Alan Stern wrote:
On Wed, 22 Mar 2006, Thomas Thanner wrote:
UHCI driver is compiled directly into kernel. EHCI driver is modular.
When mouse is moved during boot, boot process stops when the UHCI driver gets
initialized.
We will test with a 2.6.15 kernel asap, a 2.6.16 has to be prepared for our
system first, so it will take some time before we can do the test.
We have new findings, too. Now it looks like the problem is based on
communication between EHCI and UHCI.
When both are modules, everything works fine.
When both are compiled into kernel, everything works fine.
When UHCI is compiled in and EHCI is module, we have the error.
But above you said that everything stops when the UHCI driver gets
initialized. If it is built into the kernel, then it will be initialized
long before the EHCI driver module can be loaded. So this cannot be a
communications problem between the two drivers.
If you still have the problem in later kernels, you should turn in
CONFIG_USB_DEBUG in the configuration and post the kernel log.
Alan Stern
Sorry, I was writing a bit missunderstandingable. When I sait "initializes" I
actually meant the print-outs of the driver during kernel initialization. They
look like:
...
ICH5: chipset revision 2
ICH5: not 100% native mode: will probe irq later
ide0: BM-DMA at 0x1460-0x1467, BIOS settings: hda:DMA, hdb:pio
ide1: BM-DMA at 0x1468-0x146f, BIOS settings: hdc:pio, hdd:pio
hda: MATSHITADVD-RAM SW-9574S, ATAPI CD/DVD-ROM drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
hda: ATAPI 39X DVD-ROM DVD-R-RAM CD-R/RW drive, 2048kB Cache, UDMA(33)
Uniform CD-ROM driver Revision: 3.20
USB Universal Host Controller Interface driver v2.2
ACPI: PCI interrupt 0000:00:1d.0[A] -> GSI 16 (level, low) -> IRQ 16
uhci_hcd 0000:00:1d.0: Intel Corp. 6300ESB USB Universal Host Controller
Then the computers stands and take no input from keyboard any longer. Since
the last message was from UHCI I wrote "during UHCI initialization".
And this all happens only, if UHCI compiled in *and* EHCI is module *and*
mouse is moved during startup.
Hopefully this clarifies things a little bit. Sorry again for the unclear
statements in my first post.
Thomas
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