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Oliver Neukum wrote:
> Am Mittwoch, 2. Mai 2012, 11:57:26 schrieb Martin Mokrejs:
>> Hi,
>> I am trying to setup a remote serial console on my Dell Vostro 3550 laptop.
>> I have some USB to serial dongle which has Prolific 2303 chipset, and works.
>> I have statically in my kernel:
>>
>> USB_SERIAL=y
>> USB_SERIAL_CONSOLE=y
>> CONFIG_USB_SERIAL_PL2303=y
>>
>> The problem is that when I attach the dongle to USB3.0 controller linux crashes.
>> It does not happen if I attach it to EHCI controller (like shown in lsub output at
>> the end of this email).
>
> Hi,
>
> interesting. There's no good reason scheduling a work should fail
> depending on the hardware at this point. What does /proc/interrupts say?
When the dongle is connected via the EHCI controller, it says:
# cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3
0: 25 0 0 0 IR-IO-APIC-edge timer
1: 682 0 0 0 IR-IO-APIC-edge i8042
8: 50 0 0 0 IR-IO-APIC-edge rtc0
9: 0 0 0 0 IR-IO-APIC-fasteoi acpi
12: 241 0 0 0 IR-IO-APIC-edge i8042
16: 42804 0 0 0 IR-IO-APIC-fasteoi ehci_hcd:usb1
23: 367 0 0 0 IR-IO-APIC-fasteoi ehci_hcd:usb2
40: 0 0 0 0 DMAR_MSI-edge dmar0
41: 0 0 0 0 DMAR_MSI-edge dmar1
42: 0 0 0 0 IR-PCI-MSI-edge pciehp
43: 192073 0 0 0 IR-PCI-MSI-edge i915
44: 19744 0 0 0 IR-PCI-MSI-edge ahci
45: 21862 0 0 0 IR-PCI-MSI-edge eth0
46: 0 0 0 0 IR-PCI-MSI-edge xhci_hcd
47: 0 0 0 0 IR-PCI-MSI-edge xhci_hcd
48: 0 0 0 0 IR-PCI-MSI-edge xhci_hcd
49: 0 0 0 0 IR-PCI-MSI-edge xhci_hcd
50: 0 0 0 0 IR-PCI-MSI-edge xhci_hcd
51: 14 0 0 0 IR-PCI-MSI-edge mei
52: 889 0 0 0 IR-PCI-MSI-edge snd_hda_intel
53: 6 0 0 0 IR-PCI-MSI-edge iwlwifi
NMI: 104 65 62 87 Non-maskable interrupts
LOC: 43763 22386 26368 21843 Local timer interrupts
SPU: 0 0 0 0 Spurious interrupts
PMI: 104 65 62 87 Performance monitoring interrupts
IWI: 0 0 0 0 IRQ work interrupts
RTR: 0 0 0 0 APIC ICR read retries
RES: 9763 5079 863 510 Rescheduling interrupts
CAL: 106 136 130 116 Function call interrupts
TLB: 1246 770 2069 2017 TLB shootdowns
TRM: 0 0 0 0 Thermal event interrupts
THR: 0 0 0 0 Threshold APIC interrupts
MCE: 0 0 0 0 Machine check exceptions
MCP: 13 13 13 13 Machine check polls
ERR: 0
MIS: 0
#
If you wanted me to reboot without the dongle inserted and plug it into the USB3.0
socket after bootup and provide lsusb -vvxx and /proc/interrupts, please let me know. ;-)
Martin
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