Most recent kernel where this bug did not occur:- Distribution:Debian AMD64 Stable Hardware Environment:Dual Xeon x86_64 + HT Software Environment:- Problem Description: On two different servers with 2Gb RAM, I am experiencing no problems. However, as soon as they were upgraded to 4Gb and 6Gb RAM, the USB sub-system breaks. Relevant dmesg output is: USB Universal Host Controller Interface driver v2.3 ACPI: PCI Interrupt 0000:00:1d.0[A] -> GSI 16 (level, low) -> IRQ 16 PCI: Setting latency timer of device 0000:00:1d.0 to 64 uhci_hcd 0000:00:1d.0: UHCI Host Controller uhci_hcd 0000:00:1d.0: new USB bus registered, assigned bus number 1 uhci_hcd 0000:00:1d.0: irq 16, io base 0x0000ace0 usb usb1: configuration #1 chosen from 1 choice hub 1-0:1.0: USB hub found hub 1-0:1.0: 2 ports detected GSI 20 sharing vector 0xC9 and IRQ 20 ACPI: PCI Interrupt 0000:00:1d.1[B] -> GSI 19 (level, low) -> IRQ 20 PCI: Setting latency timer of device 0000:00:1d.1 to 64 uhci_hcd 0000:00:1d.1: UHCI Host Controller uhci_hcd 0000:00:1d.1: new USB bus registered, assigned bus number 2 uhci_hcd 0000:00:1d.1: irq 20, io base 0x0000acc0 usb usb2: configuration #1 chosen from 1 choice hub 2-0:1.0: USB hub found hub 2-0:1.0: 2 ports detected GSI 21 sharing vector 0xD1 and IRQ 21 ACPI: PCI Interrupt 0000:00:1d.2[C] -> GSI 18 (level, low) -> IRQ 21 PCI: Setting latency timer of device 0000:00:1d.2 to 64 uhci_hcd 0000:00:1d.2: UHCI Host Controller uhci_hcd 0000:00:1d.2: new USB bus registered, assigned bus number 3 uhci_hcd 0000:00:1d.2: irq 21, io base 0x0000aca0 usb usb3: configuration #1 chosen from 1 choice hub 3-0:1.0: USB hub found hub 3-0:1.0: 2 ports detected GSI 22 sharing vector 0xD9 and IRQ 22 ACPI: PCI Interrupt 0000:00:1d.7[D] -> GSI 23 (level, low) -> IRQ 22 PCI: Setting latency timer of device 0000:00:1d.7 to 64 ehci_hcd 0000:00:1d.7: EHCI Host Controller ehci_hcd 0000:00:1d.7: debug port 1 PCI: cache line size of 128 is not supported by device 0000:00:1d.7 ehci_hcd 0000:00:1d.7: new USB bus registered, assigned bus number 4 ehci_hcd 0000:00:1d.7: irq 22, io mem 0xdff00000 ehci_hcd 0000:00:1d.7: USB 2.0 started, EHCI 1.00, driver 10 Dec 2004 usb usb4: configuration #1 chosen from 1 choice hub 4-0:1.0: USB hub found hub 4-0:1.0: 6 ports detected usb 1-1: new full speed USB device using uhci_hcd and address 2 nommu_map_single: overflow 13faa9a20+8 of device mask ffffffff nommu_map_single: overflow 13f433480+64 of device mask ffffffff nommu_map_single: overflow 13faa9a20+8 of device mask ffffffff nommu_map_single: overflow 13f433480+64 of device mask ffffffff nommu_map_single: overflow 13faa9a20+8 of device mask ffffffff nommu_map_single: overflow 13f433480+64 of device mask ffffffff usb 4-3: new high speed USB device using ehci_hcd and address 3 nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff nommu_map_single: overflow 13fd31fc0+64 of device mask ffffffff nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff nommu_map_single: overflow 13fd31fc0+64 of device mask ffffffff nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff nommu_map_single: overflow 13fd31fc0+64 of device mask ffffffff usb 4-3: device descriptor read/64, error -32 nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff nommu_map_single: overflow 13fd31fc0+64 of device mask ffffffff nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff nommu_map_single: overflow 13fd31fc0+64 of device mask ffffffff nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff nommu_map_single: overflow 13fd31fc0+64 of device mask ffffffff usb 4-3: device descriptor read/64, error -32 usb 4-3: new high speed USB device using ehci_hcd and address 4 nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff nommu_map_single: overflow 13fd31fc0+64 of device mask ffffffff nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff nommu_map_single: overflow 13fd31fc0+64 of device mask ffffffff nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff nommu_map_single: overflow 13fd31fc0+64 of device mask ffffffff usb 4-3: device descriptor read/64, error -32 nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff nommu_map_single: overflow 13fd31fc0+64 of device mask ffffffff nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff nommu_map_single: overflow 13fd31fc0+64 of device mask ffffffff nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff nommu_map_single: overflow 13fd31fc0+64 of device mask ffffffff usb 4-3: device descriptor read/64, error -32 usb 4-3: new high speed USB device using ehci_hcd and address 5 nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff usb 4-3: device not accepting address 5, error -32 usb 4-3: new high speed USB device using ehci_hcd and address 6 nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff usb 4-3: device not accepting address 6, error -32 usbcore: registered new driver usbkbd drivers/usb/input/usbkbd.c: :USB HID Boot Protocol keyboard driver usb 1-1: new full speed USB device using uhci_hcd and address 3 nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff nommu_map_single: overflow 13fd31fc0+64 of device mask ffffffff nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff nommu_map_single: overflow 13fd31fc0+64 of device mask ffffffff nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff nommu_map_single: overflow 13fd31fc0+64 of device mask ffffffff usb 1-1: device descriptor read/64, error -110 nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff nommu_map_single: overflow 13fd31fc0+64 of device mask ffffffff nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff nommu_map_single: overflow 13fd31fc0+64 of device mask ffffffff nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff nommu_map_single: overflow 13fd31fc0+64 of device mask ffffffff usb 1-1: device descriptor read/64, error -110 usb 1-1: new full speed USB device using uhci_hcd and address 4 nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff nommu_map_single: overflow 13fd31fc0+64 of device mask ffffffff nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff nommu_map_single: overflow 13fd31fc0+64 of device mask ffffffff nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff nommu_map_single: overflow 13fd31fc0+64 of device mask ffffffff usb 1-1: device descriptor read/64, error -110 nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff nommu_map_single: overflow 13fd31fc0+64 of device mask ffffffff nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff nommu_map_single: overflow 13fd31fc0+64 of device mask ffffffff nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff nommu_map_single: overflow 13fd31fc0+64 of device mask ffffffff usb 1-1: device descriptor read/64, error -110 usb 1-1: new full speed USB device using uhci_hcd and address 5 nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff nommu_map_single: overflow 13f274cc0+8 of device mask ffffffff usb 1-1: device not accepting address 5, error -110 usb 1-1: new full speed USB device using uhci_hcd and address 6 nommu_map_single: overflow 13fc01e80+8 of device mask ffffffff nommu_map_single: overflow 13fc01e80+8 of device mask ffffffff usb 1-1: device not accepting address 6, error -110 usbcore: registered new driver usbserial drivers/usb/serial/usb-serial.c: USB Serial support registered for generic usbcore: registered new driver usbserial_generic drivers/usb/serial/usb-serial.c: USB Serial Driver core Complete dmesg output available here: http://www.clock.co.uk/scratch/dmesg-ned-2006051601.txt
Have same problem with pure 2.6.16 and 2.6.17-rc4
Created attachment 8240 [details] full dmesg from failed system
User error in my case, did not enable IOMMU in kernel config...
Ok, will close, thanks for letting us know.