kern/56245: Distorted and choppy video with bktr-driver on 5.x

[Guido Berhoerster]

>Number:         56245
>Category:       kern
>Synopsis:       Distorted and choppy video with bktr-driver on 5.x
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Aug 31 12:40:08 PDT 2003
>Closed-Date:
>Last-Modified:
>Originator:     Guido Berhoerster
>Release:        FreeBSD 5.1-CURRENT i386
>Organization:
>Environment:
FreeBSD 5.0-RELEASE, 5.1-RELEASE, -CURRENT

Relevant dmesg-output:
bktr0: <BrookTree 878> mem 0xd7000000-0xd7000fff irq 9 at device 10.0 on pci0
bktr0: Hauppauge Model 44354 C242
bktr0: Detected a MSP3415G-B8 at 0x80
bktr0: Hauppauge WinCast/TV, Philips FR1216 PAL FM tuner, msp3400c stereo, remote control.

	
>Description:
I have Problems with bktr-driver on 5.x, with fxtv the video-
output is distorted and choppy, it appears that only odd
scanlines are redrawn regularly while even scanlines remain for
half a second as "ghost images". When the fxtv window is
overlapped by some other window the video is only updated about
every 30 seconds. When using mplayer's bsdbt848-driver I get an
undistorted image but also choppy video. I wasn't able to test it
with xawtv since it is still broken on 5.x.
This is a regression over 4.x, where everything works flawlessly.
I have done some testing with different versions. I can was able
to reproduce the problem on:
-FreeBSD 5.0-RELEASE
-FreeBSD 5.1-RELEASE
-FreeBSD CURRENT
-NetBSD 1.6.1

However it does does not occur on:
-FreeBSD 4.3-RELEASE up to 4.8
-FreeBSD STABLE

I assume the problem lies within the bktr-driver since it also
occurs on NetBSD and it must be something which has been changed
in -CURRENT before 5.0-RELEASE and not MFC'ed yet because -STABLE
still works fine.
	
>How-To-Repeat:
Try fxtv or mplayer on given FreeBSD/NetBSD versions and
hardware.
	
>Fix:
n/a
	


>Release-Note:
>Audit-Trail:
>Unformatted: