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
