From: [email protected] To: [email protected] Date: Sat, 19 Jan 2013 19:26:58 -0500 CC: [email protected] Subject: Re: [ivtv-users] cx18 module causes freeze after kernel upgrade > From: [email protected] > To: [email protected] > Date: Sat, 19 Jan 2013 17:17:53 -0500 > CC: [email protected] > Subject: Re: [ivtv-users] cx18 module causes freeze after kernel upgrade > > On Fri, 2013-01-18 at 14:23 -0500, Kyle Lil wrote: > > I'm having trouble getting drivers installed for my Hauppauge HVR-1600 > > in recent kernels. In Mythbuntu 12.04, I first tried upgrading to 3.4 > > kernel or 3.3 kernel. After installing each of these, I booted into > > the new kernel, then downloaded and built a fresh copy of media_build > > from the git server. > > Why? What is wrong with the cx18 module (and supporting modules) in the > stock 3.4 or 3.3 kernel? For some reason, my HVR-1600 performs better with .qam_gain in cx18-dvb.c set to 0x01 instead of 0x02. See this thread (http://www.gossamer-threads.com/lists/ivtv/users/40784?do=post_view_flat#40784 thnaks to you and Devin Heitmueller for helping me troubleshoot that). Maybe things have improved with the driver and/or error handling in the mpeg players I'm using since then. I should really have given the stock kernel a try before attempting to patch it. > > FYI, the ^media_build^ is only a partial rebuild of the sources for the > latest ^media_tree^ kernel, with some backward compatability patches so > things at least compile. No guarantee that things are going to work. > > If you rebuild and install the ^media_tree^ kernel and all the modules, > then you will have the bleeding edge V4L-DVB modules with a vanilla > kernel. You will not have any security or valued added patches from > Cannonical, but you will have the bleeding edge V4L-DVB modules with > their intended kernel and they shouldn't crash. > Thanks for taking the time to explain this to me. For some reason, I assumed these modules would work with any kernel as long as they compiled. As luck would have it, a new Canonical kernel arrived today (3.5.0-22). I installed it and *did not* patch it. So far things look pretty good. > > On reboot, for both kernels, the system would hang. A bunch of trace > > information would scroll by and a hard reboot was required. (I'm not > > really sure how to retrieve that info). > > Take a picture with a digital camera and email direct to me: > [email protected] . If the "Code" bytes in the photo are not > readable, please transcribe them by hand (there are only 64 of them) and > send them as well. >> > > I thought the issue might have been related to using a newer kernel > > than the Ubuntu 12.04 repositories gave me. > > Maybe. I don't know from where media_build is picking up the kernel > headers. > > > > > So I upgraded to Ubuntu 12.10 (and kernel 3.5.0-21). Unfortunately, > > I'm having the same experience. If I install the media_build tree and > > try "sudo modprobe cx18", the system immediately hangs with no log > > output (that I know how to retrieve - I had tail -f /var/log/messages > > running in a separate terminal window) and again the system hangs > > during boot. > > During your experimentation blacklist the cx18 driver > in /etc/modprobe.d/blacklist.conf . That way on reboot, you get to > decide when your machine hangs by typing modprobe cx18 manually. > > > > The last good working kernel I have with v4l-dvb drivers is 3.2.0-32. > > > > > > Any help would be greatly appreciated. Please let me know if there is > > any additional info I can provide (or if there is a different list I > > should be sending to). > > Certainly, questions related to media_build should be directed to the > Linux media list: [email protected] . I don't use the > media_build backward-compatability build system, myself. > > Regards, > Andy > > Thanks again, Andy. I'll see how things look in the next few days and email the Linux media list if it looks like I still need that custom .qam_gain setting and I run into trouble installing the media tree kernel. Best, Kyle > > Thanks, > > Kyle > > > > > _______________________________________________ > ivtv-users mailing list > [email protected] > http://ivtvdriver.org/mailman/listinfo/ivtv-users _______________________________________________ ivtv-users mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-users So, unfortunately, I am getting a ton of errors as previously described in this thread (http://www.gossamer-threads.com/lists/ivtv/users/40784?do=post_view_flat#40784) with the stock kernel driver. Just to be sure I'm not overdoing things here, is there a way I can set the .qam_gain parameter without hard coding a new value in cx18-dvb.c and building a custom media-tree kernel? Best, Kyle
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