[mythtv-users] mce remote (lirc) fails after resume from standby

Sun Jun 28 12:45:30 UTC 2009

Hi Alan,

On Sat, Jun 27, 2009 at 09:15:13PM -0600, Alan Marchiori wrote:

> I have most of my issues figured out but getting the remote to work
> consistently after standby is still causing problems.  The only
> reliable way to get the remote to work is unplug the usb receiver and
> plug it back in.  Restarting lirc or myth doesn't help.  Most of the
> time it fails but every once in a while it works fine.  Below is the
> relevant parts from syslog after a resume (showing the failure).  The
> call trace seems to indicate something is breaking... but what, why,
> and how to fix it?

The "warn_slowpat" stack trace may not be a problem -- I've seen it in
the past and haven't noticed any bad effects; I think it just means (at
least in some cases) that some driver took longer to wake up.

I also had problems with my MCE remote after resume from S3 sleep. It
was weird because things would work fine if I resumed by pressing the
machine's power botton instead of doing an USB resume by pressing the
power button on the remote.

I ended up adding one line to the lirc_mceusb2.c file and this fixed the
problem for me:

root at altamira:/usr/src/lirc-0.8.4a/drivers/lirc_mceusb2# diff -u lirc_mceusb2.c.orig lirc_mceusb2.c

--- lirc_mceusb2.c.orig 2009-01-28 16:56:52.000000000 -0500
+++ lirc_mceusb2.c      2009-01-28 16:29:26.000000000 -0500
@@ -1121,6 +1121,7 @@
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0)
        .suspend =      usb_remote_suspend,
        .resume =       usb_remote_resume,
+       .reset_resume = usb_remote_resume,
 #endif
        .id_table =     usb_remote_table
 };

This was for lirc 0.8.4a. I just checked lirc 0.8.5 and they've changed
function names but the driver structure is still lacking a .reset_resume
field.

I don't know if the above will fix your resume problem, but my
recommendation is that you try the above patch. As I said, resuming from
S3 sleep by pressing the remote's power botton would not work at all
for me without the above little patch, and I've been running for a few
months with the above patch with no ill or side effects.

Cheers,

Eloy Paris.-


> Jun 27 21:04:37 fe1 kernel: [ 1008.813863] ACPI: Waking up from system
> sleep state S3
> <snip>...
> Jun 27 21:04:37 fe1 kernel: [ 1011.656021] usb 2-1: reset low speed
> USB device using ohci_hcd and address 2
> Jun 27 21:04:37 fe1 kernel: [ 1012.356020] usb 2-2: reset low speed
> USB device using ohci_hcd and address 3
> Jun 27 21:04:37 fe1 kernel: [ 1013.044020] usb 2-3: reset low speed
> USB device using ohci_hcd and address 4
> Jun 27 21:04:37 fe1 kernel: [ 1013.584021] usb 2-4: reset full speed
> USB device using ohci_hcd and address 5
> Jun 27 21:04:37 fe1 kernel: [ 1013.799863] lirc_mceusb2 2-4:1.0: no
> reset_resume for driver lirc_mceusb2?
> Jun 27 21:04:37 fe1 kernel: [ 1013.799887] lirc_mceusb2[5]: usb remote
> disconnected
> Jun 27 21:04:37 fe1 kernel: [ 1013.980023] usb 2-4: reset full speed
> USB device using ohci_hcd and address 5
> Jun 27 21:04:37 fe1 kernel: [ 1014.189839] lirc_dev:
> lirc_register_plugin: sample_rate: 0
> Jun 27 21:04:37 fe1 kernel: [ 1014.195835] lirc_mceusb2[5]: Philips
> eHome Infrared Transceiver on usb2:5
> Jun 27 21:04:37 fe1 kernel: [ 1014.195915] PM: resume devices took 5.376 seconds
> Jun 27 21:04:37 fe1 kernel: [ 1014.195921] ------------[ cut here ]------------
> Jun 27 21:04:37 fe1 kernel: [ 1014.195923] WARNING: at
> /build/buildd/linux-2.6.28/kernel/power/main.c:177
> suspend_test_finish+0x7c/0x80()
> Jun 27 21:04:37 fe1 kernel: [ 1014.195924] Component: resume devices
> Jun 27 21:04:37 fe1 kernel: [ 1014.195925] Modules linked in:
> nls_cp437 cifs ppdev bridge stp bnep input_polldev video output xfs lp
> parport snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm_oss snd_mixer_oss
> snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi
> snd_seq_midi_event snd_seq snd_timer snd_seq_device snd soundcore
> lirc_mceusb2 i2c_nforce2 serio_raw pcspkr snd_page_alloc k8temp
> lirc_dev joydev nvidia(P) hid_logitech ff_memless usbhid forcedeth
> fbcon tileblit font bitblit softcursor
> Jun 27 21:04:37 fe1 kernel: [ 1014.195946] Pid: 6110, comm: pm-suspend
> Tainted: P           2.6.28-13-generic #44-Ubuntu
> Jun 27 21:04:37 fe1 kernel: [ 1014.195948] Call Trace:
> Jun 27 21:04:37 fe1 kernel: [ 1014.195953]  [<ffffffff80250927>]
> warn_slowpath+0xb7/0xf0
> Jun 27 21:04:37 fe1 kernel: [ 1014.195956]  [<ffffffff8026d478>] ?
> down_trylock+0x38/0x50
> Jun 27 21:04:37 fe1 kernel: [ 1014.195959]  [<ffffffff80251040>] ?
> try_acquire_console_sem+0x10/0x40
> Jun 27 21:04:37 fe1 kernel: [ 1014.195962]  [<ffffffff8025c676>] ?
> lock_timer_base+0x36/0x70
> Jun 27 21:04:37 fe1 kernel: [ 1014.195965]  [<ffffffff80531fcf>] ?
> usb_suspend_both+0x26f/0x310
> Jun 27 21:04:37 fe1 kernel: [ 1014.195969]  [<ffffffff80697836>] ?
> printk+0x67/0x69
> Jun 27 21:04:37 fe1 kernel: [ 1014.195972]  [<ffffffff804188a7>] ?
> kobject_put+0x27/0x60
> Jun 27 21:04:37 fe1 kernel: [ 1014.195975]  [<ffffffff804b6075>] ?
> put_device+0x15/0x20
> Jun 27 21:04:37 fe1 kernel: [ 1014.195979]  [<ffffffff804be09a>] ?
> dpm_complete+0x18a/0x1a0
> Jun 27 21:04:37 fe1 kernel: [ 1014.195981]  [<ffffffff8028003c>]
> suspend_test_finish+0x7c/0x80
> Jun 27 21:04:37 fe1 kernel: [ 1014.195984]  [<ffffffff80280124>]
> suspend_devices_and_enter+0xe4/0x180
> Jun 27 21:04:37 fe1 kernel: [ 1014.195986]  [<ffffffff802803d9>]
> enter_state+0xe9/0x120
> Jun 27 21:04:37 fe1 kernel: [ 1014.195989]  [<ffffffff802804ca>]
> state_store+0xba/0x100
> Jun 27 21:04:37 fe1 kernel: [ 1014.195991]  [<ffffffff80418747>]
> kobj_attr_store+0x17/0x20
> Jun 27 21:04:37 fe1 kernel: [ 1014.195993]  [<ffffffff80347675>]
> sysfs_write_file+0xc5/0x140
> Jun 27 21:04:37 fe1 kernel: [ 1014.195997]  [<ffffffff802e7eeb>]
> vfs_write+0xcb/0x130
> Jun 27 21:04:37 fe1 kernel: [ 1014.195999]  [<ffffffff802e8040>]
> sys_write+0x50/0x90
> Jun 27 21:04:37 fe1 kernel: [ 1014.196013]  [<ffffffff8021253a>]
> system_call_fastpath+0x16/0x1b
> Jun 27 21:04:37 fe1 kernel: [ 1014.196015] ---[ end trace bfba85e0b835c862 ]---
> Jun 27 21:04:37 fe1 kernel: [ 1014.196103] PM: Finishing wakeup.
> Jun 27 21:04:37 fe1 lircd-0.8.4a[1652]: error reading from /dev/lirc0
> Jun 27 21:04:37 fe1 lircd-0.8.4a[1652]: No such device
> Jun 27 21:04:37 fe1 kernel: [ 1014.196104] Restarting tasks ... done.
> Jun 27 21:04:37 fe1 lircd-0.8.4a[1652]: caught signal
> Jun 27 21:04:37 fe1 lircd-0.8.4a[6251]: lircd(default) ready
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