On 6/24/09, Frédéric Boiteux <fboiteux@xxxxxxxxxxxx> wrote: > Le Wed, 24 Jun 2009 13:31:39 +0100, > Alan Jenkins <sourcejedi.lkml@xxxxxxxxxxxxxx> a écrit : > >> On 6/24/09, Frédéric Boiteux <fboiteux@xxxxxxxxxxxx> wrote: >> > … >> > I've tried, but the proposed workaround doesn't work here :-( >> > I've booted with 'initcall_debug' option to have some more messages, >> > look at dmesg's file joined to this e-mail. >> >> Weird. You said earlier that acpi_enforce_resources=strict solved >> your problem on 2.6.29, so this looks like a regression in 2.6.30. >> >> [ 0.000000] Kernel command line: root=LABEL=racine ro vga=788 >> acpi_enforce_resources=strict init=/sbin/bootchartd initcall_debug >> >> [ 11.795501] i801_smbus 0000:00:1f.3: PCI INT B -> GSI 19 (level, >> low) -> IRQ 19 >> >> The point of acpi_enforce_resources=strict was to prevent drivers like >> i801_smbus binding to devices already handled by an ACPI BIOS. It was >> this conflict that was believed to cause the delay. >> >> What we want to see, which you should see on 2.6.29 with the "strict" >> boot option, is something like this: >> >> [ 0.881441] i801_smbus 0000:00:1f.3: PCI INT C -> GSI 18 (level, >> low) -> IRQ 18 >> [ 0.881441] ACPI: I/O resource 0000:00:1f.3 [0x400-0x41f] >> conflicts with ACPI region SMRG [0x400-0x40f] >> [ 0.881441] ACPI: Device needs an ACPI driver >> [ 0.881441] i801_smbus: probe of 0000:00:1f.3 failed with error -16 > > Yes, I had this kind of messages with 2.6.29 kernel, but not in 2.6.30. > >> As a workaround / sanity check, can you avoid the delay on 2.6.30 if >> you blacklist the i801_smbus module? > > I've blacklisted the 'i2c_i801' module (responsible from i801_smbus > message), and yes, the boot delay disappeared ! :-) > > If I can help to track this bug, I can do some tests. > > Many thanks, > Fred. > Thanks for your responsiveness. I've created a kernel bugzilla entry. <http://bugzilla.kernel.org/show_bug.cgi?id=13620> Can you please add as attachments: 1. dmesg for 2.6.29 with acpi_enforce_resources=strict 2. the output of acpidump (it's a debian package) You will need to create a kernel bugzilla account if you haven't already got one. Thanks Alan -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
