[linux-uvc-devel] guvcview crashes with latest ubuntu 14.10

[bzb.dev001]

guvcview crashes when used with my laptop's built-in webcam. Could
someone take a look at the below console output and give some insight.
I've done some research and have found that this problem has been
reported by others as well. Don't know if it directly relates to mine.
http://ubuntuforums.org/showthread.php?t=2251286
Thanks in advance.

$ uname -a
Linux zzz 3.16.0-30-generic #40-Ubuntu SMP Mon Jan 12 22:06:37 UTC 2015
x86_64 x86_64 x86_64 GNU/Linux

$ lspci
00:00.0 Host bridge: Intel Corporation Haswell-ULT DRAM Controller (rev 0b)
00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT
Integrated Graphics Controller (rev 0b)
00:03.0 Audio device: Intel Corporation Haswell-ULT HD Audio Controller
(rev 0b)
00:14.0 USB controller: Intel Corporation 8 Series USB xHCI HC (rev 04)
00:16.0 Communication controller: Intel Corporation 8 Series HECI #0
(rev 04)
00:1b.0 Audio device: Intel Corporation 8 Series HD Audio Controller
(rev 04)
00:1c.0 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 1
(rev e4)
00:1c.1 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 2
(rev e4)
00:1c.2 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 3
(rev e4)
00:1c.5 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 6
(rev e4)
00:1d.0 USB controller: Intel Corporation 8 Series USB EHCI #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation 8 Series LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation 8 Series SATA Controller 1
[AHCI mode] (rev 04)
00:1f.3 SMBus: Intel Corporation 8 Series SMBus Controller (rev 04)
08:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 07)
09:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8723BE
PCIe Wireless Network Adapter

$ lsusb
Bus 001 Device 004: ID 0bda:5776 Realtek Semiconductor Corp.
Bus 001 Device 003: ID 0bda:b001 Realtek Semiconductor Corp.
Bus 001 Device 002: ID 8087:8000 Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

$ guvcview
guvcview 1.7.3
file guvcview_video.mkv has extension type 1
file guvcview_image.jpg has extension type 0

** (guvcview:6149): WARNING **: Error retrieving accessibility bus
address: org.freedesktop.DBus.Error.ServiceUnknown: The name
org.a11y.Bus was not provided by any .service files
file guvcview_image.jpg has extension type 0
Video file suffix detected: 0
Image file suffix detected: 0
ALSA lib pcm_dsnoop.c:618:(snd_pcm_dsnoop_open) unable to open slave
ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
video device: /dev/video0
vid:0bda
pid:5776
driver:uvcvideo
device doesn't seem to support uvc H264 (0)
Init. HP Truevision HD (location: usb-0000:00:1d.0-1.5)
{ pixelformat = 'YUYV', description = 'YUV 4:2:2 (YUYV)' }
{ discrete: width = 640, height = 480 }
Time interval between frame: 1/30,
{ discrete: width = 160, height = 120 }
Time interval between frame: 1/30,
{ discrete: width = 176, height = 144 }
Time interval between frame: 1/30,
{ discrete: width = 320, height = 240 }
Time interval between frame: 1/30,
{ discrete: width = 352, height = 288 }
Time interval between frame: 1/30,
{ discrete: width = 640, height = 360 }
Time interval between frame: 1/30,
{ discrete: width = 1280, height = 720 }
Time interval between frame: 1/10,
{ pixelformat = 'MJPG', description = 'MJPEG' }
{ discrete: width = 640, height = 480 }
Time interval between frame: 1/30,
{ discrete: width = 160, height = 120 }
Time interval between frame: 1/30,
{ discrete: width = 176, height = 144 }
Time interval between frame: 1/30,
{ discrete: width = 320, height = 240 }
Time interval between frame: 1/30,
{ discrete: width = 352, height = 288 }
Time interval between frame: 1/30,
{ discrete: width = 640, height = 360 }
Time interval between frame: 1/30,
{ discrete: width = 1280, height = 720 }
Time interval between frame: 1/30,
{ pixelformat = 'RGB3', description = 'RGB3' }
{ discrete: width = 640, height = 480 }
Time interval between frame: 1/30,
{ discrete: width = 160, height = 120 }
Time interval between frame: 1/30,
{ discrete: width = 176, height = 144 }
Time interval between frame: 1/30,
{ discrete: width = 320, height = 240 }
Time interval between frame: 1/30,
{ discrete: width = 352, height = 288 }
Time interval between frame: 1/30,
{ discrete: width = 640, height = 360 }
Time interval between frame: 1/30,
{ discrete: width = 1280, height = 720 }
Time interval between frame: 1/30,
{ pixelformat = 'BGR3', description = 'BGR3' }
{ discrete: width = 640, height = 480 }
Time interval between frame: 1/30,
{ discrete: width = 160, height = 120 }
Time interval between frame: 1/30,
{ discrete: width = 176, height = 144 }
Time interval between frame: 1/30,
{ discrete: width = 320, height = 240 }
Time interval between frame: 1/30,
{ discrete: width = 352, height = 288 }
Time interval between frame: 1/30,
{ discrete: width = 640, height = 360 }
Time interval between frame: 1/30,
{ discrete: width = 1280, height = 720 }
Time interval between frame: 1/30,
{ pixelformat = 'YU12', description = 'YU12' }
{ discrete: width = 640, height = 480 }
Time interval between frame: 1/30,
{ discrete: width = 160, height = 120 }
Time interval between frame: 1/30,
{ discrete: width = 176, height = 144 }
Time interval between frame: 1/30,
{ discrete: width = 320, height = 240 }
Time interval between frame: 1/30,
{ discrete: width = 352, height = 288 }
Time interval between frame: 1/30,
{ discrete: width = 640, height = 360 }
Time interval between frame: 1/30,
{ discrete: width = 1280, height = 720 }
Time interval between frame: 1/30,
{ pixelformat = 'YV12', description = 'YV12' }
{ discrete: width = 640, height = 480 }
Time interval between frame: 1/30,
{ discrete: width = 160, height = 120 }
Time interval between frame: 1/30,
{ discrete: width = 176, height = 144 }
Time interval between frame: 1/30,
{ discrete: width = 320, height = 240 }
Time interval between frame: 1/30,
{ discrete: width = 352, height = 288 }
Time interval between frame: 1/30,
{ discrete: width = 640, height = 360 }
Time interval between frame: 1/30,
{ discrete: width = 1280, height = 720 }
Time interval between frame: 1/30,
checking muxed H264 format support
device doesn't seem to support uvc H264 (0)
checking format: MJPG
VIDIOC_G_COMP:: Inappropriate ioctl for device
fps is set to 1/30
drawing controls

Segmentation fault (core dumped)

[bzb.dev001]

Found more info about this. This could be a fix for me. Haven't tried
it yet.
https://launchpad.net/~pj-assis/+archive/ubuntu/ppa

[Paulo Assis]

Hi,
yes please try the latest version: 2.0.1 or even the development
version from the testing ppa (it is packaged in the same way as in
debian, so it will be more compatible with future ubuntu versions):
https://launchpad.net/~pj-assis/+archive/ubuntu/testing

If you still have any issues please report back.

Regards,
Paulo

Post by bzb.dev001
Found more info about this. This could be a fix for me. Haven't tried
it yet.
https://launchpad.net/~pj-assis/+archive/ubuntu/ppa
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