Kenneth D. Merry writes:
> > Wow, I didn't actually expect my config would make things work
> > differenty on your box. I'm very interested in whatever you
> > turn up.
>
> The answer is...the USB code.
>
> [ Nick and Joe CCed ]
>
> If I comment out the following lines in my standard config for this
> machine, SMP works:
>
> # USB support
> device uhci # UHCI PCI->USB interface
> device ohci # OHCI PCI->USB interface
> device usb # USB Bus (required)
> #device udbp # USB Double Bulk Pipe devices
<...>
To add another datapoint, the USB code will prevent some alphas from
rebooting cleanly in -stable. With USB compiled in, the machine will
not get any ATA interrupts after a warm reboot. This change happened
somewhere between 4.4 and 4.5.
It doesn't seem to matter if the machine actually has USB enabled or
not. Eg, it happens on a UP1000 which has USB hardware, but has it
disabled in the firmware:
chip0@pci0:0:0: class=0x060000 card=0x00000000 chip=0x70061022 rev=0x25 hdr=0x00
vendor = 'Advanced Micro Devices (AMD)'
device = 'AMD-751 Processor-to-PCI Bridge / Memory Ctrlr'
class = bridge
subclass = HOST-PCI
pcib1@pci0:1:0: class=0x060400 card=0x00000000 chip=0x70071022 rev=0x01 hdr=0x01
vendor = 'Advanced Micro Devices (AMD)'
device = 'AMD-751 AGP and PCI-to-PCI Bridge (1x/2x AGP)'
class = bridge
subclass = PCI-PCI
isab0@pci0:7:0: class=0x060100 card=0x00000000 chip=0x153310b9 rev=0xc3 hdr=0x00
vendor = 'Acer Labs Incorporated (ALi)'
device = 'ALI M1533 Aladdin IV ISA Bridge'
class = bridge
subclass = PCI-ISA
sym0@pci0:8:0: class=0x010000 card=0x00000000 chip=0x000f1000 rev=0x04 hdr=0x00
vendor = 'Symbios Logic (NCR) (LSI Logic)'
device = '53C875, 53C876 Ultra-Wide SCSI (53C876 is dual-channel)'
class = mass storage
subclass = SCSI
rp0@pci0:10:0: class=0x078000 card=0x00000000 chip=0x000511fe rev=0x04 hdr=0x00
vendor = 'Comtrol Corp'
device = 'RocketPort 8-port'
class = simple comms
xl0@pci0:11:0: class=0x020000 card=0x905510b7 chip=0x905510b7 rev=0x64 hdr=0x00
vendor = '3COM Corp, Networking Division'
device = '3C905B-TX Fast Etherlink 10/100 PCI TX NIC'
class = network
subclass = ethernet
atapci0@pci0:16:0: class=0x0101fa card=0x00000000 chip=0x522910b9 rev=0xc1
hdr=0x00
vendor = 'Acer Labs Incorporated (ALi)'
device = 'M1543 Southbridge EIDE Controller'
class = mass storage
subclass = ATA
chip1@pci0:17:0: class=0x000000 card=0x00000000 chip=0x710110b9 rev=0x00
hdr=0x00
vendor = 'Acer Labs Incorporated (ALi)'
device = 'ALI M7101 Power Management Controller'
class = old
subclass = non-VGA display device
none0@pci2:5:0: class=0x030000 card=0x0a351048 chip=0x3d07104c rev=0x11 hdr=0x00
vendor = 'Texas Instruments (TI)'
device = 'TVP4020 AGP Permedia 2'
class = display
subclass = VGA
Cheers,
Drew
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