Re: BTTV broken on recent kernels

From: Bob Gill <gillb4@telusplanet.net>
To: Alistair John Strachan <s0348365@sms.ed.ac.uk>
Cc: Linux kernel Mailing list <linux-kernel@vger.kernel.org>
Subject: Re: BTTV broken on recent kernels
Date: Mon, 16 Jan 2006 19:10:06 -0700	[thread overview]
Message-ID: <43CC51FE.7090907@telusplanet.net> (raw)
In-Reply-To: <200601160418.44549.s0348365@sms.ed.ac.uk>

Alistair John Strachan wrote:

>On Monday 16 January 2006 02:05, Bob Gill wrote:
>  
>
>>Hi.  The last several kernel versions have led to broken bttv (up to 4
>>or 5 kernel versions ago, I could watch tv on either mplayer or xawtv),
>>but lately bttv is broken.  My card is an 'bt878 compatible built by ATI
>>(ATI TV Wonder VE).  I'm pretty certain it worked as late as
>>2.6.14-git7.  I've peeked around /Changes and didn't see anything.   I'm
>>using the same build script as before, and a piece of lsmod shows
>>serial_core            14848  1 8250
>>rtc                     9524  0
>>tuner                  36908  0
>>bttv                  148564  0
>>video_buf              15748  1 bttv
>>compat_ioctl32          1152  1 bttv
>>i2c_algo_bit            7432  1 bttv
>>v4l2_common             6528  2 tuner,bttv
>>btcx_risc               3720  1 bttv
>>ir_common               7812  1 bttv
>>tveeprom               12304  1 bttv
>>i2c_core               14864  4 tuner,bttv,i2c_algo_bit,tveeprom
>>videodev                6912  1 bttv
>>snd_emu10k1            94628  2 snd_emu10k1_synth
>>..........also, a chunk of lspci shows:
>>0000:00:09.1 Input device controller: Creative Labs SB Live! MIDI/Game
>>Port (rev 07)
>>0000:00:0b.0 Multimedia video controller: Brooktree Corporation Bt878
>>Video Capture (rev 02)
>>0000:00:0b.1 Multimedia controller: Brooktree Corporation Bt878 Audio
>>Capture (rev 02)
>>....it's just that I get a blank (screen blanking due to no signal)
>>screen when I start a tv application.  I can try to change channels/tune
>>frequencies, and it looks like the applications are trying, but nothing
>>gets tuned in.   To be fair, I must mention that I *ahem* taint the
>>kernel with Nvidia stuff, and recently upgraded gcc (although it has
>>always worked well with tainted kernel, and it broke before I upgraded
>>gcc (to gcc version 4.0.2) on Debian Sarge. 
>>    
>>
>
>This problem sounds suspiciously like an overlay bug, known in the binary 
>NVIDIA driver. Please try changing it to "nv" in XF86Config, then restarting 
>your TV application..
>
>  
>
>>If you *really* want, I can 
>>revert XF86Config to use non-nvidia drivers (and revert back to the old
>>version of gcc) and give a bug report from that, but I suspect things
>>will remain broken.  Mplayer compiles very well with the new version of
>>gcc, and the new kernel (buit with the new version of gcc) does
>>everything else (sound, firewire, cd/dvd/networking, disk I/O etc.)
>>without problems.
>>Thanks in advance,
>>Bob
>>    
>>
>
>  
>
Alistair, Lee: thank you for your replies.  Sadly the bug is in the 
Nvidia binary.  Changing the driver to nv from nvidia did resolve the 
issue.  Now I have to decide whether I like accelerated 3d more, or 
using the tv tuner more (till Nvidia fixes the driver).  Thank you for 
your time.  I won't waste any more LKML bandwidth on this (Nvidia bug).  
Thanks again.
Bob