Had the same and other issues (purple screens) with previous versions of ESXi 5.1.0. Upgraded to latest version on 16-03-2013.
I do not configuring any specific settings for drivers.
I've tried severals KBs but nothing seems to work (only a reboot). I have already opened a support ticket with VMware.
~ # /etc/init.d/hostd start
hostd is running.
~ # /etc/init.d/vpxa status
vpxa is running
~ # tail -f var/log/hostd.log
2013-04-09T20:12:44.028Z [4C9A4B90 warning 'UserDirectory'] Group lookup failed for 'MANAGEMENT\ESX Admins'
2013-04-09T20:12:46.791Z [4C6EAB90 verbose 'Cimsvc'] Ticket issued for CIMOM version 1.0, user root
DJGetComputerDN: 0x80047: 0x995 - Unknown error
Stack Trace:
DJGetComputerDN: 0x80047: 0x251E - Unknown error
Stack Trace:
2013-04-09T20:13:00.099Z [4C68BB90 warning 'vim.PerformanceManager'] Basil read workload parameters for d4330b54-7587ac4a are out of range,oIO = 294178 ioSizeBytes = 4114
2013-04-09T20:13:00.099Z [4C68BB90 warning 'vim.PerformanceManager'] Basil write workload parameters for d4330b54-7587ac4a are out of range,oIO = 26770 ioSizeBytes = 157
2013-04-09T20:13:11.047Z [4C7CCB90 verbose 'DvsManager'] PersistAllDvsInfo called
~ # tail -f var/log/vpxa.log
2013-04-08T11:35:18.010Z [7B45EB90 warning 'Default'] Closing Response processing in unexpected state: 3
2013-04-08T11:35:18.024Z [7B45EB90 verbose 'commonvpxXml'] [VpxXml] Error fetching /definitions/import/@namespace from /sdk/vimService?wsdl: 503 (Service Unavailable)
2013-04-08T11:35:18.024Z [7B45EB90 warning 'Default'] Closing Response processing in unexpected state: 3
2013-04-08T11:35:18.024Z [7B45EB90 warning 'hostdcnx'] [VpxaHalCnxHostagent] Could not resolve version for authenticating to host agent
2013-04-08T11:35:38.024Z [FFD8BB90 verbose 'hostdcnx'] [VpxaHalCnxHostagent] Creating temporary connect spec: localhost:443
2013-04-08T11:35:38.039Z [FFD8BB90 verbose 'commonvpxXml'] [VpxXml] Error fetching /sdk/vimServiceVersions.xml: 503 (Service Unavailable)
2013-04-08T11:35:38.039Z [FFD8BB90 warning 'Default'] Closing Response processing in unexpected state: 3
2013-04-08T11:35:38.054Z [FFD8BB90 verbose 'commonvpxXml'] [VpxXml] Error fetching /definitions/import/@namespace from /sdk/vimService?wsdl: 503 (Service Unavailable)
2013-04-08T11:35:38.054Z [FFD8BB90 warning 'Default'] Closing Response processing in unexpected state: 3
2013-04-08T11:35:38.054Z [FFD8BB90 warning 'hostdcnx'] [VpxaHalCnxHostagent] Could not resolve version for authenticating to host agent