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Old 10-27-2010, 07:57 PM   #1
holister
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How serious is this conflict? ACPI: I/O resource... conflicts with region SMBI


Maybe I'm not asking "google" the right questions but I haven't been able to get an understanding of what this means and what the potential ramifications are. I finally convinced my boss to go fully-Linux and of course, within hours I was flooded with "come take a look at my machine" calls.

Toshiba laptop A205 -> Debian "Lenny" - 2.6.32-backports kernel (about 2 yrs old)
Toshiba laptop L655 -> Debian "Squeeze" 2.6.32 stock kernel and 2.6.36 compiled kernel (brand new machine)
I've compiled 2.6.36 kernel with settings targeting this machine and just a generic compile of 2.6.36. Conflict remains.

Both have latest BIOS.

Both machines have this in "dmesg":
Code:
...
ACPI: I/O resource 0000:00:1f.3... conflicts with region SMBI...
...

Last edited by holister; 10-29-2010 at 01:03 AM.
 
Old 10-28-2010, 12:30 AM   #2
jefro
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http://forum.soft32.com/linux/ACPI-r...ict479956.html

It is an acpi versus some other resource deal (may be same as above). It could cause a crash. The fix may be to look at the other device and acpi both in bios and in software drivers.

Last edited by jefro; 10-28-2010 at 12:31 AM.
 
Old 10-28-2010, 10:00 AM   #3
holister
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Quote:
Originally Posted by jefro View Post
Thank you for the reply. I've seen that thread and I've tried to "register" there to get help but kept getting "connection to server timeout". After about 4 days of trying (cookies on/off, etc...), I decided to start this one.

Quote:
It is an acpi versus some other resource deal (may be same as above). It could cause a crash. The fix may be to look at the other device and acpi both in bios and in software drivers.
lspci shows that resource as: SMBus: Intel Corp 5 series / 3400 Series Chipset SMBus Controler. The rest of the hardware also shows "Intel Corp 5 Series / 3400 Series... PCI express controller, USB controller, SATA controller, etc..." . So is that all controlled by one driver or do I need to find the "SMBus" driver specifically. And I'm not sure what to do about it / look for in BIOS.

I just found something else: dmesg | grep ACPI . There is a line saying "If ACPI driver is available... you should use it instead of the native driver"

lspci -nnk - lists various "kernel drivers in use" but SMBus doesn't list a driver. But then "PCI bridge" doesn't list any drivers in use either but there are no errors for that hardware. Am I at least looking it the right place? Thank you.

Last edited by holister; 10-29-2010 at 01:05 AM.
 
Old 10-28-2010, 07:53 PM   #4
jefro
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Well, lets do some tests then. How about we boot to some other live cd and see what happens. Use maybe Fedora.

My guess is many bios will allow some changes. Don't just yet until we see how fedora see's them.
 
Old 10-29-2010, 01:02 AM   #5
holister
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Quote:
Originally Posted by jefro View Post
... see how fedora see's them.
That's actually the first thing I did, is to see how other distros/kernels see it and update all BIOS. So... (all latest stable releases)

Fedora -> same conflict
OpenSuse -> same conflict and more
Kubuntu -> same conflict

Plus I just found 2 more laptops (different models) with same conflict. All Toshibas and all same "resource" 0000:00:1f.3 conflict. I really appreciate you trying to help.
 
Old 10-29-2010, 01:58 AM   #6
paulsm4
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Hi - a few more links that might help:

http://seehuhn.de/pages/toshiba

http://lkml.indiana.edu/hypermail/li...3.3/00014.html

http://tldp.org/HOWTO/ACPI-HOWTO/

http://www.spinics.net/lists/linux-acpi/msg30207.html

Quote:

http://mb-monkeypoo.blogspot.com/

have a read everything I could find from google-ing the annoying "Unsupported thinkpad detected!" message that I have been getting at startup with every linux distribution.

"Waiting for /dev to be fully populated...[ 5.609978] ACPI I/O resource 0000:00:1f.3 [0x1c00d-0x1c1f] conflicts with ACPI region SMBI [0x1c00d-0x1c0f]"

Removing bluetooth at start up and blacklisting thinkpad_acpi and now I have a smooth boot and shutdown but no sleep. But everything else works wonderfully and smooth. You can definitely notice the switch to the more stable debian base. Packages run much smoother and with less resources than when used in Ubuntu base. Video playback is actually better than the performance I get in windows 7 with this notebook. In windows the video playback is choppy and actually performs like older versions of ubuntu on unsupported intel graphics. I am stunned to find that multi-media is better in linux.
Q: Is this warning actually causing any problems, or are you just worried about it?

Q: Have you considered building your generic kernel with this option:
"acpi_enforce_resources=lax"

Last edited by paulsm4; 10-29-2010 at 02:18 AM.
 
Old 10-29-2010, 06:12 PM   #7
jefro
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Also look at bios choices. Do they offer acpi versions? Does it allow any resources to be changed?
 
Old 11-04-2010, 07:26 PM   #8
holister
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Quote:
Originally Posted by paulsm4 View Post
Q: Is this warning actually causing any problems, or are you just worried about it?
I now have 11 office machines (all Toshibas) with this exact error. No other errors. Reports of "issues" are:

1) Login manager fails to start and drops to a shell. Reboot and it's fine. Sometimes, it drops to a shell 2-3 consecutive times, reboot and then fine.

2) Once logged in, lots of crashes (although I believe these are KDE issues (example: can watch "youtube" in the small window but clicking the "full screen" button locks up the system. Reproducible every time. Unable to "kill" processes, ctrl+alt+bckspace no longer logs out (KDE4),etc...). So they do a hard power-off

3) Several reports of empty folders disapearing on next login. I've tested it. Make 3 folders, put files into one and reboot. The two empty are gone. Re-create the other two, put files into second one, reboot and third (empty) folder is gone. This happened on several machines. Unable to reproduce at will, though. Sometimes it's fine.

So... everyone blames it on the ACPI conflict issue (and me ).


Quote:
Originally Posted by paulsm4 View Post
Q: Have you considered building your generic kernel with this option:
"acpi_enforce_resources=lax"
I've read a bunch on this option and most of the threads are by kernel developers and beyond my understanding. What, exactly are the ramifications of building a kernel with this option?

Quote:
Originally Posted by jefro View Post
Also look at bios choices. Do they offer acpi versions? Does it allow any resources to be changed?
The systems have a plane-jane Phoenix BIOS and unless I'm missing something, or not looking at the right items, there isn't much to be changed in there.

I have, however, confirmed that this hardware (0000:00:1f.3) conflict is regarding the i801_smbus. And I have run into a system which HAS the i801_smbus but DOES NOT have the conflict.

Where would I start looking to see why this one system does not have the conflict so I can maybe apply it to all the rest that do?

Thank you for the help
 
Old 11-04-2010, 09:05 PM   #9
jefro
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Well, seems that the OS knows there is a problem to begin with. I would suspect that some problem may exist but from other posts they say no.

"This error message means that the kernel has automatically resolved the
conflict by preventing the i801_smbus (native) driver from using the
IO-ports which are also used by the BIOS. So far as I can see, no
damage will be done."

From here http://www.linuxquestions.org/questi...nflict-841730/
 
Old 11-10-2010, 06:56 PM   #10
holister
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Thank you so much for the info and that link. paulsm4 make it clear (in... umm... no uncertain terms ) that the message is "benign".
 
  


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