010 08:08, Thomas Jarosch wrote:
>>>> On Thursday, 21. October 2010 20:59:41 Santanu Das wrote:
>>>>> 4275.263767] LCDd[1537]: segfault at 0 ip 00007f49ac5aa5a7 sp
>>>>> 00007fff4fc1f4d0 error 4 in libusb-0.1.so.4.4.4[7f49ac5a7000+7000]
>>>>>
>>>>> does it help debugging at all? Can anyone please help?
>>>> Do you get a core dump or would you be able to
>>>> run it inside gdb and get a backtrace?
>>>>
>>>> That would help the most.
>>>>
>>>> Cheers,
>>>> Thomas
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>>>
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>>

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