[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
** This bug is no longer a duplicate of bug 1215513 System locks up, requires hard reset -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
Gathering all related bugs into this one (as most active) also de- duplicating them from Hang bug which obviously doesn't provide a fix and probably not related since none of my systems hangs but still report zram block errors. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
*** This bug is a duplicate of bug 1215513 *** https://bugs.launchpad.net/bugs/1215513 I'm turning myself from a verbose senior citizen, to an efficient system admin, with customer support experience. Attached to this comment is a short extract of /var/log/kern.log, with only the lines, relevent to this issue (and 1215513). Reminder that I'm running Ubuntu 12.0.4 LTS Server, with Kernel vmlinuz-3.2.0-53-generic-pae. Thank you and best regards, Kenneth Parker, Seattle, WA ** Attachment added: Short extract from /var/log/kern.log. See comment text. https://bugs.launchpad.net/ubuntu/+source/linux-lts-raring/+bug/1217189/+attachment/3835571/+files/kern_log_pico -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
*** This bug is a duplicate of bug 1215513 *** https://bugs.launchpad.net/bugs/1215513 @sea7kenp I agree with you. @henrix says that kernel 3.2.0.54 for Ubuntu 12.04 should be bug free, but I'm still experiencing the error messages on boot. There have been no lock-ups since the update of the kernel (53-54), though. After # fdisk /dev/zram0 followed by p [note that I type zram0 not ram0], I get 515068 as a total number of sectors and the erroneous block in my case is 515067 - the difference between both numbers being one, just as in your case. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
*** This bug is a duplicate of bug 1215513 *** https://bugs.launchpad.net/bugs/1215513 Damian, the fdisk /dev/ram0 was a typo, because I was NOT in any condition to do copy/paste from the system, undergoing the zram0 issue. My actual number is different : 314224, but my situation is the same, because the number in the Buffer I/O Error message was 314223. Everyone, This is NOT just a asthetic issue under Ubuntu 12.0.4 LTS as, when I examined my RAM situation, while fdisk /dev/zram0 gave me number of sectors, I have less RAM, causing a Significant performance degregation, and MUCH thrashing, as my system over-used the poor Type 82 SWAP Partition on the same hard drive as all the other files. PLEASE re-open this, as an ACTUAL problem, not a duplicate, as I see the steam roller effect on issue #1215513, where they appear set to close that problem as fixed, but with an 'ugly' message. If any of the technicions (spelling?) are also on that other issue, PLEASE pass along that ONLY fixing the freeze can adversely affect system performance, at least on some of the Ubuntu Releases. I though the LTS [12.0.4] release was supposed to be stable. Like I said in a prior message, I'm supposed to be a big picture manager who just happens to administer a semi-production system. I happily jump into detailed debug mode, when needed, but am spread thin. When I was doing things like you do, the state of the art release was Red Hat 6! :-O Now that I've dated myself [premature Senior Citizen], I sincerely hope this issue gets the fantastic customer support I used to get, when I could phone the developers and brainstorm solutions. I met Linus Torvalds at a San Francisco Linux conference once, but don't remember the year. He was very gracious back then. I hope you all still maintain social skills. Thank you and best regards, Kenneth Parker, Seattle, WA -- I'm a troubleshooter. I look for trouble, and shoot it! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
*** This bug is a duplicate of bug 1215513 *** https://bugs.launchpad.net/bugs/1215513 I STRONGLY suggest that this is NOT a duplicate of bug #1215513, as a fix was distributed that fixes the System Locks Up part, but leaves this error message. In my first comment, both on this Bug and on Bug #1215513, I responded to the error message by entering fdisk /dev/ram0, under root, followed by p, which showed it to never be partitioned, or anything (like a SWAP partition being defined). So it LOOKS like I was never in danger of bug #1215513, but only experiencing the messages, noted in this Bug (#1217189). Even though no actual harm is done, through a pure experience of Bug # 1217189, the error messages still appear, after fix of #1215513, which can CERTAINLY alarm production Linux administrators anywhere, and cause loss of money in any case where the Server is anything but something assisting non-profit volunteer work, where they can be told they need to be patient and wait for their services. (Actually, due to an early message by dac922, I was able to disable zram services on a system that has no intention of using them). Obviously, what happened was that the Kernel 3.8 work, IMPLEMENTING zram0 swap was back-ported to the 3.2 Kernel tree, somewhere = vmlinuz-3.2.0-53-generic-pae!!! :-O Remember, my system is Ubuntu 12.0.4 LTS Server, which, in my opinion is not in any condition for stray zram swap creation! Fortunately, somebody ported the package zram-config to 12.0.4, allowing me to get it, which, in effect PERMANENTLY DISABLES the zram0 processes, because they fail, during the install of zram-config, allowing apt-get upgrade to state that it was not successful in the install of this package. So I suggest that somebody on this forum, in either of these Bug reports (again, I'm too busy administering Linux to normally submit fixes!) put some of this text in some FAQ file somewhere, Forgive my dry humor in this post. As a Linux admin, I'm trained to roll with the punches and to consider the humor of life on Planet Earth (and, forgive me for adding) the political system in the USA!!! :-) Thank you and best regards, Kenneth Parker, Seattle, WA -- I'm a Troubleshooter. I look for Trouble and Shoot It! :-) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
*** This bug is a duplicate of bug 1215513 *** https://bugs.launchpad.net/bugs/1215513 I got this, right after apt-get upgrade (plus direct installs of kernel). The message shows up on bootup. My system has not locked up yet, which is why I prefer this to bug 1215513. In my case, the Logical Block is 314223. I did (under root): fdisk /dev/ram0, followed by p. This shows up, as if it's a hard disk: 255 heads, 63 sectors/track, 13 cylinders, total 314224 sectors. Note that total sectors is one higher than the logical block the error message is complaining about. Is it as simple as to find the script under the ramdisk part of bootup that sets up zram0, and decreasing the number of sectors? Thank you and best regards, Kenneth Parker, Seattle, WA -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
*** This bug is a duplicate of bug 1215513 *** https://bugs.launchpad.net/bugs/1215513 I also posted comments in Bug #1215513. I got a workaround there: service zram-config stop. I posted a question about what script (probably in the ramdisk portion of the boot) sets up zram0, so I can possibly edit it. Alternatively, the fix for #1215513 may fix this script, but I'm too much in production to try development kernels. I've signed up for email updates for both this and issue #1215513, so hopefully, I'm covered, when the fix gets to the stable 12.0.4 LTS version. Thank you and best regards, Kenneth Parker, Seattle, WA -- I'm a Troubleshooter. I look for Trouble and Shoot it! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
*** This bug is a duplicate of bug 1215513 *** https://bugs.launchpad.net/bugs/1215513 Something to add to prior comment: Ubuntu 12.0.4 Server, running in Text mode (at least for now, as I have not brought up FVWM yet, due to this error. I'm thinking the hard stop in 1215513 is because of attempts to run a desktop. Thank you and best regards, Kenneth Parker, Seattle, WA -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
*** This bug is a duplicate of bug 1215513 *** https://bugs.launchpad.net/bugs/1215513 ** This bug has been marked a duplicate of bug 1215513 System locks up, requires hard reset -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
I am also having this issue on 3.2.0-53-powerpc-smp . Rather than reverting a commit, there is a patch on LKML: https://lkml.org/lkml/2013/8/12/399 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
The bug seems to affect also Kubuntu 13.04 - Kernel version 3.8.0-29 Kubuntu 13.04 - Kernel version 3.8.0-30 No problem with 3.8.0-28 kernel... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
A simple workaround is to blacklist the zram module, and update your initramfs: 1. create a text file /etc/modprobe.d/blacklist-zram.conf: blacklist zram 2. enter command update-initramfs -c -k all After reboot, the zram module will not be loaded anymore. You can also temporarily unload the module: 1. list swap devices: swapon -s - it should produce output similar to: FilenameTypeSizeUsedPriority /dev/zram0 partition 4102348 55052 100 /dev/sda9 partition 4112604 0 -1 2. now turn off swapping on zram0: sudo swapoff /dev/zram0 3. now that module is not used anymore, it can be unloaded: sudo rmmod zram -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
Damian, I believe you refer to 3.2.0-54.82, which is the 12.04 kernel currently in the -proposed pocket. This kernel should already contain the fix for this problem. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
This seems to be a duplicate of bug #1215513. Could the people running Raring try the test kernel here: http://people.canonical.com/~henrix/lp1215513/ (there are 64bits and 32bits kernels) The faulty commit has been reverted in all the kernels (including Precise and Quantal). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
@henrix Is 3.2.0.54 already bug-free (for 12.04)? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
Like Hans, I'm seeing this on 12.04 LTS. linux-image-3.2.0-53-generic- pae seems to enable zram by default, which results in lots of scheduling while atomic errors in syslog and occasional lockups (machine still responds to ping, but not ssh, desktop frozen.) This seems like a pretty critical problem now that it's affecting current LTS.. ** Also affects: linux (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
apport information ** Tags added: apport-collected staging ** Description changed: This is on linux-image-generic-lts-raring (which I recently upgraded to 3.8.0-29; the problem didn't occur before upgrading AFAIR) I see this junk in my dmesg when creating / formatting a zram swap, and then periodically. Then at some point after heavy swapping incidents, the machine locks up. Correlation does not imply causation, but it does waggle its eyebrows suggestively and all that. --- zram: module is from the staging directory, the quality is unknown, you have been warned. zram: num_devices not specified. Using default: 1 zram: Creating 1 devices Adding 1031648k swap on /dev/zram0. Priority:100 extents:1 across:1031648k SS ... Buffer I/O error on device zram0, logical block 257912 [repeated 10 times] ... BUG: scheduling while atomic: rsyslogd/1439/0x0001 Pid: 1439, comm: rsyslogd Tainted: PF WC O 3.8.0-29-generic #42~precise1-Ubuntu [20931.796635] Pid: 1439, comm: rsyslogd Tainted: PF WC O 3.8.0-29-generic #42~precise1-Ubuntu [20931.796638] Call Trace: [20931.796649] [c1619449] __schedule_bug+0x52/0x5e [20931.796653] [c162c265] __schedule+0x575/0x5f0 [20931.796660] [f8439e06] ? zram_make_request+0xe6/0x100 [zram] [20931.79] [c111c38d] ? release_pages+0x18d/0x1c0 [20931.796669] [c162c573] schedule+0x23/0x60 [20931.796673] [c162d0fd] rwsem_down_failed_common+0x9d/0xf0 [20931.796677] [c162d162] rwsem_down_write_failed+0x12/0x20 [20931.796681] [c12f809a] call_rwsem_down_write_failed+0x6/0x8 [20931.796685] [c162ba44] ? down_write+0x24/0x30 [20931.796689] [f8439169] zram_slot_free_notify+0x29/0x50 [zram] [20931.796693] [f8439140] ? zram_stat64_inc+0x30/0x30 [zram] [20931.796700] [c11460bc] swap_entry_free+0xdc/0x170 [20931.796703] [c162d100] ? rwsem_down_failed_common+0xa0/0xf0 [20931.796708] [c1146458] swap_free+0x28/0x40 [20931.796712] [c1134ba0] do_swap_page+0x390/0x6f0 [20931.796717] [c10180f8] ? sched_clock+0x8/0x10 [20931.796721] [c11365aa] handle_pte_fault+0x21a/0x2b0 [20931.796726] [c10451e1] ? kmap_atomic_prot+0xf1/0x120 [20931.796730] [c113746a] handle_mm_fault+0x1fa/0x2d0 [20931.796735] [c1630ad0] __do_page_fault+0x190/0x4f0 [20931.796740] [c12f63bc] ? sprintf+0x1c/0x20 [20931.796744] [c104c132] ? print_time.part.4+0x82/0xc0 [20931.796748] [c1630e30] ? __do_page_fault+0x4f0/0x4f0 [20931.796752] [c1630e3d] do_page_fault+0xd/0x10 [20931.796756] [c162dc17] error_code+0x67/0x6c [20931.796759] [c12f8716] ? __copy_to_user_ll+0x46/0x70 [20931.796763] [c12f8970] copy_to_user+0x40/0x60 [20931.796767] [c104e218] syslog_print+0xc8/0x210 [20931.796770] [c104eae6] do_syslog+0x206/0x390 [20931.796775] [c106d570] ? add_wait_queue+0x50/0x50 [20931.796780] [c11c3680] ? kmsg_poll+0x50/0x50 [20931.796784] [c11c36d0] kmsg_read+0x50/0x60 [20931.796788] [c11b6584] proc_reg_read+0x64/0xa0 [20931.796793] [c116469c] vfs_read+0x8c/0x160 [20931.796797] [c10a898d] ? sys_futex+0xed/0x130 [20931.796801] [c11b6520] ? proc_reg_write+0xa0/0xa0 [20931.796805] [c11647b7] sys_read+0x47/0x80 ... [30855.181542] Write-error on swap-device (251:0:131064) [43457.030155] Write-error on swap-device (251:0:131064) [43705.090381] Buffer I/O error on device zram0, logical block 16383 Anyway, there's a couple of lkml messages related to this Buffer I/O error on device zram0, please investigate ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: linux-image-3.8.0-29-generic 3.8.0-29.42~precise1 ProcVersionSignature: Ubuntu 3.8.0-29.42~precise1-generic 3.8.13.5 Uname: Linux 3.8.0-29-generic i686 NonfreeKernelModules: nvidia ApportVersion: 2.0.1-0ubuntu17.4 Architecture: i386 Date: Tue Aug 27 07:33:37 2013 EcryptfsInUse: Yes MarkForUpload: True ProcEnviron: TERM=rxvt LC_COLLATE=C PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: linux-lts-raring UpgradeStatus: No upgrade log present (probably fresh install) + --- + AlsaVersion: Advanced Linux Sound Architecture Driver Version k3.8.0-29-lowlatency. + ApportVersion: 2.0.1-0ubuntu17.4 + Architecture: i386 + AudioDevicesInUse: + USERPID ACCESS COMMAND + /dev/snd/controlC0: muresan 29305 F pulseaudio + /dev/snd/pcmC0D0p: muresan 29305 F...m pulseaudio + /dev/snd/controlC1: muresan 29305 F pulseaudio + CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found. + Card0.Amixer.info: + Card hw:0 'Intel'/'HDA Intel at 0xfebfc000 irq 44' +Mixer name : 'SigmaTel STAC9205' +Components : 'HDA:838476a0,102801f1,00100204 HDA:14f12c06,14f1000f,0010' +Controls : 26 +Simple ctrls : 12 + Card1.Amixer.info: + Card hw:1 'USB'/'E-MU Systems, Inc. E-MU 0202 | USB at usb-:00:1d.0-2, full speed' +Mixer name : 'USB Mixer' +Components : 'USB041e:3f02' +Controls : 4 +
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
Ah, I didn't know about apport-collect, I've added my data as Bug #1223273, and marked it as a duplicate .. ** Changed in: linux (Ubuntu) Status: Incomplete = Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
This bug also occurs on linux-lts-quantal, I think (I remember booting to a lts-quantal kernel after seeing the raring bug). There was a backport to zram on both branches that is causing this. Note that in Bug #1218278, Tim Gardner (timg-tpi) wrote at #19: There will be a linux-lts-saucy shortly after 13.10 is released.; anyway, I'm marking that one as a duplicate. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
meanwhile: rolling back to kernel 3.2.0.52 - can't wait 'til release of 13.10 - error is critical -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
@danmbox: It is. So another fix is just swapoff, right? It doesn't help with error messages on boot, but should prevent lock-ups when system is already on. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-raring/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
@damian-sawicki: yes, but once such memory errors DO occur, I think your system is basically compromised; you don't know when it will crash (*) and you don't know what else gets corrupted before the lock-up (why not filesystem errors, security etc?). That's why I would cut this at the root. (*) In practice, of course, the system seems to actually crash when under heavy swapping the erroneous block gets used (possibly when the page is swapped back into memory?) But this is like overclocking, you never know what parts of the system might break. We need to figure out why there aren't more people affected by this issue and how to get developers involved. Perhaps we should mark this as a security problem (because memory errors usually DO lead to security problems, even if writing an exploit could be hard) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-raring/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
@all: dmesg | grep zram [1.820314] zram: module is from the staging directory, the quality is unknown, you have been warned. [1.820596] zram: num_devices not specified. Using default: 1 [1.820643] zram: Creating 1 devices ... [1.864606] Adding 1922976k swap on /dev/zram0. Priority:100 extents:1 across:1922976k SS [ 30.459194] Buffer I/O error on device zram0, logical block 480744 [ 30.459234] Buffer I/O error on device zram0, logical block 480744 [ 30.459313] Buffer I/O error on device zram0, logical block 480744 [ 30.459349] Buffer I/O error on device zram0, logical block 480744 [ 30.459384] Buffer I/O error on device zram0, logical block 480744 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-raring/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
@all: after today's updating kernel 3.2.0.52 to 3.2.0.53 there is this message (about 5 times) in syslog: kernel: [ 30.459194] Buffer I/O error on device zram0, logical block 480744 ... starting the old kernel 3.2.0.52 shows no message like this. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-raring/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
@all: sorry, i forgot my DistroRelease: Ubuntu 12.04 LTS -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-raring/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
@danmbox: Still having the issue after dpkg --purge. I'll try your method with breaking the modules. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-raring/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
The way to list your swaps is swapon -s. If zram0 is listed, something still enables it. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-raring/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
@damian-sawicki: a lot of people have zram due to the zram-config package, which you must remove with dpkg --purge zram-config (otherwise it won't go away completely). But in my case zram *still* starts up, and I can't track what sets it up. I think the easy solution is to break the zram modules (e.g. rename zram.ko to zram.ko.save in the appropriate /lib/modules directory) Of course, it would be great to get working zram again. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-raring/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
Bug #1218278 might be a duplicate (though it doesn't talk about lock- ups). Apparently this is fixed in 3.11, though I don't see how this helps with raring and linux-lts-raring. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-raring/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
@damian-sawicki: do you also get lock-ups? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-raring/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
The same here on Kernel Linux 3.2.0-53-generic-pae dmesg | grep zram [1.324402] zram: module is from the staging directory, the quality is unknown, you have been warned. [1.324654] zram: num_devices not specified. Using default: 1 [1.324656] zram: Creating 1 devices ... [1.443281] Adding 2060268k swap on /dev/zram0. Priority:100 extents:1 across:2060268k SS [ 25.531955] Buffer I/O error on device zram0, logical block 515067 [ 25.531974] Buffer I/O error on device zram0, logical block 515067 [ 25.532060] Buffer I/O error on device zram0, logical block 515067 [ 25.532076] Buffer I/O error on device zram0, logical block 515067 [ 25.532091] Buffer I/O error on device zram0, logical block 515067 [ 25.532107] Buffer I/O error on device zram0, logical block 515067 [ 25.532122] Buffer I/O error on device zram0, logical block 515067 [ 25.532158] Buffer I/O error on device zram0, logical block 515067 [ 25.532174] Buffer I/O error on device zram0, logical block 515067 [ 25.532193] Buffer I/O error on device zram0, logical block 515067 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-raring/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
@danmbox Yes. I don't know if they are related to the above logs (often displayed on boot - btw. for some time I don't have ubuntu logo and animation on boot, but just text Ubuntu 12.04 and 4 sparkling dots), but both - errors about zram0 and lock-ups - started recently. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-raring/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
@variona So, no lock-ups after downgrading? You should also test the NEWER kernel WITHOUT enabling zram and see if the crashes still occur. I've run 3.8.0-29 WITHOUT zram for almost a day (not quite enough to give it a clean pass) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-raring/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
After multiple machine lock downs (no way to ping it) switching back to 3.5.0-37-generic results in: dmesg | grep zram [0.829615] zram: module is from the staging directory, the quality is unknown, you have been warned. [0.829907] zram: num_devices not specified. Using default: 1 [0.829909] zram: Creating 1 devices ... [0.966127] Adding 1032592k swap on /dev/zram0. Priority:100 extents:1 across:1032592k SS -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-raring/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
Status changed to 'Confirmed' because the bug affects multiple users. ** Changed in: linux-lts-raring (Ubuntu) Status: New = Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-raring/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
I also experienced the complete machine lock up. dmesg | grep zram [0.842160] zram: module is from the staging directory, the quality is unknown, you have been warned. [0.842454] zram: num_devices not specified. Using default: 1 [0.842457] zram: Creating 1 devices ... [1.015211] Adding 1032592k swap on /dev/zram0. Priority:100 extents:1 across:1032592k SS [ 20.325220] Buffer I/O error on device zram0, logical block 258148 [ 20.325241] Buffer I/O error on device zram0, logical block 258148 [ 20.325339] Buffer I/O error on device zram0, logical block 258148 [ 20.325355] Buffer I/O error on device zram0, logical block 258148 [ 20.325370] Buffer I/O error on device zram0, logical block 258148 [ 20.325385] Buffer I/O error on device zram0, logical block 258148 [ 20.325400] Buffer I/O error on device zram0, logical block 258148 [ 20.325446] Buffer I/O error on device zram0, logical block 258148 [ 20.325461] Buffer I/O error on device zram0, logical block 258148 [ 20.325483] Buffer I/O error on device zram0, logical block 258148 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-raring/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1217189] Re: Buffer I/O error on device zram0 (possibly causing complete machine lockup)
Affects me with 3.5.0-39-generic Kernel on an AMD64X2 machine. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1217189 Title: Buffer I/O error on device zram0 (possibly causing complete machine lockup) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-raring/+bug/1217189/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
