Distribution: Ubuntu Gutsy Hardware Environment: Dell Latitude D620 Software Environment: Linux cimer 2.6.22-9-generic #1 SMP Fri Aug 3 00:50:37 GMT 2007 i686 GNU/Linux Problem Description: I've got the following messages in dmesg: PCI: Bus #04 (-#07) is hidden behind transparent bridge #03 (-#04) (try 'pci=assign-busses') Please report the result to linux-kernel to fix this permanently So here is the report. Attachments to follow.
Created attachment 12425 [details] Dmesg before setting assign-busses (this asks for the report)
Created attachment 12426 [details] Dmesg after setting pci=assign-busses
Created attachment 12427 [details] Results of "lspci -vvv" (with pci=assign-busses set)
I've seen similar bugs, including http://bugzilla.kernel.org/show_bug.cgi?id=8074 and http://bugzilla.kernel.org/show_bug.cgi?id=8591 I'm not sure I understand the comments of Bernhard Kaindl. Is this just a "leftover" warning that should be removed (thus the reports are mostly useless), or is there actually an issue?
Oh, and another question: should I leave the pci=assign-busses set or not?
Is this just a warning which I left in to be sure that the reason for it is properly dealt with, but we removed it from the normal user's sight now because we found * that the PCI misconfiguration which is being indicated in this message only seems to be an issue with CardBus. * that the CardBus fixup code which we have in place since 2.6.18 with appears to be sufficient. Thus, I submitted a patch which was merged mainline with 2.6.22.6 and 2.6.23 that turns it into a message which is only enabled when debugging PCI, so in practical users terms, the warning is gone. *** This bug has been marked as a duplicate of bug 7531 ***