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#1 2016-06-09 06:22:36

bams
Member
Registered: 2016-06-09
Posts: 2

card reader x453m linux 4.6.1-2

Hi,

I've been using arch for the last 3 months. My laptop is Asus X453M and previously, arch never recognise my internal card reader. The error message would be something like usb1-4 description error

Yesterday I upgraded to kernel 4.6.1-2 and magically, the card reader was recognised. from dmesg:
[    3.110339] usb 1-4: new full-speed USB device number 4 using xhci_hcd
and works perfectly !!

BUT, if I shutdown or restart arch and boot into arch again, the card reader is not recognised anymore

Strangely, if I start windows (win10 preinstalled) first, then restart or shutdown and boot into arch, then my card reader will be recognised again.

this is my card-reader description from lspci:
03:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5286 PCI Express Card Reader (rev 01)

Any ideas how to solve this problem?

Thanks

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#2 2016-06-09 15:03:16

ewaller
Administrator
From: Pasadena, CA
Registered: 2009-07-13
Posts: 19,739

Re: card reader x453m linux 4.6.1-2

You might try something along these lines: http://unix.stackexchange.com/questions … usb-device
The idea is that you force the USB bus to re-enumerate.  That stack exchange link has additional links to things you might try.


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Sometimes it is the people no one can imagine anything of who do the things no one can imagine. -- Alan Turing
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#3 2016-06-10 13:48:18

bams
Member
Registered: 2016-06-09
Posts: 2

Re: card reader x453m linux 4.6.1-2

Hi ewaller, thanks for the direction. However when I put in those commands, this is what happened:

[bams@archie ~]$ su
Password:
[root@archie bams]# echo suspend > /sys/bus/usb/devices/1-4/power/level
bash: echo: write error: Invalid argument

root is not good enough to perform the command ??

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