kernel-packages team mailing list archive
Mailing list archive
[Bug 1524930] Re: "ACPI PCC probe failed" message is an error message when it should be debug
Linux golcuk-G31M-ES2L 3.19.0-49-generic #55~14.04.1-Ubuntu SMP Fri Jan
22 11:24:31 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
"ACPI PCC probe failed" message is an error message when it should be
Status in linux package in Ubuntu:
Status in linux source package in Vivid:
Users of Ubuntu Vivid 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.
This fix landed in Wily, and the driver with the alarming message only
Upstream commit efd756daf4ddae3cec2404c4e0b680b7cfdd6a45 ("ACPI / PCC: Use pr_debug() for debug messages in pcc_init()")
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.
To manage notifications about this bug go to: