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List:       linux-usb-users
Subject:    [Linux-usb-users] USB related hang
From:       VOLTZ_stéphane <svoltz () wanadoo ! fr>
Date:       2005-04-28 20:17:10
Message-ID: 42715162.3080202 () wanadoo ! fr
[Download RAW message or body]

        Hello,

        starting from linux kernel 2.6.10-rc2, my laptop is hanging when
the X server tries to open some USB devices. I eventually found that the
hang goes away when I change line 308 in drivers/usb/host/ohci-hub.c
from 'int               can_suspend = hcd->can_wakeup;'
to 'int         can_suspend = 1;'

        With this change, my X server and USB devices work OK. In case 
it can
be usefull, here's dmesg messages related to USB:

ohci_hcd 0000:00:02.0: ALi Corporation USB 1.1 Controller
ohci_hcd 0000:00:02.0: new USB bus registered, assigned bus number 1
ohci_hcd 0000:00:02.0: irq 9, io mem 0xfff70000
ohci_hcd 0000:00:02.0: resetting from state 'reset', control = 0x0
ohci_hcd 0000:00:02.0: OHCI controller state
ohci_hcd 0000:00:02.0: OHCI 1.0, NO legacy support registers
ohci_hcd 0000:00:02.0: control 0x083 HCFS=operational CBSR=3
ohci_hcd 0000:00:02.0: cmdstatus 0x00000 SOC=0
ohci_hcd 0000:00:02.0: intrstatus 0x00000004 SF
ohci_hcd 0000:00:02.0: intrenable 0x8000000a MIE RD WDH
ohci_hcd 0000:00:02.0: fminterval a7782edf
ohci_hcd 0000:00:02.0: hcca frame #0004
ohci_hcd 0000:00:02.0: roothub.a 01000202 POTPGT=1 NPS NDP=2
ohci_hcd 0000:00:02.0: roothub.b 00000000 PPCM=0000 DR=0000
ohci_hcd 0000:00:02.0: roothub.status 00008000 DRWE
ohci_hcd 0000:00:02.0: roothub.portstatus [0] 0x00000100 PPS
ohci_hcd 0000:00:02.0: roothub.portstatus [1] 0x00000100 PPS
usb usb1: default language 0x0409
usb usb1: new device strings: Mfr=3, Product=2, SerialNumber=1
usb usb1: Product: ALi Corporation USB 1.1 Controller
usb usb1: Manufacturer: Linux 2.6.12-rc3 ohci_hcd
usb usb1: SerialNumber: 0000:00:02.0   
usb usb1: hotplug
usb usb1: adding 1-0:1.0 (config #1, interface 0)
hub 1-0:1.0: usb_probe_interface
hub 1-0:1.0: usb_probe_interface - got id
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 2 ports detected
hub 1-0:1.0: standalone hub
hub 1-0:1.0: no power switching (usb 1.0)
hub 1-0:1.0: global over-current protection
hub 1-0:1.0: power on to power good time: 2ms
hub 1-0:1.0: local power source is good
hub 1-0:1.0: no over-current condition exists
hub 1-0:1.0: state 5 ports 2 chg 0000 evt 0000
usb 1-0:1.0: hotplug
ohci_hcd 0000:00:02.0: created debug files
ohci_hcd 0000:00:02.0: suspend root hub
USB Universal Host Controller Interface driver v2.2
ohci_hcd 0000:00:02.0: wakeup
hub 1-0:1.0: state 5 ports 2 chg 0000 evt 0002
ohci_hcd 0000:00:02.0: GetStatus roothub.portstatus [0] = 0x00010301 CSC 
LSDA PP
S CCS
hub 1-0:1.0: port 1, status 0301, change 0001, 1.5 Mb/s
hub 1-0:1.0: debounce: port 1: total 100ms stable 100ms status 0x301
ohci_hcd 0000:00:02.0: GetStatus roothub.portstatus [0] = 0x00100303 
PRSC LSDA P
PS PES CCS
usb 1-1: new low speed USB device using ohci_hcd and address 2
ohci_hcd 0000:00:02.0: GetStatus roothub.portstatus [0] = 0x00100303 
PRSC LSDA P
PS PES CCS
usb 1-1: skipped 1 descriptor after interface
usb 1-1: default language 0x0409
usb 1-1: new device strings: Mfr=0, Product=1, SerialNumber=0
usb 1-1: Product: Acecad USB Tablet
usb 1-1: hotplug
usb 1-1: adding 1-1:1.0 (config #1, interface 0)
usb 1-1:1.0: hotplug
usb_acecad 1-1:1.0: usb_probe_interface
usb_acecad 1-1:1.0: usb_probe_interface - got id


Regards,
        Stef






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