Bug 1173952

Summary:	video freeze on switching channels
Product:	[Fedora] Fedora	Reporter:	Stas Sergeev <stsp2>
Component:	xawtv	Assignee:	Dmitry Butskoy <dmitry>
Status:	CLOSED DUPLICATE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	unspecified
Version:	21	CC:	dmitry, mchehab
Target Milestone:	---
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2014-12-27 23:25:24 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Stas Sergeev 2014-12-14 12:45:01 UTC

Description of problem:
I used xawtv for many years without problems.
After upgrade to F21, I can no longer switch channels.
Whatever channel was set when xawtv started, displays
fine. But when I switch the channel, the image freezes.
The sound, however, changes fine. If I restart xawtv,
it will properly display the channel to which I switched.

Version-Release number of selected component (if applicable):
xawtv-3.103-4.fc21.x86_64
(worked on the latest from F19, not tried on F20)

How reproducible:
Easily

Steps to Reproduce:
1. start xawtv
2. make sure the disaplay is fine
3. switch channel

Actual results:
Video freezes, only sound changes

Expected results:
Both sound and video changes.

Additional info:
Verified with tvtime: switching works fine.
Unfortunately tvtime does not support sound, so I have
to stick to xawtv...

Comment 1 Stas Sergeev 2014-12-14 17:00:08 UTC

ioctl: VIDIOC_REQBUFS(count=0;type=VIDEO_CAPTURE;memory=MMAP): Device or resource busy
ioctl: VIDIOC_REQBUFS(count=2;type=VIDEO_CAPTURE;memory=MMAP): Device or resource busy
Warning: Non-character code(s) in source.
Warning: Non-character code(s) in source.
ioctl: VIDIOC_QBUF(index=0;type=VIDEO_CAPTURE;bytesused=221184;flags=0x2003 [MAPPED,QUEUED,(null)];field=BOTTOM;;timecode.type=0;timecode.flags=0;timecode.frames=0;timecode.seconds=0;timecode.minutes=0;timecode.hours=0;timecode.userbits="";sequence=0;memory=MMAP): Device or resource busy
libv4l2: error dequeuing buf: Device or resource busy
ioctl: VIDIOC_DQBUF(index=0;type=VIDEO_CAPTURE;bytesused=0;flags=0x0 [];field=ANY;;timecode.type=0;timecode.flags=0;timecode.frames=0;timecode.seconds=0;timecode.minutes=0;timecode.hours=0;timecode.userbits="";sequence=0;memory=MMAP): Device or resource busy
ioctl: VIDIOC_REQBUFS(count=0;type=VIDEO_CAPTURE;memory=MMAP): Device or resource busy
v4l2: read: Invalid argument


What can this mean?
Maybe xawtv now tries to open the new channel somehow
before closing the previous one? Just a wild guess.

Comment 2 Stas Sergeev 2014-12-27 19:12:32 UTC

The fix is posted:
https://bugzilla.redhat.com/show_bug.cgi?id=1155784#c5

Comment 3 Dmitry Butskoy 2014-12-27 23:25:24 UTC


*** This bug has been marked as a duplicate of bug 1155784 ***