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#3 2012-02-08 08:21:36
- ngoonee
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- From: Between Thailand and Singapore
- Registered: 2009-03-17
- Posts: 7,358
Re: USB ports remain powered during suspend
I haven't used suspend in ages, but when I last did (a year ago?) the USB ports were still powered during suspend anyway (drained my battery overnight because of that and not noticing my cooler fan was still turned on).
So I'd say that's expected behaviour? Unless you're talking about suspend-to-DISK (hibernate) of course.
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#4 2012-02-08 08:38:31
- RaisedFist
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- From: Romania
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Re: USB ports remain powered during suspend
This didn't happen to me before the last update, that's why I'm asking. When I suspended (to RAM) my laptop, the fan was powered down. Now I have it powered up all the time and I don't need that.
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#6 2012-02-09 09:42:51
- bernarcher
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- From: Germany
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Re: USB ports remain powered during suspend
Done!
To know or not to know ...
... the questions remain forever.
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#7 2012-03-11 14:22:06
- LeCrayonVert
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- Registered: 2010-09-01
- Posts: 134
Re: USB ports remain powered during suspend
Same issue here, ever since I've upgraded from kernel 3.1.6 to 3.2.9...
There might be some options that have changed in the kernel config...
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#8 2012-03-11 14:46:53
- 65kid
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- From: Germany
- Registered: 2011-01-26
- Posts: 663
Re: USB ports remain powered during suspend
I noticed that since kernel 3.2 Wake-on-USB is enabled by default on my HTPC, I guess this is related.
see /proc/acpi/wakeup
you can toggle enabled/disabled by echoing the device into the file, e.g. echo USBE > /proc/acpi/wakeup. Although I don't know if this will also disable the power.
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#9 2012-03-17 14:58:07
- LeCrayonVert
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- Registered: 2010-09-01
- Posts: 134
Re: USB ports remain powered during suspend
I've tried to use acpitool -W to change the state in /proc/acpi/wakeup without any success...the USB ports remain powered.
What I've done so far :
acpitool -wReturns :
Device S-state Status Sysfs node
---------------------------------------
...
8. EHC1 S3 *enabled pci:0000:00:1d.7
9. USB3 S3 *enabled pci:0000:00:1a.0
10. USB4 S3 *enabled pci:0000:00:1a.1
...EHC1 is my targeted devices
acpitool -W 8There might be some kernel options that changes this behavior ?
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#10 2012-03-17 19:10:44
- LeCrayonVert
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- Registered: 2010-09-01
- Posts: 134
Re: USB ports remain powered during suspend
Unloading uhci-hcd modules seems to fix this issue...
So I've just added
SUSPEND_MODULES="uhci_hcd"to /etc/pm/config.d/modules to have it automatically unloaded/reloaded on suspend/resume 
I believe in a world I can and do understand. A rational universe, explained through rational means.
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#11 2012-10-14 12:18:29
- LeCrayonVert
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- Registered: 2010-09-01
- Posts: 134
Re: USB ports remain powered during suspend
With systemd, pm-utils hooks are no longer supported. So, you might want to add a file in /usr/lib/systemd/system-sleep containing :
#!/bin/sh
case $1/$2 in
pre/*)
echo "Going to $2..."
/sbin/modprobe -r uhci_hcd
;;
post/*)
echo "Waking up from $2..."
/sbin/modprobe uhci_hcd
;;
esacI believe in a world I can and do understand. A rational universe, explained through rational means.
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