When using radeonhd driver I get randomly once in a while the following warning messages from the kernel:
kernel: Uhhuh. NMI received for unknown reason a0 on CPU 0.
kernel: You have some hardware problem, likely on the PCI bus.
kernel: Dazed and confused, but trying to continue
As far as I remember these messages started to appear with the following commit:
My current version is:
(II) RADEONHD: version 1.0.0, built from git branch master, commit 9fe776ed
Hrm, yes, with this change, the card no longer listens to x86 IO accesses.
I will try and check whether we can have working lid close even through allowing this.
I have seen "spurious NMI" messages when using fglrx a while past. It seems that those NMI are something inherent to the ATI chips.
Some hardware seems to be allergic to PIO accesses when there is not taker. So once the BIOS lid close issues are settled we may have to reenable PIO in PCI config space again.
Does this issue occur with the preferred ati driver (xf86-vide-ati)? If so, please move this to the Driver/Radeon component.
Development of radeonhd has pretty much halted and development focus is on the ati driver. Please see http://www.x.org/wiki/radeonhd
If the issue does not exist in the ati driver (or if there is no response to this message), this bug will be closed as WONTFIX unless someone contributes a patch.
Closing due to lack of response. Please reopen and move to the Driver/Radeon
component if this issue persists with xf86-video-ati