[Bug 597301] [NEW] I/O errors writing to SD card

[Mark Greenwood]

Public bug reported:

There are Kubuntu 10.04, all current updates.

There are a few similar bug reports to this one but they're all related
to USB devices. I'm having trouble with the built-in card reader on my
laptop. When writing large numbers of files, especially large ones, to a
large capacity card (8GB or more) I get lots of I/O errors and after a
while the card unmounts itself.

I get the same kind of errors when reading from my CD drive too.

I'm able to improve the issue by doing 
sudo sh -c "echo 120 > /sys/block/mmcblk0/queue/max_sectors_kb"
However I don't regard this as a solution because it's not obvious or automatic. There should at least be some documentation somewhere about how to make that happen automatically when an SD card is inserted.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-generic 2.6.32.22.23
Regression: No
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.32-22.36-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-22-generic i686
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  bob        4075 F.... knotify4
                      bob        4171 F.... kmix
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xfc400000 irq 32'
   Mixer name	: 'SigmaTel STAC9872AK'
   Components	: 'HDA:83847662,104d1c00,00100201 HDA:14f12c06,104d1700,00100000'
   Controls      : 17
   Simple ctrls  : 10
Date: Tue Jun 22 15:00:56 2010
HibernationDevice: RESUME=UUID=268b116b-6212-4018-983b-ab632cdae336
InstallationMedia: Kubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100427)
MachineType: Sony Corporation VGN-FZ31M
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-22-generic root=UUID=bc896133-3a66-4618-a31e-83a0344d31ed ro quiet splash
ProcEnviron:
 LANGUAGE=
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.34
RfKill:
 0: phy0: Wireless LAN
 	Soft blocked: no
 	Hard blocked: yes
SourcePackage: linux
dmi.bios.date: 12/21/2007
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: R2110J7
dmi.board.asset.tag: N/A
dmi.board.name: VAIO
dmi.board.vendor: Sony Corporation
dmi.board.version: N/A
dmi.chassis.asset.tag: N/A
dmi.chassis.type: 10
dmi.chassis.vendor: Sony Corporation
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrR2110J7:bd12/21/2007:svnSonyCorporation:pnVGN-FZ31M:pvrC6005TES:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
dmi.product.name: VGN-FZ31M
dmi.product.version: C6005TES
dmi.sys.vendor: Sony Corporation

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug hibernate i386 lucid needs-upstream-testing resume

-- 
I/O errors writing to SD card
https://bugs.launchpad.net/bugs/597301
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