I just upgraded to Gutsy, and my network connection now times out regularly, at irregular intervals. I can bring it up again using: $ sudo ifdown ra0 $ sudo ifup ra0 But it is guaranteed to fail again shortly. Very annoying. I have an rt2500 chipset. Output of lspci, lsmod, and dmesg below. $ lspci (full output) 00:00.0 Host bridge: Silicon Integrated Systems [SiS] 760/M760 Host (rev 03) 00:01.0 PCI bridge: Silicon Integrated Systems [SiS] SG86C202 00:02.0 ISA bridge: Silicon Integrated Systems [SiS] SiS964 [MuTIOL Media IO] (rev 36) 00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE] (rev 01) 00:02.7 Multimedia audio controller: Silicon Integrated Systems [SiS] AC'97 Sound Controller (rev a0) 00:03.0 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 Controller (rev 0f) 00:03.1 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 Controller (rev 0f) 00:03.2 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 Controller (rev 0f) 00:03.3 USB Controller: Silicon Integrated Systems [SiS] USB 2.0 Controller 00:05.0 IDE interface: Silicon Integrated Systems [SiS] RAID bus controller 180 SATA/PATA [SiS] (rev 01) 00:09.0 Network controller: RaLink RT2500 802.11g Cardbus/mini-PCI (rev 01) 00:0d.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10) 00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration 00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map 00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller 00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control 01:00.0 VGA compatible controller: nVidia Corporation NV25 [GeForce4 Ti 4200] (rev a3) $ lsmod | grep rt2 (full output, without the pipe, attached) rt2500pci 19072 0 rt2x00pci 11520 1 rt2500pci rt2x00lib 19584 2 rt2500pci,rt2x00pci rfkill 8208 1 rt2x00lib mac80211 171016 4 rc80211_simple,rt2500pci,rt2x00pci,rt2x00lib input_polldev 5896 1 rt2x00lib crc_itu_t 3072 1 rt2x00lib eeprom_93cx6 3200 1 rt2500pci $ dmesg (just a snippet, full output attached) [74082.964000] ra0: authenticated [74082.964000] ra0: associate with AP 00:13:46:1e:82:22 [74083.164000] ra0: associate with AP 00:13:46:1e:82:22 [74083.164000] ra0: RX AssocResp from 00:13:46:1e:82:22 (capab=0x31 status=0 aid=46) [74083.164000] ra0: associated [74083.164000] ADDRCONF(NETDEV_CHANGE): ra0: link becomes ready [74083.168000] ra0: RX disassociation from 00:13:46:1e:82:22 (reason=1) [74083.168000] ra0: disassociated [74083.176000] ra0: RX deauthentication from 00:13:46:1e:82:22 (reason=7) [74083.176000] ra0: deauthenticated [74083.292000] ra0: RX deauthentication from 00:13:46:1e:82:22 (reason=7) [74084.292000] ra0: authenticate with AP 00:13:46:1e:82:22 [74084.292000] ra0: RX authentication from 00:13:46:1e:82:22 (alg=0 transaction=2 status=0) [74084.292000] ra0: authenticated [74084.292000] ra0: associate with AP 00:13:46:1e:82:22 [74084.300000] ra0: RX ReassocResp from 00:13:46:1e:82:22 (capab=0x31 status=0 aid=46) [74084.300000] ra0: associated [74093.284000] ra0: no IPv6 routers present [75128.300000] ra0: No ProbeResp from current AP 00:13:46:1e:82:22 - assume out of range [75160.300000] ra0: No STA entry for own AP 00:13:46:1e:82:22 [75192.300000] ra0: No STA entry for own AP 00:13:46:1e:82:22 [75224.300000] ra0: No STA entry for own AP 00:13:46:1e:82:22 [75256.300000] ra0: No STA entry for own AP 00:13:46:1e:82:22 [75265.764000] ADDRCONF(NETDEV_UP): ra0: link is not ready [75266.520000] ra0: Initial auth_alg=0 [75266.520000] ra0: authenticate with AP 00:13:46:1e:82:22 [75266.528000] ra0: RX authentication from 00:13:46:1e:82:22 (alg=0 transaction=2 status=0) [75266.528000] ra0: authenticated [75266.528000] ra0: associate with AP 00:13:46:1e:82:22 [75266.544000] ra0: RX AssocResp from 00:13:46:1e:82:22 (capab=0x31 status=0 aid=46) [75266.544000] ra0: associated [75266.544000] ADDRCONF(NETDEV_CHANGE): ra0: link becomes ready [75267.788000] ra0: duplicate address detected! [75267.788000] ra0: duplicate address detected! [76174.544000] ra0: No ProbeResp from current AP 00:13:46:1e:82:22 - assume out of range [76206.544000] ra0: No STA entry for own AP 00:13:46:1e:82:22 [76238.544000] ra0: No STA entry for own AP 00:13:46:1e:82:22 [76270.544000] ra0: No STA entry for own AP 00:13:46:1e:82:22 [76302.544000] ra0: No STA entry for own AP 00:13:46:1e:82:22 [76334.544000] ra0: No STA entry for own AP 00:13:46:1e:82:22 [76366.544000] ra0: No STA entry for own AP 00:13:46:1e:82:22 [76398.544000] ra0: No STA entry for own AP 00:13:46:1e:82:22 [76430.544000] ra0: No STA entry for own AP 00:13:46:1e:82:22 [76462.544000] ra0: No STA entry for own AP 00:13:46:1e:82:22 [76494.544000] ra0: No STA entry for own AP 00:13:46:1e:82:22 [76526.544000] ra0: No STA entry for own AP 00:13:46:1e:82:22 [76558.544000] ra0: No STA entry for own AP 00:13:46:1e:82:22 [76590.544000] ra0: No STA entry for own AP 00:13:46:1e:82:22 [76622.544000] ra0: No STA entry for own AP 00:13:46:1e:82:22 [76654.544000] ra0: No STA entry for own AP 00:13:46:1e:82:22 [76686.544000] ra0: No STA entry for own AP 00:13:46:1e:82:22 [76718.544000] ra0: No STA entry for own AP 00:13:46:1e:82:22 [76750.544000] ra0: No STA entry for own AP 00:13:46:1e:82:22 [76753.208000] ra0: RX deauthentication from 00:13:46:1e:82:22 (reason=2) [76753.208000] ra0: deauthenticated [76754.208000] ra0: authenticate with AP 00:13:46:1e:82:22 [76754.228000] ra0: RX authentication from 00:13:46:1e:82:22 (alg=0 transaction=2 status=0) [76754.228000] ra0: authenticated [76754.228000] ra0: associate with AP 00:13:46:1e:82:22 [76754.340000] ra0: RX ReassocResp from 00:13:46:1e:82:22 (capab=0x31 status=0 aid=46) [76754.340000] ra0: associated