damn that sucks, 
guess we need to wait until a new revision of the board to come out.. or a newer version of rOS ,
kinda doubt those packages are using the flash…
anyway how do i read/open the supout.tif file ?
is there a reader that i can use ?
The ‘ntp’ package has this uncanny ability to restart Routerboards without warning. Those 3 packages I mentioned are usually not included in a standard RouterOS installation either.
have you made that support output file while you are using RouterOS v5.13 and the cpu usage is close to 100%?
Send that file to support@mikrotik.com
done.. sent the supout.rif files to support already…
Ticket#2012022166000052
please note that im using 5.12 didnt upgrade to 5.13 yet..
if you need the supout.rif files to be 5.13 please do inform me ill find time to upgrade and configure and test it out
Interesting. But I don’t use the NTP package and still had problems.
How about the other two, if you have it? What is your /system package print output? I use Skype too with exactly the same routerboard and has no problem.
I don’t use either of the other packages. Do you use Skype over wireless? And do you use any Apple hardware? Would you mind posting your wireless and bridge config to see if I did anything “wrong”?
hey just
just an update from support..
i’ve been told to
“I’ve asked to uninstall User Manager package. Disable all rules at /system logging , and /system script, if CPU load is still high.”
won’t be free to test this out, will test it out later and update you guys
Thanks. Please do keep us updated.
Yes I use Skype over wireless. My household is Apple-free though, we don’t have those things here. Only Skype on Windows Vista.
[ranpha@RB751U-2HnD] > /interface wireless print
Flags: X - disabled, R - running
0 R name="wlan1" mtu=1500 mac-address=00:0C:42:E2:10:04 arp=enabled interface-type=Atheros 11N mode=ap-bridge
ssid=<redacted> frequency=2437 band=2ghz-b/g/n channel-width=20/40mhz-ht-above scan-list=default
wireless-protocol=any antenna-mode=txa-rxb wds-mode=disabled wds-default-bridge=none wds-ignore-ssid=no
bridge-mode=enabled default-authentication=yes default-forwarding=yes default-ap-tx-limit=0
default-client-tx-limit=0 hide-ssid=no security-profile=<redacted> compression=no
[ranpha@RB751U-2HnD] > /interface bridge print
Flags: X - disabled, R - running
0 R name="bridge-local" mtu=1500 l2mtu=2290 arp=proxy-arp mac-address=00:0C:42:E2:10:00 protocol-mode=rstp
priority=0x8000 auto-mac=no admin-mac=00:0C:42:E2:10:00 max-message-age=20s forward-delay=15s
transmit-hold-count=6 ageing-time=5m
Thanks. I will check out my setup when I get an opportunity. Here’s hoping its just a simple mis-configuration on my end!
I’ve got some different settings, but haven’t been able to make a Skype call to check. Why do you have antenna-mode=txa-rxb and are you using an external antenna?
I finally got my RB751U-2HnD. 2 units actually. Upgraded both to 5.14. First one I did a bTest on my MacBook Pro. Second unit, I downloaded a bunch of stuff from iTunes on a 5mbps FTTH line. I didn’t experience any dropouts nor 100% CPU usage by the Flash process. All via WiFi, of course. I will try a Skype call tomorrow. There’s no one I can call right now, it’s 5am here. 
Both of my units’ serial number begins with 2FF1xxxxxxxx/145.
One little problem, I couldn’t get my 2010 MacBook Pro to connect to the RB751 at anything higher than 130mbps (MCS 15). The MBP uses a Broadcom chipset for its radio. Maybe that’s why?
Would be interested to hear how the Skype call goes - thats the only way I can replicate the 100% CPU and flash process. Downloading (even multiple legal torrents on a 100mbps fibre connection) works fine.
I think you need a 5ghz card to connect at anything over 130mbps to your Mac.
Any one of you use the Dude maybe? To monitor the router?
I tried various SNMP monitoring software. Became unresponsive as all other interfaces. Didn’t use the Dude as I’m not a Windows user.
2 hours ago, while I was out, the RB751U-2HnD decided to reboot itself. I wonder what happened. At that time I only had one Mac connected to it downloading 3 torrents simultaneously (part of my stress test). I wasn’t home but got notification of it when it emailed me its new IP address.
You’re right, MBP connects at 300mbps to my Airport Extreme at 5Ghz only. It seems Apple decided not to enable 40Mhz width at 2.4GHz. I read that if one boots up Windows using Bootcamp, it will connect just fine at 300mbps at 2.4GHz.
Back in the house now, will try Skype soon.
what error did you get ? upon reboot the first line , is the error code , code 1 ?
the error code same with this dude ? "http://forum.mikrotik.com/t/rb751u-router-was-rebooted-without-proper-shutdown-cause-1/54664/1
seems like quite a number of ppl having weird problems
Yeah, that’s the error I got. The same one that one gets if the router is powered off without issuing a shutdown command. Come to think of it, I didn’t pay attention to the cause number. It’s no longer in the log now. Since then it hasn’t rebooted.