Same problem here using beta release for Kubuntu 6.10 (codenamed Edgy Eft) 64 bit edition on a Dell Inspiron 9400:
Screen UltraSharp Wide Screen WUXGA (1920 x 1200) Display with TrueLife Motherboard Dell 0YD479 Chipset Intel i945PM Rev03 SouthBridge Intel 82801GHM (ICH7-M DH) Processor Core 2 Duo T7200 Merom MMX, SSE, SSE2, SSE3, SSE4, EM64T RAM 2x1024MB Hyunday DDRII @ 667 MHz Graphic Card NVIDIA GeForce Go 7900 GS Sound Card SIGMATEL STAC 92XX C-Major HD Audio Network Adapter Broadcom 440x 10/100 Integrated Controller WiFi Card Intel(R) PRO/Wireless 3945ABG Network Connection Modem Conexant D110,HDA,MDC,v.92,modem Bluetooth Card Dell Wireless 355 Module with Bluetooth 2.0 + EDR Technology Hard Disk 120 Gb Hitachi HTS541612J9SA00 IDE SATA SMART Acoustic Management DVD PHILIPS DVD+-RW SDVD8820 IDE ATA Card Reader + Firewire Ricoh R5C832 TouchPad Desconocido - Synaptics Logitech MX510 connected via USB --> Working OK -- Random keyboard failure in X https://launchpad.net/bugs/58884 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs