Arch Linux

blablubs82352

Member

Registered: 2016-09-25

Posts: 21

SD card reader not working

Hi,

I have a sdcard reader problem with my Lenovo Yoga 460. I'm running arch and a debian testing on it. The Problem occurs on both systems in the same way.
Nothing is happening, when I insert a ssd card.

lspci gives me the following

02:00.0 SD Host controller: O2 Micro, Inc. SD/MMC Card Reader Controller (rev 01)

dmesg hints that something is going wrong while initilizing.

[ 5146.966814] sdhci: Timeout waiting for Buffer Read Ready interrupt during tuning procedure, falling back to fixed sampling clock
[ 5146.966842] mmc0: tuning execution failed: -5
[ 5146.966854] mmc0: error -5 whilst initialising SD card

the according drivers seem to be loaded
lsmod | grep sd
sd_mod                 45056  4
scsi_mod              233472  5 sg,uas,usb_storage,libata,sd_mod
sdhci_pci              28672  0
sdhci                  40960  1 sdhci_pci
mmc_core              126976  2 sdhci,sdhci_pci

I couldn't find any information about the error code -5 any where.
Has anybody an idea? I asked the same question in the german forum, but they where very picky about the language.
https://bbs.archlinux.de/viewtopic.php?id=29618

/Peter

ukhippo

Member

From: Non-paged pool

Registered: 2014-02-21

Posts: 366

Re: SD card reader not working

I don't have your hardware, but I was intrigued. Google (or DuckDuckGo in my case) is your friend here. Searching for “mmc tuning execution failed” gave the first hit as https://bugs.launchpad.net/bugs/1523178 which shows this is a kernel issue: https://bugzilla.kernel.org/show_bug.cgi?id=109231 (which also gives a workaround).
Try the workaround.

blablubs82352

Member

Registered: 2016-09-25

Posts: 21

Re: SD card reader not working

Thx. Have been allready on this bugreportpage. Next time I will try harder to understand posts and try out workarounds.
I fixed by the help of this: http://www.0xf8.org/2016/01/workaround- … ion-4-1-8/
So its solved.
/Peter