ports/64538: xawtv fails to refresh half of the scanlines

[Vlad Manilici]

>Number:         64538
>Category:       ports
>Synopsis:       xawtv fails to refresh half of the scanlines
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-ports-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Mar 21 07:10:06 PST 2004
>Closed-Date:
>Last-Modified:
>Originator:     Vlad Manilici
>Release:        5.2.1
>Organization:
>Environment:
$ uname -a
FreeBSD <hostname> 5.2.1-RELEASE-p3 FreeBSD 5.2.1-RELEASE-p3 #7: Sat Mar 20 23:20:03 CET 2004     root@<hostname>:/usr/obj/usr/src/sys/<kernel>  i386
$ pkg_info|grep xawtv
xawtv-3.91_4        A TV viewing application and a few TV utilities

>Description:
After doing yesterday a cvsup & make buildkernel, buildworld & portupdate, xawtv ceased to work properly, as it did before. When it starts, in a small window, everything is ok. When changing the window size, or turning to fullscreen (=640X480), xawtv shows a horrible lag for half of the scanlines (cannot tell if odd or even). The other half seems to be updated timely.

I tried this with/without the proprietary NVidia driver, and also tried
earlier versions (packages from 5.1 and 4.9). None seemed to work. All this might sugest an environment problem, which I could not localize.

Here is the relevant dmesg output:

..
Preloaded elf module "/boot/kernel/nvidia.ko" at 0xc0a2121c.
..
CPU: AMD Athlon(tm) Processor (999.72-MHz 686-class CPU)
  Origin = "AuthenticAMD"  Id = 0x642  Stepping = 2
  Features=0x183f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PS
E36,MMX,FXSR>
  AMD Features=0xc0440000<RSVD,AMIE,DSP,3DNow!>
real memory  = 268353536 (255 MB)
avail memory = 250957824 (239 MB)
..
nvidia0: <RIVA TNT2 Model 64/Model 64 Pro> mem 0xe4000000-0xe5ffffff,0xe1000000-0xe1
ffffff irq 11 at device 0.0 on pci1
..
bktr0: <BrookTree 878> mem 0xe3000000-0xe3000fff irq 9 at device 13.0 on pci0
bktr0: Hauppauge Model 44804 C148
bktr0: Warning - Unknown Hauppauge Tuner 0x30
bktr0: Hauppauge WinCast/TV, Philips PAL I tuner.
..
>How-To-Repeat:
start xawtv in fullscreen
>Fix:
unknown
>Release-Note:
>Audit-Trail:
>Unformatted: