Red Hat Bugzilla – Bug 120576
XDS causes screen blacking
Last modified: 2015-01-04 17:05:16 EST
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Description of problem:
Turning on XDS support in the config file or from within the program's
GUI causes the program to wait 2-10 seconds after a channel change,
then turn 90% black.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
4. toggle XDS
5. Make sure it says 'enabled'
6. Wait 10 seconds
7. Change the channel and its working again
8. Wait 10 seconds again
Actual Results: Tvtime output turns blackish
Expected Results: XDS shouldn't have an effect on the color
This bug exists in mandrake and RH, so is likely upstream.
I just upgraded from FC1 where I didn't have any problems with tvtime
at all. After upgrading I too an seeing the picture fade to black
(more like 99% black for me). This happens with XDS on or off,
doesn't make a difference.
I see the following error on the command line when the screen goes black:
videoinput: Can't read frame. Error was: Input/output error (975).
In addition the following errors are logged to syslog:
May 20 10:47:04 penguin kernel: bttv0: timeout: drop=227
irq=75976/75976, risc=24d5b07c, bits: VSYNC HSYNC OFLOW FDSR
May 20 10:47:04 penguin kernel: bttv0: reset, reinitialize
May 20 10:47:04 penguin kernel: bttv0: PLL can sleep, using XTAL
After removing tvtime and installing the package I used on FC1, which
I obtained from the DAG Weirs repo filename
tvtime-0.9.12-0.rhfc1.dag.i386.rpm I found the problem is still there.
This indicates to me that the problem is in the bttv, v4l, tvtuner or
related driver, not in the tvtime application.
However, on another system that was an FC1 -> FC2 upgrade that still
had the xawtv application I had no trouble at all with xawtv yet
tvtime would go black after a few seconds.
There is a long-standing problem with the version of bttv that ships
in 2.6 kernels where the card will reset itself if you use the VBI
device and capture video in tvtime. The problem does not exist in
bttv 0.7 that was shipped with 2.4 kernels. It was reported to the
bttv maintainer before 2.6 shipped, but he cannot reproduce it and the
bug still exists. When bttv resets, all of the colour controls are
reset to random values, resulting in a usually black or red screen.
The only known workaround at this time is to not use XDS or closed
captions in tvtime. If you can at all help with the debugging of this
problem, please contact the bttv maintainer (see
ok, it's a bug in bttv drvier. reassign to kernel.
what kernel version is this ?