[Pkg-utopia-maintainers] Bug#760142: systemd: Assertions from systemd-logind on powerpc during login, with continuing loop

[Simon McVittie]

Chris, your Debian root filesystem appears to be on a USB-attached disk
(device ID 067b:2507, which according to
<https://bbs.archlinux.org/viewtopic.php?id=58737> seems to be a
"Prolific Technology, Inc. PL2507 Hi-speed USB to IDE bridge
controller"). Please confirm whether this is the case? (Relevant logs
below.)

This is something that *should* work, but it's an unusual enough
configuration that it would have been helpful to mention it, and if (as
I suspect) there are timeout issues here, USB is probably going to hurt
performance enough to matter - it looks as though you're not just on a
system with a slow CPU, you're also on a system with a slow connection
to its disk.

Further, it looks as though your USB disk is connected at "full speed"
rather than at "high speed". That sounds as though it ought to be a good
thing, but it isn't: confusingly, the USB Implementers Forum defines
"full speed" to be the full speed of USB 1 (12 Mbit/s), whereas "high
speed" is the enhanced signalling rate from USB 2 (480 Mbit/s). A disk
on a 12 Mbit/s bus is never going to be very fast. If this machine has
USB 2, check that you are not using a USB 1 hub to connect the disk. If
it does not, consider adding USB 2 via a PCI or Cardbus expansion card,
or using an internal disk or Firewire instead.

Thanks,
    S

Aug 31 09:07:57 debian kernel: usb 1-1: new full-speed USB device number
2 using ohci-pci
Aug 31 09:07:57 debian kernel: usb 1-1: New USB device found,
idVendor=067b, idProduct=2507
Aug 31 09:07:57 debian kernel: usb 1-1: New USB device strings: Mfr=1,
Product=2, SerialNumber=3
Aug 31 09:07:57 debian kernel: usb 1-1: Product: Mass Storage Device
Aug 31 09:07:57 debian kernel: usb 1-1: Manufacturer: Prolific
Technology Inc.
Aug 31 09:07:57 debian kernel: usb 1-1: SerialNumber: 00
Aug 31 09:07:57 debian kernel: usb-storage 1-1:1.0: USB Mass Storage
device detected
Aug 31 09:07:57 debian kernel: usb-storage 1-1:1.0: Quirks match for vid
067b pid 2507: 10
Aug 31 09:07:57 debian kernel: scsi3 : usb-storage 1-1:1.0
...
Aug 31 09:07:57 debian kernel: scsi 3:0:0:0: Direct-Access     IC25N060
ATMR04-0         MO3O PQ: 0 ANSI: 0
...
Aug 31 09:07:57 debian kernel: sd 3:0:0:0: [sdb] 117210239 512-byte
logical blocks: (60.0 GB/55.8 GiB)
...
Aug 31 09:07:57 debian kernel:  sdb: [mac] sdb1 sdb2 sdb3 sdb4 sdb5 sdb6
sdb7 sdb8 sdb9 sdb10 sdb11 sdb12 sdb13 sdb14
...
Aug 31 09:08:08 debian systemd[1]: Starting Remount Root and Kernel File
Systems...
Aug 31 09:08:08 debian systemd[1]: Starting Sound Card.
Aug 31 09:08:08 debian systemd[1]: Reached target Sound Card.
Aug 31 09:08:08 debian kernel: EXT4-fs (sdb12): re-mounted. Opts:
errors=remount-ro
Aug 31 09:08:09 debian systemd[1]: Started Remount Root and Kernel File
Systems.