I've a similar problem but on my computer its just the other way round. With 2.6.15-23-386 its working on my VIA EPIA board and with 2.6.15-26-386 it stopped. So I decided to reopen this bug.
Here are some log entries with the 2.6.15-26-386 kernel: Jul 28 00:06:53 jumpgate kernel: [17179878.780000] usb 1-2: new high speed USB device using ehci_hcd and address 2 Jul 28 00:06:54 jumpgate kernel: [17179879.780000] ehci_hcd 0000:00:10.3: Unlink after no-IRQ? Controller is probably using the wrong IRQ. Jul 28 00:07:05 jumpgate kernel: [17179890.324000] usb 1-2: device not accepting address 2, error -110 Jul 28 00:07:05 jumpgate kernel: [17179890.448000] usb 1-2: new high speed USB device using ehci_hcd and address 3 Jul 28 00:07:16 jumpgate kernel: [17179901.992000] usb 1-2: device not accepting address 3, error -110 Jul 28 00:07:17 jumpgate kernel: [17179902.108000] usb 1-2: new high speed USB device using ehci_hcd and address 4 Jul 28 00:07:27 jumpgate kernel: [17179912.532000] usb 1-2: device not accepting address 4, error -110 Jul 28 00:07:27 jumpgate kernel: [17179912.648000] usb 1-2: new high speed USB device using ehci_hcd and address 5 Jul 28 00:07:38 jumpgate kernel: [17179923.072000] usb 1-2: device not accepting address 5, error -110 If I unload the ehci_hcd modul the dvd writer is accessable at once Jul 28 16:08:22 jumpgate kernel: [17237138.096000] ehci_hcd 0000:00:10.3: remove, state 1 Jul 28 16:08:22 jumpgate kernel: [17237138.096000] usb usb1: USB disconnect, address 1 Jul 28 16:08:22 jumpgate kernel: [17237138.100000] ehci_hcd 0000:00:10.3: USB bus 1 deregistered Jul 28 16:08:22 jumpgate kernel: [17237138.100000] ACPI: PCI interrupt for device 0000:00:10.3 disabled Jul 28 16:08:22 jumpgate kernel: [17237138.340000] usb 2-2: new full speed USB device using uhci_hcd and address 2 Jul 28 16:08:23 jumpgate kernel: [17237138.664000] SCSI subsystem initialized Jul 28 16:08:23 jumpgate kernel: [17237138.692000] Initializing USB Mass Storage driver... Jul 28 16:08:23 jumpgate kernel: [17237138.696000] scsi0 : SCSI emulation for USB Mass Storage devices Jul 28 16:08:23 jumpgate kernel: [17237138.696000] usb-storage: device found at 2 Jul 28 16:08:23 jumpgate kernel: [17237138.696000] usb-storage: waiting for device to settle before scanning Jul 28 16:08:23 jumpgate kernel: [17237138.696000] usbcore: registered new driver usb-storage Jul 28 16:08:23 jumpgate kernel: [17237138.696000] USB Mass Storage support registered. Jul 28 16:08:28 jumpgate kernel: [17237143.732000] Vendor: HL-DT-ST Model: DVDRRW GSA-2164D Rev: 1.01 Jul 28 16:08:28 jumpgate kernel: [17237143.732000] Type: CD-ROM ANSI SCSI revision: 00 Jul 28 16:08:28 jumpgate kernel: [17237143.744000] usb-storage: device scan complete Jul 28 16:08:28 jumpgate kernel: [17237143.832000] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray Jul 28 16:08:28 jumpgate kernel: [17237143.836000] Uniform CD-ROM driver Revision: 3.20 Jul 28 16:08:28 jumpgate kernel: [17237143.836000] sr 0:0:0:0: Attached scsi CD-ROM sr0 Jul 28 16:08:28 jumpgate kernel: [17237143.872000] sr 0:0:0:0: Attached scsi generic sg0 type 5 on 2.6.15-23-386 it looks like that: Jul 28 17:13:45 jumpgate kernel: [4294678.112000] usb 4-2: new high speed USB device using ehci_hcd and address 2 Jul 28 17:13:45 jumpgate kernel: [4294678.202000] Attempting manual resume Jul 28 17:13:45 jumpgate kernel: [4294678.288000] SCSI subsystem initialized Jul 28 17:13:45 jumpgate kernel: [4294678.295000] Initializing USB Mass Storage driver... Jul 28 17:13:45 jumpgate kernel: [4294678.296000] scsi0 : SCSI emulation for USB Mass Storage devices Jul 28 17:13:45 jumpgate kernel: [4294678.297000] usb-storage: device found at 2 Jul 28 17:13:45 jumpgate kernel: [4294678.297000] usb-storage: waiting for device to settle before scanning Jul 28 17:13:45 jumpgate kernel: [4294678.297000] usbcore: registered new driver usb-storage Jul 28 17:13:45 jumpgate kernel: [4294678.297000] USB Mass Storage support registered. Jul 28 17:13:45 jumpgate kernel: [4294678.307000] EXT3-fs: mounted filesystem with ordered data mode. Jul 28 17:13:45 jumpgate kernel: [4294678.340000] kjournald starting. Commit interval 5 seconds Jul 28 17:13:45 jumpgate kernel: [4294683.333000] Vendor: HL-DT-ST Model: DVDRRW GSA-2164D Rev: 1.01 Jul 28 17:13:45 jumpgate kernel: [4294683.333000] Type: CD-ROM ANSI SCSI revision: 00 Jul 28 17:13:45 jumpgate kernel: [4294683.333000] usb-storage: device scan complete Jul 28 17:13:45 jumpgate kernel: [4294684.685000] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray Jul 28 17:13:45 jumpgate kernel: [4294684.685000] Uniform CD-ROM driver Revision: 3.20 Jul 28 17:13:45 jumpgate kernel: [4294684.685000] sr 0:0:0:0: Attached scsi CD-ROM sr0 Jul 28 17:13:45 jumpgate kernel: [4294684.728000] sr 0:0:0:0: Attached scsi generic sg0 type 5 -- EHCI Configuration Errors Cause USB Errors (Mouse, etc) https://launchpad.net/bugs/49367 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs