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problem adding more than 8 monitors to pv-155 on zoneminder

So far only /dev/video[0-3] channel [0-1] is working if I add /dev/video[0-3] channel [2-3] I get the errors below.

This is a system working redhat 5.5 since 2010 with 5 monitors but now I want to add 4 more.

I always use the video for linux 1 and it works fine with all other monitors.

when I enter channel 2 and above for video 0-3, I get black screens and also, other monitor that were working get black and show red in zm main screen.

Thanks.

Aug 20 01:51:14 video zmc_dvideo1[886]: ERR [Sync failure for frame 0 buffer 1: Interrupted system call]

Aug 20 01:51:14 video zmc_dvideo1[886]: ERR [Failed to capture image from monitor 6 (1/2)]

Aug 20 01:51:15 video zmdc[863]: ERR ['zmc -d /dev/video1' exited abnormally, exit status 255]

Aug 20 01:51:16 video zmc_dvideo1[1778]: ERR [Failed to set camera source 1: Invalid argument]

Aug 20 01:51:16 video zmc_dvideo1[1778]: ERR [Failed to post-capture monitor 6 (1/3)]

Aug 20 01:51:16 video zmdc[863]: ERR ['zmc -d /dev/video1' exited abnormally, exit status 255]

Aug 20 01:51:18 video zmc_dvideo1[1783]: ERR [Failed to set camera source 1: Invalid argument]

Aug 20 01:51:18 video zmc_dvideo1[1783]: ERR [Failed to post-capture monitor 6 (1/3)]

Aug 20 01:51:18 video zmdc[863]: ERR ['zmc -d /dev/video1' exited abnormally, exit status 255]

Aug 20 01:51:22 video zmwatch[972]: ERR [Can't get shared memory id '7a6d0019', 25: No such file or directory]

Aug 20 01:51:23 video zmc_dvideo1[1793]: ERR [Failed to set camera source 1: Invalid argument]

Aug 20 01:51:23 video zmc_dvideo1[1793]: ERR [Failed to post-capture monitor 6 (1/3)]

Aug 20 01:51:24 video zmdc[863]: ERR ['zmc -d /dev/video1' exited abnormally, exit status 255]

Aug 20 01:51:31 video zmc_dvideo1[1801]: ERR [Failed to set camera source 1: Invalid argument]

Aug 20 01:51:31 video zmc_dvideo1[1801]: ERR [Failed to post-capture monitor 6 (1/3)]

Aug 20 01:51:31 video zmdc[863]: ERR ['zmc -d /dev/video1' exited abnormally, exit status 255]

Aug 20 01:56:19 video zmc_dvideo4[2043]: ERR [No monitors found]

*****

lspci

02:09.1 Multimedia controller: Brooktree Corporation Bt878 Audio Capture (rev 11)

Subsystem: Unknown device aa01:1461

Flags: bus master, medium devsel, latency 64, IRQ 3

Memory at f8004000 (32-bit, prefetchable) [size=4K]

Capabilities: [44] Vital Product Data

Capabilities: [4c] Power Management version 2

02:0a.0 Multimedia video controller: Brooktree Corporation Bt878 Video Capture (rev 11)

Subsystem: Unknown device aa02:1462

Flags: bus master, medium devsel, latency 64, IRQ 169

Memory at f8003000 (32-bit, prefetchable) [size=4K]

Capabilities: [44] Vital Product Data

Capabilities: [4c] Power Management version 2

02:0a.1 Multimedia controller: Brooktree Corporation Bt878 Audio Capture (rev 11)

Subsystem: Unknown device aa02:1462

Flags: bus master, medium devsel, latency 64, IRQ 9

Memory at f8002000 (32-bit, prefetchable) [size=4K]

Capabilities: [44] Vital Product Data

Capabilities: [4c] Power Management version 2

02:0b.0 Multimedia video controller: Brooktree Corporation Bt878 Video Capture (rev 11)

Subsystem: Unknown device aa03:1463

Flags: bus master, medium devsel, latency 64, IRQ 193

Memory at f8001000 (32-bit, prefetchable) [size=4K]

Capabilities: [44] Vital Product Data

Capabilities: [4c] Power Management version 2

02:0b.1 Multimedia controller: Brooktree Corporation Bt878 Audio Capture (rev 11)

Subsystem: Unknown device aa03:1463

Flags: bus master, medium devsel, latency 64, IRQ 10

Memory at f8000000 (32-bit, prefetchable) [size=4K]

Capabilities: [44] Vital Product Data

Capabilities: [4c] Power Management version 2

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