Since upgrade to 3.27 (including bios to 2.20) on RB411 some clients have problem with the ethernet connection. I have to set Auto Negotiation disabled, otherwise there is sometimes no connection (R) between RB LAN interface and the ethernet card .

For the Czechs I must say we will not use RB411R. I would buy it only if the prise is $30 otherwise cheap and stable AP's are adequate. IMO 75-80% of the market prefer 5 GHz band. Today my prices by local dealer are [--] for RB411 and [--] for R52. That's [--]. If you make integrated 5 GHz card chea...

It happened me too when i upgraded the BIOS. Just set the cpu-frequency (run telnet or terminal) and it will work correctly again.

system routerboard settings set cpu-frequency=680MHz

RB333, RC6, Atheros 5213, 5GHz-Turbo, N-Streme On, Polling On, Exact size 3200, 54 Mb, Signal -63/-62, StN 33, CCQ 100/100, Firewall Off, Conn Tracking Off: rx-current: 74.3Mbps rx-10-second-average: 74.0Mbps rx-total-average: 56.6Mbps lost-packets: 655 random-data: no direction: receive rx-size: 1500

I have this problem with CPU load too. It appeared after upgrade from RC13 to 3.0. It helped to disable Filter rules (just 7 simply rules to filter TCP/UDP ports). Now I have upgraded too 3.1. Will be watching, if it helps.

Tried RC5-RC7 on Intel 945GM and AMD 690G chipset. Both doesn't work. Complete CF format (not netinstall) helps but you lost the license.

After BIOS update try to Enable/Disable just this option - ACPI APIC support.

I just upgraded from RC4 to RC5 on my server (Intel Core Solo, Intel 945GM chipset).

This error appears during boot:

Loading system with initrd
Uncompressing Linux... Ok, booting the kernel.
ERROR: could not find disk!
Please attach it somewhere else.

Upgrade your BIOS (maybe it is not necessary) and disable (or enable? i am not sure now ) option Power, ACPI APIC support. It will work.

The same problem appears with two RB333 with Atheros (CM9) - WDS mode.

AP cards: CM9
clients: Realtek 8186 (OvisLink WL5460AP)

Clients randomly lost communication with AP. I need to disable and enable wlan card.
Probably clients switch to sleep mode.