http://bugzilla.kernel.org/show_bug.cgi?id=8572
[EMAIL PROTECTED] changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |NEEDINFO
Summary|Dell OptiPlex GX240, ACPI |uhci_hcd:usb2 slows to
|and IO-APIC |131KB/s from 846KB/s in
| |legacy IOAPIC mode - Dell
| |OptiPlex GX240
------- Additional Comments From [EMAIL PROTECTED] 2007-06-03 23:18 -------
Summarizing the e-mail thread...
USB ports on back of the box always run fast, no matter
if in ACPI mode, acpi=off Legacy mode, PIC mode, or IOAPIC mode:
2199226 bytes (2,2 MB) copied, 2.60062 seconds, 846 kB/s
USB ports on the front of the box run at that fast speed
when in ACPI mode, or when in Legacy PIC mode.
But in Legacy IOAPIC mode, they run 6x slower:
2199226 bytes (2,2 MB) copied, 16.7524 seconds, 131 kB/s
please attach the output from lspci -vv
it is necessary to trace exactly how ACPI is configuring
the interrupts for these devices.
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