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---
upgrade:
- |
The defaults for ``kernel_append_params`` have had the Linux kernel
command line parameter ``nomodeset`` removed from the defaults for the
``kernel_append_params`` settings. The ``nomodeset`` option is for
troubleshooting and changes the behavior of the graphics interface
such that memory can be locked upon graphical updates on physical
servers with BMC graphical interfaces, which results in spikes in
latency and packet loss whenever graphics updates occur. Operators
may add the option to their local configuration, but should be aware
that large image transfers or other high IO operations can be impacted.
fixes:
- |
Agents deploying on physical servers with default kernel arguments were
suspetible to packet loss if a Matrox VGA/Aspeed BMC Graphics interface
is present on the machine. The defaults have been changed to remove
the use of the ``nomodeset`` kernel command line parameter which
should only be used for troubleshooting as it has been determined
that the memory updates can lock all of the kernel memory upon any
console graphics update which can negatively impact IO for Networking
or Disk interactions.
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