#18953: mjpg-streamer won't work with many webcam.
------------------------+--------------------------------
Reporter: anonymous | Owner: developers
Type: defect | Status: new
Priority: normal | Milestone: Chaos Calmer 15.05
Component: packages | Version: Trunk
Resolution: | Keywords:
------------------------+--------------------------------
Comment (by anonymous):
{{{
uvcdynctrl -f -d /dev/video0
Listing available frame formats for device /dev/video0:
Pixel format: YUYV (YUV 4:2:2 (YUYV); MIME type: video/x-raw-yuv)
Frame size: 640x480
Frame rates: 30
Frame size: 160x120
Frame rates: 30
Frame size: 176x144
Frame rates: 30
Frame size: 320x240
Frame rates: 30
Frame size: 352x288
Frame rates: 30
Frame size: 1280x1024
Frame rates: 15
}}}
{{{
[19515.884000] uvcvideo: Failed to query (GET_DEF) UVC control 2 on unit
3: -32 (exp. 2).
[19515.896000] uvcvideo: Failed to query (GET_DEF) UVC control 2 on unit
3: -32 (exp. 2).
[19515.904000] uvcvideo: Failed to query (GET_DEF) UVC control 3 on unit
3: -32 (exp. 2).
[19515.916000] uvcvideo: Failed to query (GET_DEF) UVC control 7 on unit
3: -32 (exp. 2).
[19515.924000] uvcvideo: Failed to query (GET_DEF) UVC control 6 on unit
3: -32 (exp. 2).
[19515.932000] uvcvideo: Failed to query (GET_DEF) UVC control 9 on unit
3: -32 (exp. 2).
[19515.940000] uvcvideo: Failed to query (GET_DEF) UVC control 4 on unit
3: -32 (exp. 2).
[19515.952000] uvcvideo: Failed to query (GET_DEF) UVC control 5 on unit
3: -32 (exp. 1).
[19515.960000] uvcvideo: Failed to query (GET_DEF) UVC control 10 on unit
3: -32 (exp. 2).
[19515.968000] uvcvideo: Failed to query (GET_DEF) UVC control 8 on unit
3: -32 (exp. 2).
[19515.980000] uvcvideo: Failed to query (GET_DEF) UVC control 1 on unit
3: -32 (exp. 2).
[19516.008000] IFXUSB: ISOC transfer not supported!!!
[19516.012000] uvcvideo: Failed to submit URB 0 (-19).
[19516.920000] ------------[ cut here ]------------
[19516.924000] WARNING: CPU: 0 PID: 1895 at
drivers/media/v4l2-core/videobuf2-core.c:2135 vb2_queue_init+0x548/0xe34
[videobuf2_core]()
[19516.936000] Modules linked in: ath9k ath9k_common iptable_nat ath9k_hw
ath pppoe nf_nat_ipv4 nf_conntrack_ipv6 nf_conntrack_ipv4 mac80211
ipt_REJECT ipt_MASQUERADE cfg80211 xt_time xt_tcpudp xt_state xt_nat
xt_multiport xt_mark xt_mac xt_limit xt_id xt_conntrack xt_comment
xt_TCPMSS xt_REDIRECT xt_LOG xt_CT uvcvideo pppox ppp_async nf_reject_ipv4
nf_nat_masquerade_ipv4 nf_nat_ftp nf_nat nf_log_ipv4 nf_defrag_ipv6
nf_defrag_ipv4 nf_conntrack_rtcache nf_conntrack_ftp nf_conntrack
ltq_deu_ar9 ltq_atm_ar9 iptable_raw iptable_mangle iptable_filter
ip_tables crc_ccitt compat videobuf2_vmalloc videobuf2_memops
videobuf2_core v4l2_common videodev drv_dsl_cpe_api i2c_dev i2c_core
ltq_mei_ar9 ledtrig_usbdev ip6t_REJECT nf_reject_ipv6 nf_log_ipv6
nf_log_common ip6table_raw ip6table_mangle ip6table_filter ip6_tables
x_tables ehci_platform ehci_hcd pppoatm ppp_generic slhc br2684 atm ipv6
dma_shared_buffer arc4 crypto_blkcipher ltq_hcd_ar9 gpio_button_hotplug
aead
[19517.020000] CPU: 0 PID: 1895 Comm: mjpg_streamer Tainted: G W
3.18.23 #1
[19517.028000] Stack : 00000000 00000000 00000000 00000000 804745f2
00000048 00000000 00000000
[19517.028000] 83204868 833d5b00 803aafe0 80426c03 00000767 8047382c
83204868 833d5b00
[19517.028000] 83b55c00 770d7358 82d86de0 8005546c 00000003 8002d848
00000857 00000000
[19517.028000] 803af570 82717c14 00000000 00000000 00000000 00000000
00000000 00000000
[19517.028000] 00000000 00000000 00000000 00000000 00000000 00000000
00000000 00000000
[19517.028000] ...
[19517.064000] Call Trace:
[19517.064000] [<80019fd0>] show_stack+0x50/0x84
[19517.072000] [<8002d9c8>] warn_slowpath_common+0x84/0xb4
[19517.076000] [<8002da80>] warn_slowpath_null+0x18/0x24
[19517.080000] [<831419ac>] vb2_queue_init+0x548/0xe34 [videobuf2_core]
[19517.088000]
[19517.088000] ---[ end trace 50717ea3f7ec9747 ]---
}}}
--
Ticket URL: <https://dev.openwrt.org/ticket/18953#comment:8>
OpenWrt <http://openwrt.org>
Opensource Wireless Router Technology
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