Still no serial speech with 32-bit Wheezy

John G. Heim jheim at
Tue May 28 09:38:38 EDT 2013

It has been some time since I looked at the code butI don't think the 32 
bit code was different from the 64 bit code. I think they both had the 
same bug. I wrote a patch for the 2.6 kernel code. But I think it got 
fixed for real for kernel 3.2. I could probably dig up my 2.6 patch if 
someone needs it but I don't even use it myself any more. I just use 
either a 2.6.32 kernel or a 3.2 kernel.

PS: some of the earlier 3.2 kernels also had the bug. But the stock 
debian, ubuntu, and grml kernels do not have it any more.

On 05/28/13 05:48, covici at wrote:
> Because they made some changes which causes a particular return code
> when trying to get the serial port, but if you make the change it still
> will work.  Its a workaround because it does not really solve the
> problem, but it gets us by till we can really fix things.
> Tony Baechler <tony at> wrote:
>> No, I haven't.  Why should I?  It works great on my 64-bit Linux with the
>> 2.6.32 kernel.  I used it a couple of times today.  I must say that Linux
>> is much faster at copying files to my SD cards.  If you can give me some
>> idea why 32-bit kernel 3.2 wouldn't find the serial ports when 64-bit
>> kernel 2.6.32 does, I'm most interested.
>> On 5/27/2013 6:40 PM, acollins at wrote:
>>> HiTony.  Have you looked at /proc/ports to see if your serial ports
>>> are being registered?  If not, have you looked to make sure you don't
>>> have a serial port module that needs to be  loaded?  Just a couple of
>>> thoughts.
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John G. Heim, 608-263-4189, jheim at

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