I also tried the trans mmc which could reproduce this bug on CID 201401-14493, on another 14.04.1 system.
This mmc could be read and written data normally. dmesg-working-trans.log is the dmesg collected by that 14.04.1 system for your reference. ** Attachment added: "dmesg-working-trans.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1397285/+attachment/4376861/+files/dmesg-working-trans.log -- 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/1397285 Title: O2 Micro cardreader [1217:8621] could not read mmc cards Status in HWE Next Project: Triaged Status in linux package in Ubuntu: Triaged Bug description: Dell Inspiron 3048 (CID 201401-14493) on Ubuntu 14.04.1 Steps to reproduce the bug: 1. boot the system, login and wait for the desktop ready to use 2. plugin mmc card Expected result: mmc directory will pop up and ready to use it. Actual result: no thing pop up on desktop ----------- dmesg ---------- [ 41.180392] mmc0: Got data interrupt 0x02000000 even though no data operation was in progress. [ 51.210537] mmc0: Timeout waiting for hardware interrupt. [ 51.212627] mmc0: Got data interrupt 0x02000000 even though no data operation was in progress. [ 61.229658] mmc0: Timeout waiting for hardware interrupt. [ 61.231738] mmc0: Got data interrupt 0x02000000 even though no data operation was in progress. [ 71.248714] mmc0: Timeout waiting for hardware interrupt. [ 71.250815] mmc0: Got data interrupt 0x02000000 even though no data operation was in progress. [ 81.267947] mmc0: Timeout waiting for hardware interrupt. [ 81.270026] mmc0: error -110 whilst initialising MMC card [ 81.377041] mmc0: Got data interrupt 0x02000000 even though no data operation was in progress. [ 86.065388] mmc0: Card removed during transfer! [ 86.065398] mmc0: Resetting controller. [ 86.065544] mmc0: error -123 whilst initialising MMC card ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-32-generic 3.13.0-32.57 [modified: boot/vmlinuz-3.13.0-32-generic] ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4 Uname: Linux 3.13.0-32-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ubuntu 1447 F.... pulseaudio /dev/snd/controlC1: ubuntu 1447 F.... pulseaudio CurrentDesktop: Unity Date: Fri Nov 28 05:20:43 2014 HibernationDevice: RESUME=UUID=265f8dc9-0dff-4a1b-9a3b-08fb662a7daf InstallationDate: Installed on 2014-11-26 (2 days ago) InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) MachineType: Dell Inc. Inspiron 20 Model 3048 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-32-generic root=UUID=f35024ba-c412-4316-8474-bd2a586c6c1b ro rootdelay=60 quiet splash initcall_debug vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-32-generic N/A linux-backports-modules-3.13.0-32-generic N/A linux-firmware 1.127.5 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/18/2013 dmi.bios.vendor: Dell Inc. dmi.bios.version: X19 dmi.board.name: 0HD5K4 dmi.board.vendor: Dell Inc. dmi.board.version: X02 dmi.chassis.type: 13 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrX19:bd12/18/2013:svnDellInc.:pnInspiron20Model3048:pvr01:rvnDellInc.:rn0HD5K4:rvrX02:cvnDellInc.:ct13:cvr: dmi.product.name: Inspiron 20 Model 3048 dmi.product.version: 01 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1397285/+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