[PyKDE] Re: Problem with Socket Inter-Process Communication preventing HPLIP from faxing

Till Kamppeter till.kamppeter at gmail.com
Thu Oct 19 15:39:28 BST 2006

Additional info from Donald Welch:

Thanks Till. I worked on this for a few hours last night and I am fairly
confident there is a problem with QSocketNotifier in PyQt 3.16. PyQt
3.14works OK. I will be testing with
3.15 today.


Till Kamppeter wrote:
> Hi,
> I have a problem with HPLIP and PyQt (python-qt) 3.16. With the update 
> from 3.14 to 3.16 on Ubuntu Edgy the fax functionality (and perhaps also 
> other functions) of HPLIP stopped to work. Mandriva 2007 still uses PyQt 
> 3.14 and there faxing with HPLIP works.
> HPLIP uses sockets to let the daemon (hpssd) pass data of a print job 
> sent into a fax queue to the fax GUI (hp-sendfax). The fax GUI does not 
> receive this data when PyQt 3.16 is used, but it receives and processes 
> the data correctly when PyQt 3.14 is used.
> HPLIP versions are 1.6.7, 1.6.9, and 1.6.10.
> Tested operating systems:
> Mandriva 2007 (PyQt 3.14): works
> Ubuntu Dapper/6.06 (PyQt 3.14): works
> Ubuntu Edgy/6.10 (PyQt 3.16): fails
> So there is a regression from Ubuntu Dapper to Edgy, faxing 
> functionality for HP's MF devices gets lost.
> See also the Ubuntu bug report on this:
> https://launchpad.net/distros/ubuntu/+source/python-qt3/+bug/66830
> As Ubuntu is already in freeze for the final Edgy, it would be great if 
> the problem could be fixed by a small patch.
> I am grateful for any kind of help.
>    Till

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