Time drift on a SLES or OES Guest running on Hyper-V

This document (7008125) is provided subject to the disclaimer at the end of this document.


Microsoft Windows 2008 Hyper-V Host
SUSE Linux Enterprise Server 10 Service Pack 3 Guest
SUSE Linux Enterprise Server 11 Service Pack 1 Guest
Novell Open Enterprise Server 2 (OES 2) Linux Support Pack 2 Guest
Novell Open Enterprise Server 2 (OES 2) Linux Support Pack 3 Guest


OES 2 Guest is experiencing time drift
SLES 10 SP3 Guest is experiencing time drift
SLES 11 SP1 Guest is experiencing time drift


For an OES2 / SLES 10 Guest:
Update the kernel to AT LEAST SLES 10 SP3 version
NOTE:  For an OES Guest always apply ALL current SLES and OES updates to avoid kernel - OES module mismatches.

For a SLES 11 SP1 Guest:
Update the kernel (and corresponding hyper-v-kmp package) to AT LEAST version

Additional Information

Prior to SLES 11 SP1 kernel version and the corresponding hyper-v-kmp package, the hv_timesource LIS module was not always loading.

To verify what hv_ modules are loading run the following command as root user:

lsmod | grep hv

The following modules should be loaded:
hv_utils                3185  0
hv_timesource           1311  0 [permanent]
hv_storvsc             19663  0
hv_netvsc              30622  0
hv_blkvsc              26542  3
hv_vmbus               50934  4 hv_utils,hv_storvsc,hv_netvsc,hv_blkvsc
scsi_mod              184102  3 hv_storvsc,hv_blkvsc,libata


This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

  • Document ID:7008125
  • Creation Date: 14-Mar-2011
  • Modified Date:04-Oct-2022
    • SUSE Linux Enterprise Server

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