@timg-tpi: Have you seen bug #1217189, involving machine lock-ups due to this error, probably triggered after heavy swapping?
Do you have any suggestions as to why regular raring users seem unaffected by this bug (or at least they're not complaining)? -- 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/1218278 Title: When creating a swap device using zram I get Buffer I/O errors Status in “linux” package in Ubuntu: Confirmed Bug description: I use zram as swap device, but get Buffer I/O errors when creating a swap device. 1. modprobe zram 2. echo 2097152000 > /sys/block/zram0/disksize 3. mkswap /dev/zram0 tail /varlog/syslog Aug 29 12:07:01 ubz10035sev kernel: [ 1044.003716] Buffer I/O error on device zram0, logical block 511999 Aug 29 12:07:01 ubz10035sev kernel: [ 1044.005792] Buffer I/O error on device zram0, logical block 511999 Aug 29 12:07:01 ubz10035sev kernel: [ 1044.007918] Buffer I/O error on device zram0, logical block 511999 Aug 29 12:07:01 ubz10035sev kernel: [ 1044.009930] Buffer I/O error on device zram0, logical block 511999 Aug 29 12:07:01 ubz10035sev kernel: [ 1044.011965] Buffer I/O error on device zram0, logical block 511999 Aug 29 12:07:01 ubz10035sev kernel: [ 1044.012917] Buffer I/O error on device zram0, logical block 511999 Aug 29 12:07:01 ubz10035sev kernel: [ 1044.013793] Buffer I/O error on device zram0, logical block 511999 Aug 29 12:07:01 ubz10035sev kernel: [ 1044.014680] Buffer I/O error on device zram0, logical block 511999 Aug 29 12:07:01 ubz10035sev kernel: [ 1044.015542] Buffer I/O error on device zram0, logical block 511999 Aug 29 12:07:01 ubz10035sev kernel: [ 1044.016395] Buffer I/O error on device zram0, logical block 511999 cat /proc/version_signature Ubuntu 3.8.0-29.42-generic 3.8.13. --- ApportVersion: 2.9.2-0ubuntu8.3 Architecture: amd64 AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/hwC0D3', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/pcmC0D2c', '/dev/snd/pcmC0D3p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found. CurrentDmesg: Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order /var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission denied DistroRelease: Ubuntu 13.04 MachineType: Hewlett-Packard HP Compaq 8100 Elite CMT PC MarkForUpload: True Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: ro initrd=initrd.img nbdroot=10.7.28.49:9577 nbdswap=10.7.28.49:9573 clientid=lin BOOT_IMAGE=vmlinuz ProcVersionSignature: Ubuntu 3.8.0-29.42-generic 3.8.13.5 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RfKill: Tags: raring Uname: Linux 3.8.0-29-generic x86_64 UpgradeStatus: Upgraded to raring on 2013-07-09 (51 days ago) UserGroups: admin sudo WifiSyslog: dmi.bios.date: 12/16/2009 dmi.bios.vendor: Hewlett-Packard dmi.bios.version: 786H1 v01.02 dmi.board.asset.tag: 11618 dmi.board.name: 304Bh dmi.board.vendor: Hewlett-Packard dmi.chassis.asset.tag: 11618 dmi.chassis.type: 6 dmi.chassis.vendor: Hewlett-Packard dmi.modalias: dmi:bvnHewlett-Packard:bvr786H1v01.02:bd12/16/2009:svnHewlett-Packard:pnHPCompaq8100EliteCMTPC:pvr:rvnHewlett-Packard:rn304Bh:rvr:cvnHewlett-Packard:ct6:cvr: dmi.product.name: HP Compaq 8100 Elite CMT PC dmi.sys.vendor: Hewlett-Packard To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1218278/+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