On Mon, 13 Jun 2005, Eric Piel wrote:
> Hello,
>
> I've noticed a regression between linux 2.6.11 (.8) and 2.6.12-rc6:
> Suspending and resuming my mouse used to work perfectly on 2.6.11, doing
> echo -n 1 > /sys/bus/usb/devices/usb1/1-2/power/state
> and "echo -n 0..." to resume it.
>
> On 2.6.12-rc6 the suspend generates this printk :
> usbhid 1-2:1.0: suspend 1 fail, code 0
You can ignore that message. It is bogus and doesn't bear much relation
to whether the suspend actually succeeded or not.
> Then the mouse seems to suspend correctly anyway (and power/state shows
> the new state)... but on the resume, even if the mouse led turns on
> again, the pointer will not move anymore. The same happens with any
> suspend level (from 1 to 4). Trigerring the mouse resume by a mouse
> click results in the same problem.
> Anyone has some advice as what can cause this regression? How can I try
> to debug this? I had a look at the diff but nothing shocked me :-/
The resume problem looks like a genuine bug. Try the patch below.
Alan Stern
Index: usb-2.6/drivers/usb/core/hub.c
===================================================================
--- usb-2.6.orig/drivers/usb/core/hub.c
+++ usb-2.6/drivers/usb/core/hub.c
@@ -1733,7 +1733,7 @@ static int finish_port_resume(struct usb
struct usb_driver *driver;
intf = udev->actconfig->interface[i];
- if (intf->dev.power.power_state == PMSG_SUSPEND)
+ if (intf->dev.power.power_state != PMSG_SUSPEND)
continue;
if (!intf->dev.driver) {
/* FIXME maybe force to alt 0 */
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