On Tue, 6 Dec 2005, Carl-Daniel Hailfinger wrote:
> Hi,
>
> since I switched to 2.6.15-rc2-git6, my machine is not able to suspend
> anymore if my USB printer is plugged in. The problem is reproducible.
>
> usb 1-2: new full speed USB device using uhci_hcd and address 3
> drivers/usb/class/usblp.c: usblp0: USB Bidirectional printer dev 3 if 0 alt 0
> proto 2 vid 0x04E8 pid 0x3242
> usbcore: registered new driver usblp
> drivers/usb/class/usblp.c: v0.13: USB Printer Device Class driver
> PM: Preparing system for mem sleep
> Stopping tasks: ==================================================|
> usblp 1-2:1.0: no suspend?
> Could not suspend device 1-2: error -16
> Some devices failed to suspend
> Restarting tasks... done
>
>
> Earlier kernels (2.6.14.2 and before) worked just fine.
>
> A first search suggests this problem was introduced between
> 2.6.14 and 2.6.15-rc2-git6. Should I try to narrow it down further?
No need. Try the patch below and see if it helps.
Alan Stern
Index: linux-2.6.15-rc3/drivers/usb/core/usb.c
===================================================================
--- linux-2.6.15-rc3.orig/drivers/usb/core/usb.c
+++ linux-2.6.15-rc3/drivers/usb/core/usb.c
@@ -1414,8 +1414,10 @@ static int usb_generic_suspend(struct de
}
if ((dev->driver == NULL) ||
- (dev->driver_data == &usb_generic_driver_data))
+ (dev->driver_data == &usb_generic_driver_data)) {
+ dev->power.power_state.event = PM_EVENT_FREEZE;
return 0;
+ }
intf = to_usb_interface(dev);
driver = to_usb_driver(dev->driver);
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