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SOLVED: AC86U reboot loop after plugging external HDD

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WisherBG

New Around Here
Hi All,
I have the following problem on latest Asus auto-updated firmware (30043784585) and on latest Merlin's (378.54_2)

When I plug in my WD MyPassport 2TB external HDD the router goes into a reboot loop.
If I unplug the disk - it works fine again.
HDD is formatted in 2 partitions - 1TB Mac partition and 1TB ext4 partition

The logs which I managed to collect just after plugging the drive in on Merlin's firmware look like that:

Code:
Jul  7 21:09:14 kernel: usb 1-1: new SuperSpeed USB device using xhci_hcd and address 2
Jul  7 21:09:15 kernel: xhci_hcd 0000:00:0c.0: WARN: short transfer on control ep
Jul  7 21:09:15 kernel: xhci_hcd 0000:00:0c.0: WARN: short transfer on control ep
Jul  7 21:09:15 kernel: xhci_hcd 0000:00:0c.0: WARN: short transfer on control ep
Jul  7 21:09:15 kernel: xhci_hcd 0000:00:0c.0: WARN: short transfer on control ep
Jul  7 21:09:15 kernel: xhci_hcd 0000:00:0c.0: disable burst on ep 1
Jul  7 21:09:15 kernel: xhci_hcd 0000:00:0c.0: WARN no SS endpoint bMaxBurst
Jul  7 21:09:15 kernel: xhci_hcd 0000:00:0c.0: disable burst on ep 2
Jul  7 21:09:15 kernel: xhci_hcd 0000:00:0c.0: WARN no SS endpoint bMaxBurst
Jul  7 21:09:15 kernel: xhci_hcd 0000:00:0c.0: WARN: short transfer on control ep
Jul  7 21:09:15 kernel: xhci_hcd 0000:00:0c.0: WARN: short transfer on control ep
Jul  7 21:09:15 kernel: scsi0 : usb-storage 1-1:1.0
Jul  7 21:09:16 kernel: scsi 0:0:0:0: Direct-Access     WD       Elements 10B8    1007 PQ: 0 ANSI: 6
Jul  7 21:09:16 kernel: sd 0:0:0:0: Attached scsi generic sg0 type 0
Jul  7 21:09:16 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:16 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:16 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:16 kernel: sd 0:0:0:0: [sda] Spinning up disk...
Jul  7 21:09:16 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:17 kernel: .
Jul  7 21:09:17 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:17 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:17 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:18 kernel: .
Jul  7 21:09:18 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:18 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:18 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:19 kernel: .
Jul  7 21:09:19 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:19 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:19 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:20 kernel: .
Jul  7 21:09:20 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:20 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:20 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:21 kernel: .
Jul  7 21:09:21 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:21 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:21 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:22 kernel: .
Jul  7 21:09:22 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:22 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:22 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:23 kernel: .ready
Jul  7 21:09:23 kernel: sd 0:0:0:0: [sda] 3906963456 512-byte logical blocks: (2.00 TB/1.81 TiB)
Jul  7 21:09:23 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:23 kernel: sd 0:0:0:0: [sda] Write Protect is off
Jul  7 21:09:23 kernel: sd 0:0:0:0: [sda] Assuming drive cache: write through
Jul  7 21:09:23 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:23 kernel: sd 0:0:0:0: [sda] Assuming drive cache: write through
Jul  7 21:09:23 kernel:  sda: sda1 sda2 sda3
Jul  7 21:09:23 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:23 kernel: sd 0:0:0:0: [sda] Assuming drive cache: write through
Jul  7 21:09:23 kernel: sd 0:0:0:0: [sda] Attached SCSI disk
Jul  7 21:09:23 rc_service: asus_sd 854:notify_rc restart_xhcimode 2
Jul  7 21:09:25 iTunes: daemon is stopped
Jul  7 21:09:25 FTP Server: daemon is stopped
Jul  7 21:09:25 Samba Server: smb daemon is stopped
Jul  7 21:09:26 kernel: gro disabled
Jul  7 21:09:26 Timemachine: daemon is stopped
Jul  7 21:09:26 kernel: xhci_hcd 0000:00:0c.0: remove, state 1
Jul  7 21:09:26 kernel: usb usb1: USB disconnect, address 1
Jul  7 21:09:26 kernel: usb 1-1: USB disconnect, address 2
Jul  7 21:09:26 kernel: xhci_hcd 0000:00:0c.0: USB bus 1 deregistered
Jul  7 21:09:26 kernel: ehci_hcd 0000:00:0b.1: remove, state 1
Jul  7 21:09:26 kernel: usb usb2: USB disconnect, address 1
Jul  7 21:09:26 kernel: ehci_hcd 0000:00:0b.1: USB bus 2 deregistered
Jul  7 21:09:26 kernel: ohci_hcd 0000:00:0b.0: remove, state 1
Jul  7 21:09:26 kernel: usb usb3: USB disconnect, address 1
Jul  7 21:09:26 kernel: ohci_hcd 0000:00:0b.0: USB bus 3 deregistered
Jul  7 21:09:27 rc_service: hotplug 913:notify_rc restart_nasapps
Jul  7 21:09:27 rc_service: waitting "restart_xhcimode 2" via  ...
Jul  7 21:09:27 kernel: xhci_hcd 0000:00:0c.0: xHCI Host Controller
Jul  7 21:09:27 kernel: xhci_hcd 0000:00:0c.0: new USB bus registered, assigned bus number 1
Jul  7 21:09:27 kernel: xhci_hcd 0000:00:0c.0: irq 112, io mem 0x18023000
Jul  7 21:09:27 kernel: xhci_hcd 0000:00:0c.0: Failed to enable MSI-X
Jul  7 21:09:27 kernel: xhci_hcd 0000:00:0c.0: failed to allocate MSI entry
Jul  7 21:09:27 kernel: usb usb1: No SuperSpeed endpoint companion for config 1  interface 0 altsetting 0 ep 129: using minimum values
Jul  7 21:09:27 kernel: hub 1-0:1.0: USB hub found
Jul  7 21:09:27 kernel: hub 1-0:1.0: 1 port detected
Jul  7 21:09:27 kernel: [xhci-hub] usb2mode:[2]
Jul  7 21:09:27 kernel: ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
Jul  7 21:09:27 kernel: ehci_hcd 0000:00:0b.1: EHCI Host Controller
Jul  7 21:09:27 kernel: ehci_hcd 0000:00:0b.1: new USB bus registered, assigned bus number 2
Jul  7 21:09:27 kernel: ehci_hcd 0000:00:0b.1: irq 111, io mem 0x18021000
Jul  7 21:09:27 kernel: ehci_hcd 0000:00:0b.1: USB 0.0 started, EHCI 1.00
Jul  7 21:09:27 kernel: hub 2-0:1.0: USB hub found
Jul  7 21:09:27 kernel: hub 2-0:1.0: 2 ports detected
Jul  7 21:09:27 kernel: ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
Jul  7 21:09:27 kernel: ohci_hcd 0000:00:0b.0: OHCI Host Controller
Jul  7 21:09:27 kernel: ohci_hcd 0000:00:0b.0: new USB bus registered, assigned bus number 3
Jul  7 21:09:27 kernel: ohci_hcd 0000:00:0b.0: irq 111, io mem 0x18022000
Jul  7 21:09:28 kernel: hub 3-0:1.0: USB hub found
Jul  7 21:09:28 kernel: hub 3-0:1.0: 2 ports detected
Jul  7 21:09:28 rc_service: hotplug 915:notify_rc restart_nasapps
Jul  7 21:09:28 rc_service: waitting "restart_nasapps" via hotplug ...
Jul  7 21:09:28 kernel: usb 2-1: new high speed USB device using ehci_hcd and address 2
Jul  7 21:09:28 kernel: scsi1 : usb-storage 2-1:1.0
Jul  7 21:09:29 kernel: scsi 1:0:0:0: Direct-Access     WD       Elements 10B8    1007 PQ: 0 ANSI: 6
Jul  7 21:09:29 kernel: sd 1:0:0:0: Attached scsi generic sg0 type 0
Jul  7 21:09:29 kernel: sd 1:0:0:0: [sda] 3906963456 512-byte logical blocks: (2.00 TB/1.81 TiB)
Jul  7 21:09:29 kernel: sd 1:0:0:0: [sda] Write Protect is off
Jul  7 21:09:29 kernel: sd 1:0:0:0: [sda] Assuming drive cache: write through
Jul  7 21:09:29 kernel: sd 1:0:0:0: [sda] Assuming drive cache: write through
Jul  7 21:09:29 kernel:  sda: sda1 sda2 sda3
Jul  7 21:09:29 kernel: sd 1:0:0:0: [sda] Assuming drive cache: write through
Jul  7 21:09:29 kernel: sd 1:0:0:0: [sda] Attached SCSI disk
Jul  7 21:09:30 iTunes: daemon is stopped
Jul  7 21:09:30 FTP Server: daemon is stopped
Jul  7 21:09:30 Samba Server: smb daemon is stopped
Jul  7 21:09:30 kernel: gro disabled
Jul  7 21:09:30 Timemachine: daemon is stopped
Jul  7 21:09:30 kernel: gro enabled with interval 2
Jul  7 21:09:32 Samba Server: daemon is started
Jul  7 21:09:33 rc_service: hotplug 914:notify_rc restart_nasapps
Jul  7 21:09:33 rc_service: waitting "restart_nasapps" via hotplug ...
Jul  7 21:09:34 iTunes: daemon is stopped
Jul  7 21:09:34 FTP Server: daemon is stopped

After that the rebooting loop starts and I can see the network for only brief seconds and then it goes away again.
I have tried downgrading the firmware to stock 30043783873 which used to work fine but suddenly started having the same problem.

Please help!
If you need more information - I will gladly supply given that I know how to collect it.

Best Regards,
Wisher
 
Same thing happens with latest firmware from the ASUS site - 3.0.0.4.378_6975 although it says it updated an issue with connecting to USB hubs.
This is the log from it:
Code:
Jul  7 21:09:14 kernel: usb 1-1: new SuperSpeed USB device using xhci_hcd and address 2
Jul  7 21:09:15 kernel: xhci_hcd 0000:00:0c.0: WARN: short transfer on control ep
Jul  7 21:09:15 kernel: xhci_hcd 0000:00:0c.0: WARN: short transfer on control ep
Jul  7 21:09:15 kernel: xhci_hcd 0000:00:0c.0: WARN: short transfer on control ep
Jul  7 21:09:15 kernel: xhci_hcd 0000:00:0c.0: WARN: short transfer on control ep
Jul  7 21:09:15 kernel: xhci_hcd 0000:00:0c.0: disable burst on ep 1
Jul  7 21:09:15 kernel: xhci_hcd 0000:00:0c.0: WARN no SS endpoint bMaxBurst
Jul  7 21:09:15 kernel: xhci_hcd 0000:00:0c.0: disable burst on ep 2
Jul  7 21:09:15 kernel: xhci_hcd 0000:00:0c.0: WARN no SS endpoint bMaxBurst
Jul  7 21:09:15 kernel: xhci_hcd 0000:00:0c.0: WARN: short transfer on control ep
Jul  7 21:09:15 kernel: xhci_hcd 0000:00:0c.0: WARN: short transfer on control ep
Jul  7 21:09:15 kernel: scsi0 : usb-storage 1-1:1.0
Jul  7 21:09:16 kernel: scsi 0:0:0:0: Direct-Access     WD       Elements 10B8    1007 PQ: 0 ANSI: 6
Jul  7 21:09:16 kernel: sd 0:0:0:0: Attached scsi generic sg0 type 0
Jul  7 21:09:16 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:16 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:16 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:16 kernel: sd 0:0:0:0: [sda] Spinning up disk...
Jul  7 21:09:16 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:17 kernel: .
Jul  7 21:09:17 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:17 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:17 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:18 kernel: .
Jul  7 21:09:18 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:18 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:18 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:19 kernel: .
Jul  7 21:09:19 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:19 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:19 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:20 kernel: .
Jul  7 21:09:20 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:20 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:20 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:21 kernel: .
Jul  7 21:09:21 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:21 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:21 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:22 kernel: .
Jul  7 21:09:22 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:22 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:22 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:23 kernel: .ready
Jul  7 21:09:23 kernel: sd 0:0:0:0: [sda] 3906963456 512-byte logical blocks: (2.00 TB/1.81 TiB)
Jul  7 21:09:23 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:23 kernel: sd 0:0:0:0: [sda] Write Protect is off
Jul  7 21:09:23 kernel: sd 0:0:0:0: [sda] Assuming drive cache: write through
Jul  7 21:09:23 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:23 kernel: sd 0:0:0:0: [sda] Assuming drive cache: write through
Jul  7 21:09:23 kernel:  sda: sda1 sda2 sda3
Jul  7 21:09:23 kernel: xhci_hcd 0000:00:0c.0: WARN: Stalled endpoint
Jul  7 21:09:23 kernel: sd 0:0:0:0: [sda] Assuming drive cache: write through
Jul  7 21:09:23 kernel: sd 0:0:0:0: [sda] Attached SCSI disk
Jul  7 21:09:23 rc_service: asus_sd 854:notify_rc restart_xhcimode 2
Jul  7 21:09:25 iTunes: daemon is stopped
Jul  7 21:09:25 FTP Server: daemon is stopped
Jul  7 21:09:25 Samba Server: smb daemon is stopped
Jul  7 21:09:26 kernel: gro disabled
Jul  7 21:09:26 Timemachine: daemon is stopped
Jul  7 21:09:26 kernel: xhci_hcd 0000:00:0c.0: remove, state 1
Jul  7 21:09:26 kernel: usb usb1: USB disconnect, address 1
Jul  7 21:09:26 kernel: usb 1-1: USB disconnect, address 2
Jul  7 21:09:26 kernel: xhci_hcd 0000:00:0c.0: USB bus 1 deregistered
Jul  7 21:09:26 kernel: ehci_hcd 0000:00:0b.1: remove, state 1
Jul  7 21:09:26 kernel: usb usb2: USB disconnect, address 1
Jul  7 21:09:26 kernel: ehci_hcd 0000:00:0b.1: USB bus 2 deregistered
Jul  7 21:09:26 kernel: ohci_hcd 0000:00:0b.0: remove, state 1
Jul  7 21:09:26 kernel: usb usb3: USB disconnect, address 1
Jul  7 21:09:26 kernel: ohci_hcd 0000:00:0b.0: USB bus 3 deregistered
Jul  7 21:09:27 rc_service: hotplug 913:notify_rc restart_nasapps
Jul  7 21:09:27 rc_service: waitting "restart_xhcimode 2" via  ...
Jul  7 21:09:27 kernel: xhci_hcd 0000:00:0c.0: xHCI Host Controller
Jul  7 21:09:27 kernel: xhci_hcd 0000:00:0c.0: new USB bus registered, assigned bus number 1
Jul  7 21:09:27 kernel: xhci_hcd 0000:00:0c.0: irq 112, io mem 0x18023000
Jul  7 21:09:27 kernel: xhci_hcd 0000:00:0c.0: Failed to enable MSI-X
Jul  7 21:09:27 kernel: xhci_hcd 0000:00:0c.0: failed to allocate MSI entry
Jul  7 21:09:27 kernel: usb usb1: No SuperSpeed endpoint companion for config 1  interface 0 altsetting 0 ep 129: using minimum values
Jul  7 21:09:27 kernel: hub 1-0:1.0: USB hub found
Jul  7 21:09:27 kernel: hub 1-0:1.0: 1 port detected
Jul  7 21:09:27 kernel: [xhci-hub] usb2mode:[2]
Jul  7 21:09:27 kernel: ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
Jul  7 21:09:27 kernel: ehci_hcd 0000:00:0b.1: EHCI Host Controller
Jul  7 21:09:27 kernel: ehci_hcd 0000:00:0b.1: new USB bus registered, assigned bus number 2
Jul  7 21:09:27 kernel: ehci_hcd 0000:00:0b.1: irq 111, io mem 0x18021000
Jul  7 21:09:27 kernel: ehci_hcd 0000:00:0b.1: USB 0.0 started, EHCI 1.00
Jul  7 21:09:27 kernel: hub 2-0:1.0: USB hub found
Jul  7 21:09:27 kernel: hub 2-0:1.0: 2 ports detected
Jul  7 21:09:27 kernel: ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
Jul  7 21:09:27 kernel: ohci_hcd 0000:00:0b.0: OHCI Host Controller
Jul  7 21:09:27 kernel: ohci_hcd 0000:00:0b.0: new USB bus registered, assigned bus number 3
Jul  7 21:09:27 kernel: ohci_hcd 0000:00:0b.0: irq 111, io mem 0x18022000
Jul  7 21:09:28 kernel: hub 3-0:1.0: USB hub found
Jul  7 21:09:28 kernel: hub 3-0:1.0: 2 ports detected
Jul  7 21:09:28 rc_service: hotplug 915:notify_rc restart_nasapps
Jul  7 21:09:28 rc_service: waitting "restart_nasapps" via hotplug ...
Jul  7 21:09:28 kernel: usb 2-1: new high speed USB device using ehci_hcd and address 2
Jul  7 21:09:28 kernel: scsi1 : usb-storage 2-1:1.0
Jul  7 21:09:29 kernel: scsi 1:0:0:0: Direct-Access     WD       Elements 10B8    1007 PQ: 0 ANSI: 6
Jul  7 21:09:29 kernel: sd 1:0:0:0: Attached scsi generic sg0 type 0
Jul  7 21:09:29 kernel: sd 1:0:0:0: [sda] 3906963456 512-byte logical blocks: (2.00 TB/1.81 TiB)
Jul  7 21:09:29 kernel: sd 1:0:0:0: [sda] Write Protect is off
Jul  7 21:09:29 kernel: sd 1:0:0:0: [sda] Assuming drive cache: write through
Jul  7 21:09:29 kernel: sd 1:0:0:0: [sda] Assuming drive cache: write through
Jul  7 21:09:29 kernel:  sda: sda1 sda2 sda3
Jul  7 21:09:29 kernel: sd 1:0:0:0: [sda] Assuming drive cache: write through
Jul  7 21:09:29 kernel: sd 1:0:0:0: [sda] Attached SCSI disk
Jul  7 21:09:30 iTunes: daemon is stopped
Jul  7 21:09:30 FTP Server: daemon is stopped
Jul  7 21:09:30 Samba Server: smb daemon is stopped
Jul  7 21:09:30 kernel: gro disabled
Jul  7 21:09:30 Timemachine: daemon is stopped
Jul  7 21:09:30 kernel: gro enabled with interval 2
Jul  7 21:09:32 Samba Server: daemon is started
Jul  7 21:09:33 rc_service: hotplug 914:notify_rc restart_nasapps
Jul  7 21:09:33 rc_service: waitting "restart_nasapps" via hotplug ...
Jul  7 21:09:34 iTunes: daemon is stopped
Jul  7 21:09:34 FTP Server: daemon is stopped
 
Issue was Solved by re-formatting the Mac partition of the external drive. Apparently it was broken.
After that - the issue does not exist anymore.

Cheers to all!
 

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