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Message #150747
[Bug 1524930] [NEW] "ACPI PCC probe failed" message is an error message when it should be debug
Public bug reported:
[SRU Justification][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. :
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.
** Affects: linux (Ubuntu)
Importance: Low
Assignee: Colin Ian King (colin-king)
Status: Incomplete
** Changed in: linux (Ubuntu)
Importance: Undecided => Low
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Colin Ian King (colin-king)
** Description changed:
[SRU Justification][Vivid]
- Users of Ubuntu wily are seeing a seemingly alarming kernel failure
+ 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. :
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.
--
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https://bugs.launchpad.net/bugs/1524930
Title:
"ACPI PCC probe failed" message is an error message when it should be
debug
Status in linux package in Ubuntu:
Incomplete
Bug description:
[SRU Justification][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.
: 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.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1524930/+subscriptions
Follow ups
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[Bug 1524930] Re: "ACPI PCC probe failed" message is an error message when it should be debug
From: Mutlu Can YILMAZ, 2016-02-11
-
[Bug 1524930] Re: "ACPI PCC probe failed" message is an error message when it should be debug
From: Colin Ian King, 2016-02-10
-
[Bug 1524930] Re: "ACPI PCC probe failed" message is an error message when it should be debug
From: Mutlu Can YILMAZ, 2016-02-10
-
[Bug 1524930] Re: "ACPI PCC probe failed" message is an error message when it should be debug
From: Colin Ian King, 2016-02-02
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[Bug 1524930] Re: "ACPI PCC probe failed" message is an error message when it should be debug
From: Andy Whitcroft, 2016-02-02
-
[Bug 1524930] Re: "ACPI PCC probe failed" message is an error message when it should be debug
From: Colin Ian King, 2016-01-14
-
[Bug 1524930] Re: "ACPI PCC probe failed" message is an error message when it should be debug
From: Luis Henriques, 2016-01-14
-
[Bug 1524930] Re: "ACPI PCC probe failed" message is an error message when it should be debug
From: Colin Ian King, 2016-01-14
-
[Bug 1524930] Re: "ACPI PCC probe failed" message is an error message when it should be debug
From: Luis Henriques, 2016-01-11
-
[Bug 1524930] Re: "ACPI PCC probe failed" message is an error message when it should be debug
From: Colin Ian King, 2016-01-08
-
[Bug 1524930] Re: "ACPI PCC probe failed" message is an error message when it should be debug
From: Max Payne, 2016-01-08
-
[Bug 1524930] Re: "ACPI PCC probe failed" message is an error message when it should be debug
From: Max Payne, 2016-01-08
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[Bug 1524930] Re: "ACPI PCC probe failed" message is an error message when it should be debug
From: Colin Ian King, 2015-12-16
-
[Bug 1524930] Re: "ACPI PCC probe failed" message is an error message when it should be debug
From: Christopher M. Penalver, 2015-12-16
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[Bug 1524930] Missing required logs.
From: Brad Figg, 2015-12-10