Re: system hang in bttv driver on modprobe. PCI problem?

[Peter Silva <peter@xxxxxxxxxxxxxxxxxxxx>]

Joao Vieira wrote:

> Don`t take me wrong, but have you tried to use a #
> monitor video card?
I have a LAN, so I set the BIOS not to complain, then
removed my sound and video cards physically.  I booted it
up, then rlogged into the system, and did modprobe.   It still hangs, no 
change.

I do not think it is a display problem.  after modprobe,
It does not answer to ping, and existing network connections hang.


> I think I experienced something similar a few weeks
> ago after I made my first Linux install:) using a S3
> agp card.  After reinstalling several times and making
> sure I was not doing nothing wrong, I decided to try
> another video card (NVidia 16 mg) and since then
> everything has been running smoothly...I found that
> only some versions of the x server support hardware
> acceleration and not all the video cards support this
> feature, so this could be your starting point.
>
> I hope that helps
>
> Joao
> --- Peter Silva <peter@xxxxxxxxxxxxxxxxxxxx> wrote:
>  
>
> > I hope someone can point me in the direction of some
> > help.  The problem
> > is easy to reproduce, but I have no error messages,
> > just the system
> > locks up solid (no oops!) I have SGI KDB installed
> > and functional but it
> > does not come up when the hang occurs either.
> >
> > Versions:
> >    started with redhat 7.3  standard kernel
> > (2.4.18++, with bttv 0.7.xxx)
> >    then tried 2.4.19 linus tree with v4l2 &
> > bttv-0.8.45... no change.
> >
> > I started editing the bttv driver. and noticed that
> > it hangs in the file 
> > bttv-driver.c in the init_bt848 routine at the line
> > which does 
> > "btwrite(val,BT848_E_SCLOOP);"  If I comment out the
> > line, it will hang 
> > on the next line, If I comment that one, it will
> > hang on the one after 
> > that, etc...
> >
> > These lines to write to registers on the ATI TV
> > Wonder Card (PCI id 
> > 00:09.0 which has a BT878A chip on it.)  It seems
> > able to do a couple of 
> > writes and then hang.
> >
> > grumpy% lspci
> > 00:00.0 Host bridge: VIA Technologies, Inc.
> > VT82C693A/694x [Apollo 
> > PRO133x] (rev c2)
> > 00:01.0 PCI bridge: VIA Technologies, Inc.
> > VT82C598/694x [Apollo 
> > MVP3/Pro133x AGP]
> > 00:04.0 ISA bridge: VIA Technologies, Inc. VT82C596
> > ISA [Mobile South] 
> > (rev 12)
> > 00:04.1 IDE interface: VIA Technologies, Inc. Bus
> > Master IDE (rev 06)
> > 00:04.2 USB Controller: VIA Technologies, Inc. USB
> > (rev 08)
> > 00:04.3 Host bridge: VIA Technologies, Inc. VT82C596
> > Power Management 
> > (rev 20)
> > 00:09.0 Multimedia video controller: Brooktree
> > Corporation Bt878 Video 
> > Capture (rev 11)
> > 00:09.1 Multimedia controller: Brooktree Corporation
> > Bt878 Audio Capture 
> > (rev 11)
> > 00:0b.0 Multimedia audio controller: Creative Labs
> > SB Live! EMU10k1 (rev 08)
> > 00:0b.1 Input device controller: Creative Labs SB
> > Live! MIDI/Game Port 
> > (rev 08)
> > 00:0e.0 Ethernet controller: 3Com Corporation 3c905B
> > 100BaseTX [Cyclone] 
> > (rev 30)
> > 01:00.0 VGA compatible controller: Matrox Graphics,
> > Inc. MGA G400 AGP 
> > (rev 04)
> > grumpy%
> >
> > I would appreciate any ideas on how to proceed, or
> > pointers to people 
> > who might be willing to help.
> >
> > Thank you.
> >
> > Peter
> >
> >
> >
> >
> >
> >
> > _______________________________________________
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> >
> >    
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