Ubuntu
linux package

  1. Bug #1524930
  2. Comment #0

Comment 0 for bug 1524930

Revision history for this message
Colin Ian King (colin-king) wrote :

[SRU Justification][Vivid]

Users of Ubuntu wily are seeing a seemingly alarming kernel failure message "ACPI PCC probe failed" when in fact it is just a debug message informing the kernel developers that a probe for an ACPI PCC mailbox was not successful (which is just a debug only message) and not a failure one needs to worry about. This message is asked about frequently on askubuntu.com, so it is alarming quite a few users, c.f. : http://askubuntu.com/questions/708215/1-037533-acpi-pcc-probe-failed.

This fix landed in Wily, and the driver with the alarming message only affects Vivid.

[Fix]
Upstream commit efd756daf4ddae3cec2404c4e0b680b7cfdd6a45 ("ACPI / PCC: Use pr_debug() for debug messages in pcc_init()")

[Testcase]

Boot a machine without the PCC feature, without the fix one sees the error message in the kernel log. With the fix, this error is now a warning. Note: This only affects Vivid.