I've updated the bios to version A09 today and checked if the problem
still exists. It does.
So with the information from Blackgr i tested the two kernel versions
and i can indeed verify that kernel 4.1.8-040108-generic reads mt SDXC
card just fine (four line excerpt from dmesg):
[ 92.252656] mmc0: new ultra high speed SDR104 SDXC card at address 0007
[ 92.252866] mmcblk0: mmc0:0007 SD64G 58.1 GiB
[ 92.255131] mmcblk0: p1
[ 92.471332] EXT4-fs (mmcblk0p1): mounted filesystem with ordered data mode.
Opts: (null)
tud254222 ~$ uname -a
Linux tud254222 4.1.8-040108-generic #201509211431 SMP Mon Sep 21 18:34:20 UTC
2015 x86_64 x86_64 x86_64 GNU/Linux
whereas kernel 4.1.9-040109-generic shows the erroneous behaviour (three
line excerpt from dmesg, repeated 4 times):
[ 64.118346] sdhci: Timeout waiting for Buffer Read Ready interrupt during
tuning procedure, falling back to fixed sampling clock
[ 64.120131] mmc0: tuning execution failed
[ 64.120136] mmc0: error -5 whilst initialising SD card
tud254222 ~/Downloads/4.1.9$ uname -a
Linux tud254222 4.1.9-040109-generic #201509291430 SMP Tue Sep 29 18:32:50 UTC
2015 x86_64 x86_64 x86_64 GNU/Linux
Thank you Blackgr for the hard work!
My SD card is a Kingston SD10VG2/64GB SDXC
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1514821
Title:
SD card reader on Dell E7250 doesn't work in Ubuntu 15.10
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