On the following kernel+linuxwireless versions: - Ubuntu 10.04+latest wireless backports - 2.6.36-rc4+compat-wireless-2.6.36-rc3-1 My wifi connection drops every few minutes and freezes the desktop for 20 seconds. It then recovers and the following is listed in dmesg: [ 3257.370882] iwlagn 0000:03:00.0: MAC is in deep sleep!. CSR_GP_CNTRL = 0x080003D8 [ 3257.410187] iwlagn 0000:03:00.0: MAC is in deep sleep!. CSR_GP_CNTRL = 0x080003D8 [ 3257.460991] iwlagn 0000:03:00.0: MAC is in deep sleep!. CSR_GP_CNTRL = 0x080003D8 [ 3257.501898] iwlagn 0000:03:00.0: Master Disable Timed Out, 100 usec The deep sleep msg is repeated numerous times. ThinkPad T400: $ lspci -vv -s 03:00.0 03:00.0 Network controller: Intel Corporation Wireless WiFi Link 5300 Subsystem: Intel Corporation Device 1011 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0, Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ 31 Region 0: Memory at f4300000 (64-bit, non-prefetchable) [size=8K] Capabilities: <access denied> Kernel driver in use: iwlagn Kernel modules: iwlagn $ sudo dmidecode | grep -i bios BIOS Revision: 3.18 -- Darren Hart -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html