Latest working kernel version: Earliest failing kernel version: Distribution:Archlinux Hardware Environment: * Intel Core2Duo 2.4 ghz * Foxconn P9657AA-8EKRS2H (P965+ICH8R) * Jmicron JB361 Problem Description: When I disable ACPI the DVD burner is not detected. It keeps probing it. I disabled ACPI since I still have stability problems with acpi enabled (see bug report http://bugzilla.kernel.org/show_bug.cgi?id=10572) I tried several kernels: - Original Archlinux kernel 2.6.26 - 2.6.27-rc1-Zenmm1 with latest libata-dev from git With all tested kernels the symptons are the same, when ACPI=off the dvd isn't detected and it works direct when ACPI=on I attach the output of the dmesg with and without acpi=on and lspci -vvv Note: I'm on holiday from 28-8 till 19-9 so don't expect fast response.
Created attachment 17457 [details] Dmesg output with ACPI=off where the problem exist
Created attachment 17458 [details] Lspci output
Created attachment 17459 [details] Dmesg output when ACPI=on when the dvd burner is detected
Your machine appears to only provide valid IRQ routing information when ACPI is enabled, that is quite common with modern systems.
(In reply to comment #4) > Your machine appears to only provide valid IRQ routing information when ACPI > is > enabled, that is quite common with modern systems. > What is then the proposed solution for this? Or is there no solution
Does irqpoll work?
No irqpoll does not work. With the latest kernel the probing is gone, however the dvd burner is not detected: This is the output: ata9.00: ATAPI: Optiarc DVD RW AD-7173A, 1-M1, max UDMA/66 ata9.00: configured for UDMA/66 ata9.00: qc timeout (cmd 0xa0) ata9.00: TEST_UNIT_READY failed (err_mask=0x5) ata9.00: configured for UDMA/66 ata9.00: qc timeout (cmd 0xa0) ata9.00: TEST_UNIT_READY failed (err_mask=0x5) ata9.00: limiting speed to UDMA/66:PIO3 ata9.00: configured for UDMA/66 ata9.00: qc timeout (cmd 0xa0) ata9.00: TEST_UNIT_READY failed (err_mask=0x5) ata9.00: disabled ata9: soft resetting link ata9: EH complete
It's still the same problem. IRQ routing doesn't work with acpi turned off and for some reason irqpoll can't work around it. The proper solution would be fixing the ACPI problem. What breaks with acpi turned on?
The problem with ACPI can be found here: I disabled ACPI since I still have stability problems with acpi enabled (see bug report http://bugzilla.kernel.org/show_bug.cgi?id=10572) Right now I prefer a not working dvd burner to an instable system (I burn dvd's on my MBP)