Arch Linux

onTheDev

Member

Registered: 2014-08-02

Posts: 6

acpi:error when booting the install

Hi guys,
So I want to install Arch, but when I boot into the install USB I directly see the following error:
ACPI: ERROR installing CMOS-RTC region handler
I saw here that apparently it's a kernel bug since the 3.15.3 version. The latest download has the 3.15.7 version.
First, I wanted to know if others came across this issue while installing.
I also wondered if it's worth to install with an older kernel (if possible) or just wait for a fix..

mkoskar

Member

Registered: 2014-07-16

Posts: 64

Website

Re: acpi:error when booting the install

It doesn't block you from proceeding with install right?
If so, that just ignore it and proceed with install.

Your resulting installation will use most up-to-date kernel which is also "3.15.7-1-ARCH" (as of now) so that might indicate, that you might see this error also after installation.
Nevertheless, it's a not a deal-breaker, and just without looking into it much deeper it doesn't sound critical (CMOS Real Time Clock, is indeed not critical piece of system), tough you might see some problems with RTC subsystem.
Quickly skimming over the thread you linked, I don't see any relevant symptoms people are having there.  I see different errors in my journal during boot. Reported as errors, but to be understood as warnings.
It's not so much beneficial to get over-excited about every red line in your journal, if there is not any documented real negative side-effects, usually this small issues tend to come and go, but it's always good to keep an eye on them.

If it bothers you though, you can install with downgraded kernel (but I don't think this error justifies doing so).

onTheDev

Member

Registered: 2014-08-02

Posts: 6

Re: acpi:error when booting the install

The thing is, the error pops up continuously so it's really annoying to type commands. Maybe you know a way to stop it?

mkoskar

Member

Registered: 2014-07-16

Posts: 64

Website

Re: acpi:error when booting the install

The thing is, the error pops up continuously so it's really annoying to type commands. Maybe you know a way to stop it?

Aha, I assume switching to other VC (e.g., Alt+2) doesn't help with that.
If so, then when you are about to boot installation media, (e.g., I didn't do it for longest time myself), so assuming it's a GRUB you want to edit the kernel cmd line.
That should be done by pressing ESC so that it doesn't boot automatically (just in case) and then for GRUB, you should see the help somewhere on the bottom, if I can recall correctly by pressing 'e' you will be editing boot entry.
Then make sure to append to the line starting with "linux /vmlinuz-linux root=..." (carefull it will be probably wrapped to more lines):

quiet loglevel=3

You should still be able to see error in "$ dmesg".

onTheDev

Member

Registered: 2014-08-02

Posts: 6

Re: acpi:error when booting the install

I will try that. Thanks a lot!

EDIT: So I haven't installed arch yet, but I booted the install media after modifying GRUB like you said and no error popping up

Last edited by onTheDev (2014-08-02 11:30:56)