Ubuntu 7.04/Issues/USB-SATA race condition causes hang - Revision history

Jose de la rosa at 14:34, 1 November 2007

2007-11-01T14:34:58Z

← Older revision		Revision as of 14:34, 1 November 2007
Line 2:		Line 2:
	<br>'''Systems Affected:''' Dimension 530n.		<br>'''Systems Affected:''' Dimension 530n.
	<br>'''Impact:''' Systems hangs during boot up.		<br>'''Impact:''' Systems hangs during boot up.
-	<br>'''Workaround:''' Force ~~piix~~ driver to load before ~~usb~~ driver. ~~Use following~~ script ~~and run as root~~:	+	<br>'''Workaround:''' Force SATA driver to load before USB driver. Create a script named load_ata_piix in /usr/share/initramfs-tools/scripts/init-top/ with the following contents:

	#!/bin/sh		#!/bin/sh
-	~~# Place this in /usr/share/initramfs-tools/scripts/init-top/~~
	PREREQ=""		PREREQ=""
	prereqs()		prereqs()
Line 20:		Line 19:
	modprobe -Qb ata_piix		modprobe -Qb ata_piix

-	~~After running this~~ script~~, execute as root~~:	+	Execute the script:

-	$ ~~update-~~initramfs -u -~~k all~~	+	$ sudo /usr/share/initramfs-tools/scripts/init-top/load_ata_piix

-	~~This command will~~ rebuild the initrd so that the kernel will probe for the SATA driver before the USB driver.	+	Next, rebuild the initrd so that the kernel will probe for the SATA driver before the USB driver:

-	~~'''Fix:''' In progress.<br>~~	+	$ sudo update-initramfs -u -k all

Jose at 15:39, 17 July 2007

2007-07-17T15:39:39Z

← Older revision		Revision as of 15:39, 17 July 2007
Line 2:		Line 2:
	<br>'''Systems Affected:''' Dimension 530n.		<br>'''Systems Affected:''' Dimension 530n.
	<br>'''Impact:''' Systems hangs during boot up.		<br>'''Impact:''' Systems hangs during boot up.
-	<br>'''Workaround:''' Force piix driver to load before usb driver. Use following script:	+	<br>'''Workaround:''' Force piix driver to load before usb driver. Use following script and run as root:

	#!/bin/sh		#!/bin/sh
Line 19:		Line 19:
	esac		esac
	modprobe -Qb ata_piix		modprobe -Qb ata_piix
		+
		+	After running this script, execute as root:
		+
		+	$ update-initramfs -u -k all
		+
		+	This command will rebuild the initrd so that the kernel will probe for the SATA driver before the USB driver.

	'''Fix:''' In progress.<br>		'''Fix:''' In progress.<br>

Jose: Ubuntu 7.04/Issues/USB-SATA race condition causes hang on 530n moved to Ubuntu 7.04/Issues/USB-SATA race condition causes hang

2007-07-13T19:42:07Z

Ubuntu 7.04/Issues/USB-SATA race condition causes hang on 530n moved to Ubuntu 7.04/Issues/USB-SATA race condition causes hang

← Older revision

Revision as of 19:42, 13 July 2007

Jose at 22:06, 11 July 2007

2007-07-11T22:06:22Z

← Older revision		Revision as of 22:06, 11 July 2007
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-	<br>'''Description:''' ~~USB drivers initialize before the ATA devices by default. This causes the~~ USB device ~~to misread the~~ interrupts intermittently (due to a race condition~~) if the interrupts start queuing before the~~ ATA ~~device is loaded~~.	+	<br>'''Description:''' USB device misreads interrupts intermittently due to race condition with ATA driver.
	<br>'''Systems Affected:''' Dimension 530n.		<br>'''Systems Affected:''' Dimension 530n.
	<br>'''Impact:''' Systems hangs during boot up.		<br>'''Impact:''' Systems hangs during boot up.

Jose: New page:
'''Description:''' USB drivers initialize before the ATA devices by default. This causes the USB device to misread the interrupts intermittently (due to a race condition) if the interr...

2007-07-11T21:06:15Z

New page: '''Description:''' USB drivers initialize before the ATA devices by default. This causes the USB device to misread the interrupts intermittently (due to a race condition) if the interr...

New page

'''Description:''' USB drivers initialize before the ATA devices by default. This causes the USB device to misread the interrupts intermittently (due to a race condition) if the interrupts start queuing before the ATA device is loaded.
 '''Systems Affected:''' Dimension 530n.
 '''Impact:''' Systems hangs during boot up.
 '''Workaround:''' Force piix driver to load before usb driver. Use following script:

#!/bin/sh
# Place this in /usr/share/initramfs-tools/scripts/init-top/
PREREQ=""
prereqs()
{
echo "$PREREQ"
}
case $1 in
# get pre-requisites
prereqs)
prereqs
exit 0
;;
esac
modprobe -Qb ata_piix

'''Fix:''' In progress.

Ubuntu 7.04/Issues/USB-SATA race condition causes hang - Revision history

Jose de la rosa at 14:34, 1 November 2007

Jose at 15:39, 17 July 2007

Jose: Ubuntu 7.04/Issues/USB-SATA race condition causes hang on 530n moved to Ubuntu 7.04/Issues/USB-SATA race condition causes hang

Jose at 22:06, 11 July 2007

Jose: New page: '''Description:''' USB drivers initialize before the ATA devices by default. This causes the USB device to misread the interrupts intermittently (due to a race condition) if the interr...

Jose: New page:
'''Description:''' USB drivers initialize before the ATA devices by default. This causes the USB device to misread the interrupts intermittently (due to a race condition) if the interr...