Debian Jessie on TS-209 II Pro - no network problem

[tpsamw1 <tpsamw1@o2.pl>]

Hello,

Yesterday I've upgraded Debian from stable release to testing (Jessie). It was fine for some time, today I've reinstalled qcontrol - I don't know why, but with reinstalling qcontrol installer started to flash kernel image (maybe it wasn't flashed for first time?). After booting device network is down - front led is off.

I've mounted disk on other device and copied some logs, in kern.log I see:

Apr 27 14:30:34 qnap kernel: [    0.000000] Linux version 3.13-1-orion5x (debian-kernel@lists.debian.org) (gcc version 4.8.2 (Debian 4.8.2-19) ) #1 Debian 3.13.10-1 (2014-04-15)

Apr 27 14:30:34 qnap kernel: [   29.282933] libphy: PHY orion-mdio-mii:08 not found
Apr 27 14:30:34 qnap kernel: [   29.314674] platform mv643xx_eth_port.0: Driver mv643xx_eth_port requests probe deferral

Apr 27 14:30:34 qnap kernel: [   30.238754] libphy: PHY orion-mdio-mii:08 not found
Apr 27 14:30:34 qnap kernel: [   30.271171] platform mv643xx_eth_port.0: Driver mv643xx_eth_port requests probe deferral
Apr 27 14:30:34 qnap kernel: [   30.477932] mv643xx_eth_port mv643xx_eth_port.0 eth0: port 0 with MAC address 00:08:9b:8c:3b:9c

Apr 27 14:30:34 qnap kernel: [   50.456008] mv643xx_eth_port mv643xx_eth_port.0 eth0: link up, 1000 Mb/s, full duplex, flow control disabled
Apr 27 14:30:34 qnap kernel: [   50.466158] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready

Although is says "eth0: link becomes ready" there is still no network. On back only green led from eth port is blinking. One more thing, "link up" message is rather random, some times it is shown in logs, sometimes not. Front network led is blinking only for several seconds after powering on.

What steps can be done to get it back to work?

Thank you, best regards!

Marek