Kernel Bug Tracker – Bug 42979
Regression In 3.2.12 stable prevents various system types from booting
Last modified: 2012-05-27 06:39:00 UTC
Possible regression in v3.2.12 stable. The issue prevents systems from booting.
There have been a few bugs reported against the Ubuntu kernel, which
was recently rebased to 3.2.12. We're in the process of bisecting now
and will post an update.
There are also reports that this bug exists in v3.3.
The following commit appears to have caused the regression:
f043ddb60c84ea64a23b755004572afe922e653c PCI: ignore pre-1.1 ASPM
quirking when ASPM is disabled
diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c
index 1cfbf22..24f049e 100644
@@ -500,6 +500,9 @@ static int pcie_aspm_sanity_check(struct pci_dev *pdev)
+ if (aspm_disabled)
+ return 0;
* Some functions in a slot might not all be PCIe functions,
* very strange. Disable ASPM for the whole slot
Discussion on LKML:
Similar problem reported by some archlinux users, at first we thought it was a problem with a certain Gigabyte motherboard, but others have reported this problem aswell.
For more info see:
Unable to boot both 3.2.12 and 3.3
But both 3.2.12 and 3.3 boot with kernel parameter "pcie_aspm=force"
Same problem here with Arch Linux kernel 3.2.12 on an Asus P8P67 board. Boots fine with "pcie_aspm=force".
Same on Intel DP67BG.
Created attachment 72732 [details]
This patch works for me.
Created attachment 72742 [details]
ASPM: Fix pcie devices with non-pcie children
Does this patch help?
(taken from <http://thread.gmane.org/gmane.linux.kernel.pci/14503>)
Applied as c9651e70ad0aa499814817cbf3cc1d0b806ed3a1. Closing.
I have exactly the same issue again with vanilla 3.4.0. At least symptoms are the same. Any ideas?
(In reply to comment #9)
> I have exactly the same issue again with vanilla 3.4.0. At least symptoms are
> the same. Any ideas?
Do you mean that reverting f043ddb60c84 gets your machine to boot?
Or some other symptom?
I didn't try reverting the commit you mentioned, but symptoms I have with 3.4.0 are exactly the same as I had with 3.2.12, 3.2.13, and 3.3.0: System hangs immediately after boot with fancy flashing screen. Passing any pcie_aspm parameters doesn't help. Though I'm able to boot 3.4.0 using working kernel and then kexec'ing to 3.4.0. As I can remember, the commit f043ddb60c84 solved my problem with 3.2.12.
(In reply to comment #11)
> I didn't try reverting the commit you mentioned, but symptoms I have with 3.4.0
> are exactly the same as I had with 3.2.12, 3.2.13, and 3.3.0: System hangs
> immediately after boot with fancy flashing screen. Passing any pcie_aspm
> parameters doesn't help. Though I'm able to boot 3.4.0 using working kernel and
> then kexec'ing to 3.4.0. As I can remember, the commit f043ddb60c84 solved my
> problem with 3.2.12.
Thanks. That sounds like a totally different bug. I'd suggest contacting
firstname.lastname@example.org, and bisecting or getting a log with netconsole
if possible in order to track it down.
Hope that helps,