http://bugzilla.kernel.org/show_bug.cgi?id=8572
[EMAIL PROTECTED] changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |CLOSED
Component|Config-Interrupts |BIOS
Resolution| |CODE_FIX
Summary|uhci_hcd:usb2 slows to |uhci_hcd:usb2 slows to
|131KB/s from 846KB/s in |131KB/s from 846KB/s in MPS
|legacy IOAPIC mode - Dell |IOAPIC mode - Dell OptiPlex
|OptiPlex GX240 |GX240
------- Comment #15 from [EMAIL PROTECTED] 2007-07-25 20:12 -------
Thanks for testing.
The remaining problem on this machine is that the front-USB
controller has a bad entry in the BIOS MPS table.
Options:
1. run in ACPI mode -- which gets it right
2. run in MPS mode, but with "noapic"
3. run in MPS mode, with a patch to do #2 automatically
4. run in MPS mode, with a new patch to correct just the bad entry
5. run in MPS mode, and use the back ports, not the front ports.
The ACPI issue is closed and the MPS issue is root-caused
and has multiple workarounds. I recommend options #1 and #5 --
I do not recommend options 2,3,4 since it would just clutter
the kernel with a model-specific BIOS workaround for a mode
that most people don't use anyway.
patch in comment #3 shipped in Linux-2.6.23-rc1
closed.
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