I was writing my first GUI in C++ on linux using wxwidgets and would erratically get this message:
./../src/xcb_lock.c:33: _XCBUnlockDisplay: Assertion `xcb_get_request_sent(dpy->xcb->connection) == dpy->request' failed
it did take a couple different forms (i think there was one other), but usually had a dpy->request in it and xcb_lock.c), but this one came up quite often. it was very erratic, and would sometimes keep my gui from coming up at all.
I ultimately (thanks to the help of people in #wxWidgets on freenode) figured out it was because wxWidgets is not thread safe and my worker thread was calling member functions of my GUI.
To fix this I added wxMutexGuiEnter() and wxMutexGuiExit() around my code that access the gui and all issues were resolved.
Thursday, October 22, 2009
Monday, June 29, 2009
Getting mail from gmail using fetchmail
So I wanted to setup RT on my ubuntu box. It's been rough so far, but I figured I'd document this as well.
First, I was running ubuntu 7.10 and needed to upgrade to 8.04. That was a bit tricky as i tried to do 'do-dist-upgrade' but it kept failing. I finally figured out it was because i had all the repositories in /etc/apt/sources.list enabled. Needed to pear it back to just be the first one in the file.
So, after I did that I was up to 8.04. From there, I grabbed the 'request-tracker3.6' package using apt-get. This is by far the best way to do this, as it gets everything else you need as well. These instructions were well chronicled at http://www.ubuntugeek.com/request-trackerrt-ticketing-system-for-your-support-group.html. I stupidly didn't setup the database, so got a lot of weird errors.
Next, to get email integration to work... I wanted to check a gmail mailbox for our domain. To do that you need to configure postfix, these instructions (scroll down to the end where it say "Fetchmail\nWhy Fetchmail") http://souptonuts.sourceforge.net/postfix_tutorial.html. One thing it misses is that you need to remember to copy the hashed links of your certs to /etc/ssl/certs.
I have yet to get rt-mailgate to work, though.
First, I was running ubuntu 7.10 and needed to upgrade to 8.04. That was a bit tricky as i tried to do 'do-dist-upgrade' but it kept failing. I finally figured out it was because i had all the repositories in /etc/apt/sources.list enabled. Needed to pear it back to just be the first one in the file.
So, after I did that I was up to 8.04. From there, I grabbed the 'request-tracker3.6' package using apt-get. This is by far the best way to do this, as it gets everything else you need as well. These instructions were well chronicled at http://www.ubuntugeek.com/request-trackerrt-ticketing-system-for-your-support-group.html. I stupidly didn't setup the database, so got a lot of weird errors.
Next, to get email integration to work... I wanted to check a gmail mailbox for our domain. To do that you need to configure postfix, these instructions (scroll down to the end where it say "Fetchmail\nWhy Fetchmail") http://souptonuts.sourceforge.net/postfix_tutorial.html. One thing it misses is that you need to remember to copy the hashed links of your certs to /etc/ssl/certs.
I have yet to get rt-mailgate to work, though.
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