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Message #89667
[Bug 1382244] Re: HP ProLiant m400 nic fails to initialize when booted w/ debug
Reproduced the bug with the current updates kernel, updated to the
proposed kernel and the bug was no longer reproducible.
** Tags removed: verification-needed-trusty
** Tags added: verification-done-trusty
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https://bugs.launchpad.net/bugs/1382244
Title:
HP ProLiant m400 nic fails to initialize when booted w/ debug
Status in “linux” package in Ubuntu:
Fix Committed
Status in “linux” source package in Trusty:
Fix Committed
Status in “linux” source package in Utopic:
Fix Committed
Bug description:
[Impact]
On the majority of boots, the mlx4 driver will fail to initialize, resulting in no network connectivity. This only occurs if debug level
logging to the serial console is enabled - which is not the default in Ubuntu.
[Test Case]
Enable debug logging:
$ echo 'setenv bootargs "$bootargs debug"' > /etc/flash-kernel/ubootenv.d/debug
$ sudo flash-kernel
And reboot.
[Regression Risk]
The MSI code being modified in question is only used on X-Gene systems, so risk to other systems is insignificant. In addition, the code being removed are just debug statements that aren't emitted by default today in Ubuntu, so even for X-Gene systems it is a minimal risk.
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References