Comment 7 for bug 1509119

I have a DELL E7250 Latitude and after the upgrade from 15.04 my SD cardreader cannot read the Kingston 64GB SDXC anymore. Same error messages in dmesg:

[ 1.886833] sdhci: Timeout waiting for Buffer Read Ready interrupt during tuning procedure, falling back to fixed sampling clock
[ 1.888611] mmc0: tuning execution failed
[ 1.888616] mmc0: error -5 whilst initialising SD card

lspci output fom kernel 4.2.0-18

01:00.0 SD Host controller: O2 Micro, Inc. SD/MMC Card Reader Controller (rev 01) (prog-if 01)
 Subsystem: Dell Device 062d
 Flags: bus master, fast devsel, latency 0, IRQ 16
 Memory at f7101000 (32-bit, non-prefetchable) [size=4K]
 Memory at f7100000 (32-bit, non-prefetchable) [size=2K]
 Capabilities: [6c] Power Management version 3
 Capabilities: [48] MSI: Enable- Count=1/1 Maskable+ 64bit+
 Capabilities: [80] Express Endpoint, MSI 00
 Capabilities: [100] Virtual Channel
 Capabilities: [230] Latency Tolerance Reporting
 Capabilities: [240] L1 PM Substates
 Kernel driver in use: sdhci-pci