My network card is a Broadcom 4401. Please find the output of $lspci and $lsmod hereafter.
When the system starts up, the network is unavailable. Instead of using systemsettings, i manually set the route and the interface: $route add default gw 192.168.1.1 $ifconfig eth0 192.168.1.2 The network is now working. And, it is still working after the reboot (which was not the case when I used systemsettings)! I will redo a fresh install of Flight5 in order to make sure that this is reproducible on my computer. [EMAIL PROTECTED]:~$ sudo lspci 0000:00:00.0 Host bridge: ATI Technologies Inc Radeon 9100 IGP Host Bridge (rev 02) 0000:00:01.0 PCI bridge: ATI Technologies Inc Radeon 9100 IGP AGP Bridge 0000:00:13.0 USB Controller: ATI Technologies Inc OHCI USB Controller #1 (rev 01) 0000:00:13.1 USB Controller: ATI Technologies Inc OHCI USB Controller #2 (rev 01) 0000:00:13.2 USB Controller: ATI Technologies Inc EHCI USB Controller (rev 01) 0000:00:14.0 SMBus: ATI Technologies Inc ATI SMBus (rev 17) 0000:00:14.1 IDE interface: ATI Technologies Inc ATI Dual Channel Bus Master PCI IDE Controller 0000:00:14.3 ISA bridge: ATI Technologies Inc: Unknown device 434c 0000:00:14.4 PCI bridge: ATI Technologies Inc: Unknown device 4342 0000:00:14.5 Multimedia audio controller: ATI Technologies Inc IXP150 AC'97 Audio Controller 0000:01:05.0 VGA compatible controller: ATI Technologies Inc R350 AH [Radeon 9800] 0000:01:05.1 Display controller: ATI Technologies Inc Radeon R350 [Radeon 9800] (Secondary) 0000:02:05.0 RAID bus controller: Silicon Image, Inc. SiI 3512 [SATALink/SATARaid] Serial ATA Controller (rev 01) 0000:02:06.0 Ethernet controller: Broadcom Corporation BCM4401 100Base-T (rev 01) 0000:02:0b.0 FireWire (IEEE 1394): VIA Technologies, Inc. IEEE 1394 Host Controller (rev 80) [EMAIL PROTECTED]:~$ sudo lsmod Module Size Used by ipv6 265600 6 radeon 108832 0 drm 72852 1 radeon rfcomm 40216 0 l2cap 26244 5 rfcomm bluetooth 49892 4 rfcomm,l2cap speedstep_lib 4484 0 cpufreq_userspace 4696 0 cpufreq_stats 5636 0 freq_table 4740 1 cpufreq_stats cpufreq_powersave 1920 0 cpufreq_ondemand 6428 0 cpufreq_conservative 7332 0 video 16260 0 tc1100_wmi 6916 0 sony_acpi 5516 0 pcc_acpi 11136 0 hotkey 11556 0 dev_acpi 11140 0 container 4608 0 button 6672 0 acpi_sbs 19980 0 battery 9988 1 acpi_sbs ac 5252 1 acpi_sbs i2c_acpi_ec 5120 1 acpi_sbs i2c_core 21904 1 i2c_acpi_ec sg 37920 0 sd_mod 19984 0 nls_iso8859_1 4224 1 vfat 13440 1 fat 53020 1 vfat nls_cp437 5888 2 ntfs 103536 1 dm_mod 58936 1 af_packet 22920 2 md_mod 72532 0 sr_mod 16932 0 sbp2 24196 0 parport_pc 35780 1 lp 11844 0 parport 36296 2 parport_pc,lp snd_atiixp 19724 1 snd_ac97_codec 92704 1 snd_atiixp snd_ac97_bus 2304 1 snd_ac97_codec snd_pcm_oss 53664 0 snd_mixer_oss 18688 1 snd_pcm_oss snd_pcm 89736 3 snd_atiixp,snd_ac97_codec,snd_pcm_oss snd_timer 25220 1 snd_pcm snd 55268 8 snd_atiixp,snd_ac97_codec,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer soundcore 10208 1 snd ati_agp 9100 1 usb_storage 74176 0 snd_page_alloc 10632 2 snd_atiixp,snd_pcm agpgart 34888 2 drm,ati_agp tsdev 8000 0 usbhid 38368 0 psmouse 36100 0 serio_raw 7300 0 ohci1394 35124 0 ieee1394 299832 2 sbp2,ohci1394 b44 25740 0 shpchp 45632 0 pci_hotplug 29236 1 shpchp mii 5888 1 b44 evdev 9856 1 ext3 135688 1 jbd 58772 1 ext3 ide_generic 1536 0 ehci_hcd 32008 0 ohci_hcd 21892 0 usbcore 129668 5 usb_storage,usbhid,ehci_hcd,ohci_hcd sata_sil 9348 0 libata 61704 1 sata_sil scsi_mod 138984 6 sg,sd_mod,sr_mod,sbp2,usb_storage,libata ide_cd 33028 0 cdrom 38560 2 sr_mod,ide_cd ide_disk 17664 5 generic 5124 0 atiixp 6800 1 thermal 13576 0 processor 23360 1 thermal fan 4868 0 capability 5000 0 commoncap 7296 1 capability vga16fb 13448 1 vgastate 10368 1 vga16fb fbcon 42784 72 tileblit 2816 1 fbcon font 8320 1 fbcon bitblit 6272 1 fbcon softcursor 2304 1 bitblit -- Network unavailable on boot https://launchpad.net/malone/bugs/37210 -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs