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Re: How To Fix: Firewire IRQ Errors on Reboot

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After some experimentation, I found that if you use "irqpoll" in the 
Grub command line, you'll end up with buffer underrun errors on a 
Lenovo/IBM ThinkPad T61.

Substitute this:

GRUB_CMDLINE_LINUX="irqpoll"

With this:

GRUB_CMDLINE_LINUX="noirqdebug"

[original post below:]

To: debian-user@lists.debian.org
Subject: How To Fix: Firewire IRQ Errors on Reboot
From: RavenLX <ravenlx@sitesplace.net>
Date: Wed, 7 Jun 2017 09:25:52 -0400
Message-id: <[?] 5abcce6c-1786-f85c-5ffe-4f9821aac3db@sitesplace.net>

I would like to share another discovery. This one fixed my firewire IRQ 
errors when rebooting my ThinkPad T61.

(Not-So-Obligatory) Disclaimer:
-------------------------------

While, I do not notice any change in overall functionality of the laptop 
as a result of this fix, I also do not know what the referenced setting 
is really used for. Do this at your own risk! I hold no responsibility 
for the outcome!

System:
-------

IBM/Lenovo ThinkPad T61 Laptop
* This may (or may not) work on other ThinkPad Laptops.

Debian 9 (Stretch) RC4
4.9.0-3-amd64 #1 SMP Debian 4.9.25-1 (2017-05-02)

Problem Description:
--------------------

I came across the following errors whenever rebooting:

irq 17: nobody cared (try booting with the "irqpoll" option
handlers:
[<fffffffc01b8c10] irq_handler [firewire_ohci]
[<fffffffc0074040] usb_hcd_irq [usbcore]
Disabling IRQ #17

How To Fix:
-----------

Edit as root: /etc/default/grub

Change:

GRUB_CMDLINE_LINUX=""

To:

GRUB_CMDLINE_LINUX="irqpoll"

NOTE: If you have another option in the command line, then use spaces to 
separate each option. Example:

GRUB_CMDLINE_LINUX="[option1] irqpoll"

$ sudo update-grub

(NOTE: The 2nd reboot should show no more errors.)

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How To Fix: Firewire IRQ Errors on Reboot RavenLX <ravenlx@sitesplace.net> - 2017-06-07 15:30 +0200
  Re: How To Fix: Firewire IRQ Errors on Reboot RavenLX <ravenlx@sitesplace.net> - 2017-08-11 06:00 +0200

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