Bug 1669359 - AVerMedia cx231xx no device video0
Summary: AVerMedia cx231xx no device video0
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: kernel   
(Show other bugs)
Version: 29
Hardware: x86_64
OS: Linux
Target Milestone: ---
Assignee: Kernel Maintainer List
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2019-01-25 02:35 UTC by piejacker875
Modified: 2019-03-23 06:51 UTC (History)
18 users (show)

Fixed In Version:
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Story Points: ---
Clone Of:
Last Closed:
Type: Bug
Regression: ---
Mount Type: ---
Documentation: ---
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Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
kernel: cx231xx 1-4:1.1: V4L2 device video0 deregistered (120.53 KB, text/plain)
2019-01-25 02:35 UTC, piejacker875
no flags Details

Description piejacker875 2019-01-25 02:35:48 UTC
Created attachment 1523397 [details]
kernel: cx231xx 1-4:1.1: V4L2 device video0 deregistered

1. Please describe the problem:
I'm not able to use my "AVerMedia DVD EZMaker 7" USB capture card

it appears in lsusb as
Bus 001 Device 003: ID 07ca:c039 AVerMedia Technologies, Inc.

From the kernel log it looks like the capture device /dev/video0 starts and then fails at usb 1-4: couldn't get decoder output pad for V4L I/O

2. What is the Version-Release number of the kernel:

3. Did it work previously in Fedora? If so, what kernel version did the issue
   *first* appear?  Old kernels are available for download at
   https://koji.fedoraproject.org/koji/packageinfo?packageID=8 :
worked in kernel-4.19.15-300.fc29.x86_64, stopped working in 4.20.0-0.rc0.git7.1.fc30.x86_64

4. Can you reproduce this issue? If so, please provide the steps to reproduce
   the issue below:
I had an OBS scene that was already set up to have /dev/video0 as a capture device. When booting up with the new kernel and launching OBS, the capture device outputs nothing, black screen. Usually the device outputs a solid blue screen when it's working and not capturing anything.

/dev/video0 isn't

5. Does this problem occur with the latest Rawhide kernel? To install the
   Rawhide kernel, run ``sudo dnf install fedora-repos-rawhide`` followed by
   ``sudo dnf update --enablerepo=rawhide kernel``:
The issue still occurs in 5.0.0-0.rc3.git0.1.fc30.x86_64

6. Are you running any modules that not shipped with directly Fedora's kernel?:
I think I have uinput module enabled

7. Please attach the kernel logs. You can get the complete kernel log
   for a boot with ``journalctl --no-hostname -k > dmesg.txt``. If the
   issue occurred on a previous boot, use the journalctl ``-b`` flag.

Comment 1 meltingrobot 2019-01-27 17:33:31 UTC
Same issue with two different USB tuner cards using the same driver. Hauppauge USB Live 2 and Elgato Video Capture V2.

Comment 2 Dave Krynick 2019-03-23 06:51:48 UTC
Same issue for Diamond One Touch Video Capture 

As a note, the patchwork.kernel.org web site shows a Linux kernel fix. Here is the url (offsite) - https://patchwork.kernel.org/patch/10763655/  However, I've never built a kernel from scratch and have no idea how to set this up and do this in Fedora. However, this information might help someone else work around the problem.

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