Serial console synchronization problem and/or hanging (re)boot on full-virtual VMs
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SUSE Linux Enterprise Server 10 Service Pack 2
SUSE Linux Enterprise Server 10 Service Pack 3
Another - more common - problem is that the input and output on the serial console gets out of synchronization, so that the last input character (or output line/character) does not get displayed until some key gets pressed.
An example of this would be that if the characters "Hello" gets typed, then the console will only display "Hell" until another key is pressed.
Furthermore the problem only seems to exhibit when multiple VCPUs are allocated to the VM. The more VCPUs, the easier to trigger the problem. It has not been possible to reproduce on uniprocessor VMs.
It does not matter if the VM host is running SLES 10 SP2, SLES 10 SP3 or SLES 11. Both SLES 10 and SLES 11 VMs experience the problem.
The patch is included in the following kernels for the respective products :
SLES 10 SP2 : 126.96.36.199-0.42.8
SLES 10 SP3 : 188.8.131.52-0.59.1
SLES 11 : 184.108.40.206-0.1.1
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- Document ID:7003721
- Creation Date: 01-Jul-2009
- Modified Date:12-Oct-2022
- SUSE Linux Enterprise Server
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