S3 Suspend failure with 2.6.15-rc2-git6

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:

usb 1-2: new full speed USB device using uhci_hcd and address 2
drivers/usb/class/usblp.c: usblp0: USB Bidirectional printer dev 2 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: ====================================================|
ACPI: PCI interrupt for device 0000:02:01.1 disabled
ACPI: PCI interrupt for device 0000:02:01.0 disabled
ACPI: PCI interrupt for device 0000:01:00.0 disabled
ACPI: PCI interrupt for device 0000:00:1f.5 disabled
ACPI: PCI interrupt for device 0000:00:1d.7 disabled
ACPI: PCI interrupt for device 0000:00:1d.2 disabled
ACPI: PCI interrupt for device 0000:00:1d.1 disabled
ACPI: PCI interrupt for device 0000:00:1d.0 disabled
PM: Entering mem sleep
Back to C!
PM: Finishing wakeup.
ACPI: PCI Interrupt 0000:00:1d.0[A] -> Link [LNKA] -> GSI 5 (level, low) -> IRQ 5
PCI: Setting latency timer of device 0000:00:1d.0 to 64
ACPI: PCI Interrupt 0000:00:1d.0[A] -> Link [LNKA] -> GSI 5 (level, low) -> IRQ 5
ACPI: PCI Interrupt 0000:00:1d.1[B] -> Link [LNKD] -> GSI 11 (level, low) -> IRQ 11
PCI: Setting latency timer of device 0000:00:1d.1 to 64
ACPI: PCI Interrupt 0000:00:1d.1[B] -> Link [LNKD] -> GSI 11 (level, low) -> IRQ 11
ACPI: PCI Interrupt 0000:00:1d.2[C] -> Link [LNKC] -> GSI 5 (level, low) -> IRQ 5
PCI: Setting latency timer of device 0000:00:1d.2 to 64
ACPI: PCI Interrupt 0000:00:1d.2[C] -> Link [LNKC] -> GSI 5 (level, low) -> IRQ 5
ACPI: PCI Interrupt 0000:00:1d.7[D] -> Link [LNKH] -> GSI 11 (level, low) -> IRQ 11
PCI: Setting latency timer of device 0000:00:1d.7 to 64
ACPI: PCI Interrupt 0000:00:1d.7[D] -> Link [LNKH] -> GSI 11 (level, low) -> IRQ 11
PCI: Setting latency timer of device 0000:00:1e.0 to 64
ACPI: PCI Interrupt 0000:00:1f.1[A] -> Link [LNKC] -> GSI 5 (level, low) -> IRQ 5
ACPI: PCI Interrupt 0000:00:1f.5[B] -> Link [LNKB] -> GSI 5 (level, low) -> IRQ 5
PCI: Setting latency timer of device 0000:00:1f.5 to 64
PCI: Enabling device 0000:01:00.0 (0000 -> 0003)
ACPI: PCI Interrupt 0000:01:00.0[A] -> Link [LNKA] -> GSI 5 (level, low) -> IRQ 5
PCI: Setting latency timer of device 0000:01:00.0 to 64
eth0: link down
ACPI: PCI Interrupt 0000:02:01.0[A] -> Link [LNKB] -> GSI 5 (level, low) -> IRQ 5
ACPI: PCI Interrupt 0000:02:01.1[B] -> Link [LNKA] -> GSI 5 (level, low) -> IRQ 5
ACPI: PCI Interrupt 0000:02:01.2[C] -> Link [LNKC] -> GSI 5 (level, low) -> IRQ 5
eth0: link up, 100Mbps, full-duplex, lpa 0x45E1
Restarting tasks...<6>usb 1-2: USB disconnect, address 2
drivers/usb/class/usblp.c: usblp0: removed
usb 1-2: new full speed USB device using uhci_hcd and address 3
done
drivers/usb/class/usblp.c: usblp0: USB Bidirectional printer dev 3 if 0 alt 0 proto 2 vid 0x04E8 pid 0x3242

However, this suspend failure has one VERY good side effect. It turns off the fans on my laptop. If anyone can explain that effect, I'd be most interested. I'd even be willing to tolerate that bug to be able to switch off the fans.

Regards,
Carl-Daniel

http://www.hailfinger.org/



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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?

Regards,
Carl-Daniel

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Hi Carl-Daniel,

yes, that would be good.

In this case, it would also help if you'd open a bug at bugzilla.kernel.org.

TIA
Adrian

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

Hi!

Well, usblp does not have any suspend method, and usb probably just started checking... There's also CONFIG_USB_SUSPEND option you may want to play with.
Pavel

Thanks, Sharp!