USB Devices Not Detected and High CPU Usage

kernel_geek · 2011-06-06 17:05:15

Hello, I'm using arch on a Dell 1720 laptop.

I have some weird issues involving detection of USB devices.

When the laptop is on battery and I plug in a USB mouse the power flickers on and flickers off again; nothing in the logs/dmesg.

If I then connect the AC adapter the reconnect the mouse, the same happens, except the CPU usage hits 87%+ on one core.

Running

sudo rmmod ehci_hcd

solves the problem; the CPU usage drops and the mouse gets detected.

Subsequent attempts to hotplug USB devices does nothing, no high CPU and no Power.

Rebooting the computer is the only way to use USB devices at the moment.

usb-autosuspend is disabled in laptop-mode.

uname -a:

Linux MatSalleh 2.6.39-ck #1 SMP PREEMPT Sun Jun 5 18:30:30 EDT 2011 x86_64 Intel(R) Core(TM)2 Duo CPU T7250 @ 2.00GHz GenuineIntel GNU/Linux

The same happens with the stock kernel too

My kernel line in grub:

kernel /vmlinuz26-ck root=/dev/sda3 elevator=bfq ro resume=/dev/sda2

Any ideas?

Thanks,

Chris.

karol · 2011-06-06 17:21:54

I'm not sure if any those bug reports is related. Maybe this one?

kernel_geek · 2011-06-06 22:48:21

None of those, besides this laptop only has USB 2.0.

lilsirecho · 2011-06-07 02:00:31

Perhaps the USB connector is damaged, causing excess power drain suggesting that the current limiter isn't functioning.

tydell · 2011-06-07 06:31:34

I had similar problem with USB pendrive, it wasn't detected and it makes high cpu usage. It was problem with ehci_hcd module
This one helps me to solve this problem

kernel_geek · 2011-06-07 06:53:45

lilsirecho wrote:

Perhaps the USB connector is damaged, causing excess power drain suggesting that the current limiter isn't functioning.

I highly doubt it's that, it was working fine on ubuntu just days before...

tydell wrote:

I had similar problem with USB pendrive, it wasn't detected and it makes high cpu usage. It was problem with ehci_hcd module
This one helps me to solve this problem

My USB devices don't even get detected, so that script won't work.

Last night I hibernated my computer after not using any USB devices, on resume, my CPU usage was 100%, removing the ehci_hcd module fixed it.

Any more ideas?

I'm tempted to build a vanilla kernel...

ewaller · 2011-06-07 14:59:17

kernel_geek wrote:

...
I'm tempted to build a vanilla kernel...

Actually, that is not that tough to do. It might provide some insight

kernel_geek · 2011-06-08 15:56:00

I downloaded the 2.6.38 sources and patched it with the 2.6.38-ck1 patch, built it and installed the modules; the issue still persists.

What do I try next?

Thanks,

Chris.

lilsirecho · 2011-06-08 16:06:29

Perhaps lsusb may give a clue......

kernel_geek · 2011-06-08 16:09:44

Naa nothing comes up in lsusb, or dmesg, or anything....

kernel_geek · 2011-06-16 12:30:40

I had to downgrade as far as 2.6.33 to solve the problem.

But now my nouveau driver doesn't work; X won't start. How do I go about obtaining a compatible nouveau driver?

Thanks,

Chris.

gauthma · 2011-08-02 11:22:31

Hello,
I justed had a somewhat similar problem: with a Dell Latitude E5420, after suspending and resuming, the usb mouse was simply undetected. Pluging it out and in again, and in different usb plugs, yielded no result. Removing and then installing ehci_hcd module however, solved the problem.

I'm using kernel 2.6.39-ARCH and stable (ie, not using the testing rep)

Last edited by gauthma (2011-08-02 11:23:29)

kernel_geek · 2011-08-02 12:52:27

gauthma wrote:

Hello,
I justed had a somewhat similar problem: with a Dell Latitude E5420, after suspending and resuming, the usb mouse was simply undetected. Pluging it out and in again, and in different usb plugs, yielded no result. Removing and then installing ehci_hcd module however, solved the problem.
I'm using kernel 2.6.39-ARCH and stable (ie, not using the testing rep)

Yeah that works most of the time, but not always; sometimes if I suspend and resume a few times, USB devices don't work at all, and I have to reboot...

csocratess · 2011-08-24 11:22:36

I can confirm this problem on my DELL e6410. No USB devices get recognized whenever power is disconnected (i.e., laptop runs on battery), or when the laptop is suspended or hibernated.

Does anyone know if a bug is filed on this, and if there exists a way to solve this issue..

Arch Linux

#1 2011-06-06 17:05:15

USB Devices Not Detected and High CPU Usage

#2 2011-06-06 17:21:54

Re: USB Devices Not Detected and High CPU Usage

#3 2011-06-06 22:48:21

Re: USB Devices Not Detected and High CPU Usage

#4 2011-06-07 02:00:31

Re: USB Devices Not Detected and High CPU Usage

#5 2011-06-07 06:31:34

Re: USB Devices Not Detected and High CPU Usage

#6 2011-06-07 06:53:45

Re: USB Devices Not Detected and High CPU Usage

#7 2011-06-07 14:59:17

Re: USB Devices Not Detected and High CPU Usage

#8 2011-06-08 15:56:00

Re: USB Devices Not Detected and High CPU Usage

#9 2011-06-08 16:06:29

Re: USB Devices Not Detected and High CPU Usage

#10 2011-06-08 16:09:44

Re: USB Devices Not Detected and High CPU Usage

#11 2011-06-16 12:30:40

Re: USB Devices Not Detected and High CPU Usage

#12 2011-08-02 11:22:31

Re: USB Devices Not Detected and High CPU Usage

#13 2011-08-02 12:52:27

Re: USB Devices Not Detected and High CPU Usage

#14 2011-08-24 11:22:36

Re: USB Devices Not Detected and High CPU Usage

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