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I have this problem with my pc:

[    0.545187]ACPI PCC PROBE FAILED. STARTING VERSION 219
[    240.096017] INFO: task systemd-udev:376 blocked for more than 120 seconds.
[    240.096060] Not tainted 3.19.0-15-generic #15-ubuntu
[    240.096097]"echo 0> /proc/sys/kernel/hung_task_timeout_secs" disables this message.............

Well, the message duplicates, and the OS doesn't start, so I had to reboot my pc. However the problem appears periodically, I hope someone can help with this.

Jan
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JESUS0414
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2 Answers2

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Try to boot using the nomodeset option. To do this:

  1. Restart your computer and select Advanced Options from the grub menu

  2. Highlight the kernel that you want to boot into and press e to edit it.

  3. Find the line that says "quiet splash" and replace it with:

"quiet splash nomodeset"

  1. press F10 to boot.

Is it working?

Jan
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Ron
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0

It is possible that this is the last message you see and that the problem is something completely unrelated.

So it looks like you build the PCC mailbox driver which is new in 3.19-rc and that driver fails to load, because it doesn't find hardware to work with.

The message is harmless, but it also is not useful. The driver in question seems to be overly verbose to me in general.

From Boot Error - ACPI PCC Probe Failed

PCC (Platform Communication Channel) is a recent ACPI 5.0 addition. The driver does not find a PCC communications mailbox and just exits with that error message. It is not something to worry about, most machines don't have an ACPI PCCT table and they don't use this mechanism. References: ACPI specification Chapter 14.0 "Platform Communications Channel" Linux source: drivers/mailbox/pcc.c

From https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1430625

Also: https://bugzilla.kernel.org/show_bug.cgi?id=92551

Community
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Jan
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