I tried the latest mainline linux kernel for wily: no sd-card and the same errors in dmesg. Oddly enough, an older 3.19.0-31 kernel which was still in my grub list also showed the same behavior. I cannot recall this happening when i used 15.04 vivid.
I booted from a live stick with 15.04 and the SD-card was detected. I have added the dmesg output of the 4.3.0 mainline. Let me know if you need the dmesg output of the other two kernels and/or want me to do more testing and data collecting. ** Attachment added: "linux kernel 4.3.0 mainline dmesg output" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1514821/+attachment/4516751/+files/4.3.0.dmesg -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1514821 Title: SD card reader on Dell E7250 doesn't work in Ubuntu 15.10 Status in linux package in Ubuntu: Confirmed Bug description: I booted the machine with the SD card removed. I logged into Unity, inserted the SD card and saw the error messages popping up in dmesg: sdhci: Timeout waiting for Buffer Read Ready interrupt during tuning procedure, falling back to fixed sampling clock mmc0: tuning execution failed mmc0: error -5 whilst initialising SD card I was expecting to see the SD card mounted in the Unity actionbar, like in 15.04. ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: linux-image-4.2.0-18-generic 4.2.0-18.22 ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3 Uname: Linux 4.2.0-18-generic x86_64 ApportVersion: 2.19.1-0ubuntu4 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: feverdij 1864 F.... pulseaudio /dev/snd/controlC0: feverdij 1864 F.... pulseaudio Date: Tue Nov 10 13:56:18 2015 HibernationDevice: RESUME=UUID=a507736b-2856-48bd-ae57-a3a1a678c150 InstallationDate: Installed on 2015-06-19 (144 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) MachineType: Dell Inc. Latitude E7250 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-18-generic root=UUID=fe9cd698-4d8c-4ea1-9cce-af132d859b83 ro quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-4.2.0-18-generic N/A linux-backports-modules-4.2.0-18-generic N/A linux-firmware 1.149.1 SourcePackage: linux UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' UpgradeStatus: Upgraded to wily on 2015-11-02 (8 days ago) dmi.bios.date: 09/01/2015 dmi.bios.vendor: Dell Inc. dmi.bios.version: A07 dmi.board.asset.tag: TUD254222 dmi.board.name: 0TVD2T dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.asset.tag: TUD254222 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA07:bd09/01/2015:svnDellInc.:pnLatitudeE7250:pvr:rvnDellInc.:rn0TVD2T:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.name: Latitude E7250 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1514821/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp