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During startup, I noticed some error. I found this in dmesg:

i801_smbus 0000:00:1f.3: PCI INT B -> GSI 21 (level, low) -> IRQ 21
ACPI: I/O resource 0000:00:1f.3 [0x400-0x41f] conflicts with ACPI region SMRG [0x400-0x40f]
ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver

What does this mean? Which device is it talking about and how do I know which driver I should install?

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Do you have any specific problem (e.g. system crashes, error messages)? – Renan Feb 26 '12 at 0:20
The only problem I have, is if the monitor goes to sleep, then it seem impossible to turn it back on, but I do not know if this problem is related to the error in dmesg. – Village Feb 26 '12 at 0:56
I see no relation, but I might be wrong, esp. since SMbus (to which the first line of the message refers) can be used for power management. – Renan Feb 26 '12 at 2:42
up vote 3 down vote accepted

According to this post in the Linux kernel mailing-list, it should not mean a problem:

Unless you need to use anything on SMBus (hardware sensors, essentially) you don't have to worry about that one. It means that the kernel has detected that the BIOS may potentially access the SMBus controller which may conflict with usage of the controller from within the OS.

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