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I've a Realtek multicard reader (vendor: 0bda, device: 0151) that works well. But a few days ago it started to make a lot of log noise with continuous reset messages when there is no sdcard inserted:
[ 1105.846841] usb 1-9: reset high-speed USB device number 2 using xhci_hcd
[ 1173.764481] usb 1-9: reset high-speed USB device number 2 using xhci_hcd
[ 1196.874721] usb 1-9: reset high-speed USB device number 2 using xhci_hcd
[ 1280.010251] usb 1-9: reset high-speed USB device number 2 using xhci_hcd
[ 1280.250129] usb 1-9: reset high-speed USB device number 2 using xhci_hcdWhen a sdcard is inserted the noise stops.
I've captured the USB conversation and I've seen that the kernel is constantly checking the device, as the Wireshark capture shows:
15 0.793799 host 1.2.1 USBMS 95 SCSI: Test Unit Ready LUN: 0x03
16 0.793832 1.2.1 host USB 64 URB_BULK out
17 0.793842 host 1.2.2 USB 64 URB_BULK in
18 0.793903 1.2.2 host USBMS 77
19 0.793916 host 1.2.1 USBMS 95 SCSI: Request Sense LUN: 0x03
20 0.793941 1.2.1 host USB 64 URB_BULK out
21 0.793952 host 1.2.2 USB 64 URB_BULK in
22 0.794058 1.2.2 host USB 82 URB_BULK in But sometimes, when no card is inserted, the last response from the device is
URB status: Broken pipe (-EPIPE) (-32)instead of Success. And then the system resets the device.
When a card is inserted everything works ok.
The current kernel is 5.4.23-1-lts. I'm not sure when this logs messages started, with the latest update or before.
I've tried to modify the power options in /sys/bus/usb/devices/1-9/power folder with no success.
Does anyone know how to solve this problem or where can I find more info for solving it? Because it's getting a little hard searching in the logs.
Thanks.
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https://superuser.com/questions/668911/ … ts/1107610
Instead removing ehci_hcd driver remove (blacklist) xhci_hcd and reboot.
Or don't plug in card reader with no card.
Last edited by xerxes_ (2020-03-05 11:51:31)
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Thanks for the idea.
As there are also some USB3 ports I can't blacklist xhci. So I'm trying to have USB 3 ports with xhci and USB 2 with ehci.
I'm unbinding the USB 2 ports from xhci and trying to binding them to ehci, but the binding is not working:
[root@monelle paco]# echo 0000:01:00.0 | tee /sys/bus/pci/drivers/ehci-pci/bind
0000:01:00.0
tee: /sys/bus/pci/drivers/ehci-pci/bind: No such deviceI don't know why there is no such device as ls command lists it.
I'm also trying another way: setting avoid_reset_quirk to 1.
echo 1 > /sys/bus/usb/devices/1-9/avoid_reset_quirkIt works, it stops the log noise.
But I can't figure the side effects of this. The only document that I've found about this parameter is https://www.kernel.org/doc/html/latest/ … eset_quirk, and it doesn't really tell what this parameter does.
The idea about always plug the reader with a card can't work. It's an internal reader.
Thanks again.
Last edited by pacoandres (2020-03-05 17:39:13)
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After some tests, setting avoid_reset_quirk to 1 is not good.
I've made an udev rule for setting it on boot and makes lvm2-monitor.service to take up to 2 minutes to start, and plasma desktop up to 5 minutes.
If anyone has an idea about how to solve the log noise, please tell me.
Thanks
Last edited by pacoandres (2020-03-07 07:46:36)
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From the last post I've been working in the first idea: to use ehci on USB 2 ports.
But after some work I'm unable to use ehci on any port. I think that's because the hardware has only xhci host controllers. And I'm thinking that the log noise must be there since ever and I haven't notice it for some reason.
But, anyway, I'd like to remove this log noise. I'll keep working on it, and If I can remove it I'll post here the way.
Thanks
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