Bartłomiej Żogała, this bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? If so, could you please test for this with the latest development release of Ubuntu? ISO CD images are available from http://cdimage.ubuntu.com/releases/ .
If it remains an issue, could you please run the following command in the development release from a Terminal (Applications->Accessories->Terminal), as it will automatically gather and attach updated debug information to this report: apport-collect -p linux <replace-with-bug-number> Also, could you please test the latest upstream kernel available? It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please do not test the kernel in the daily folder, but the one all the way at the bottom. Once you've tested the upstream kernel, please remove the 'needs-upstream- testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text. As well, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream', and comment as to why specifically you were unable to test it. Please let us know your results. Thanks in advance. Helpful Bug Reporting Links: https://help.ubuntu.com/community/ReportingBugs#Bug_Reporting_Etiquette https://help.ubuntu.com/community/ReportingBugs#A3._Make_sure_the_bug_hasn.27t_already_been_reported https://help.ubuntu.com/community/ReportingBugs#Adding_Apport_Debug_Information_to_an_Existing_Launchpad_Bug https://help.ubuntu.com/community/ReportingBugs#Adding_Additional_Attachments_to_an_Existing_Launchpad_Bug ** Description changed: Every tty line lasts 20x times slower than on previous config. System is - unusable. Now I started it by passing mem=3GB option to kernel in grub. + unusable. + + WORKAROUND: Now I started it by passing mem=3GB option to kernel in + grub. ProblemType: Bug DistroRelease: Ubuntu 11.10 Package: linux-image-3.0.0-12-generic 3.0.0-12.20 ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4 Uname: Linux 3.0.0-12-generic x86_64 NonfreeKernelModules: nvidia AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 1.23-0ubuntu3 Architecture: amd64 AudioDevicesInUse: - USER PID ACCESS COMMAND - /dev/snd/controlC0: nusch 6342 F.... pulseaudio + USER PID ACCESS COMMAND + /dev/snd/controlC0: nusch 6342 F.... pulseaudio Card0.Amixer.info: - Card hw:0 'Intel'/'HDA Intel at 0xe3d00000 irq 45' - Mixer name : 'Nvidia MCP77/78 HDMI' - Components : 'HDA:10ec0888,17aa3d78,00100202 HDA:10573055,17aa3d7d,00100700 HDA:10de0006,10de0101,00100000' - Controls : 36 - Simple ctrls : 20 + Card hw:0 'Intel'/'HDA Intel at 0xe3d00000 irq 45' + Mixer name : 'Nvidia MCP77/78 HDMI' + Components : 'HDA:10ec0888,17aa3d78,00100202 HDA:10573055,17aa3d7d,00100700 HDA:10de0006,10de0101,00100000' + Controls : 36 + Simple ctrls : 20 Date: Sun Oct 16 13:17:55 2011 EcryptfsInUse: Yes MachineType: Lenovo INVALID ProcEnviron: - LANGUAGE=pl_PL - LANG=pl_PL.utf8 - SHELL=/bin/bash + LANGUAGE=pl_PL + LANG=pl_PL.utf8 + SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.0.0-12-generic root=UUID=4fa8b5a2-df36-44bd-9e2b-0e4982840edf ro nomodeset crashkernel=384M-2G:64M,2G-:128M mem=3G vt.handoff=7 RelatedPackageVersions: - linux-restricted-modules-3.0.0-12-generic N/A - linux-backports-modules-3.0.0-12-generic N/A - linux-firmware 1.60 + linux-restricted-modules-3.0.0-12-generic N/A + linux-backports-modules-3.0.0-12-generic N/A + linux-firmware 1.60 SourcePackage: linux UpgradeStatus: Upgraded to oneiric on 2011-10-15 (1 days ago) WpaSupplicantLog: - + dmi.bios.date: 06/18/2009 dmi.bios.vendor: Lenovo dmi.bios.version: 10CN43WW dmi.board.asset.tag: Lenovo Assert TAG dmi.board.name: INVALID dmi.board.vendor: Lenovo dmi.board.version: 10CN38WW dmi.chassis.asset.tag: Lenovo Assert TAG dmi.chassis.type: 10 dmi.chassis.vendor: Lenovo dmi.chassis.version: 10CN43WW dmi.modalias: dmi:bvnLenovo:bvr10CN43WW:bd06/18/2009:svnLenovo:pnINVALID:pvrLenovoIdeaPadY530:rvnLenovo:rnINVALID:rvr10CN38WW:cvnLenovo:ct10:cvr10CN43WW: dmi.product.name: INVALID dmi.product.version: Lenovo IdeaPad Y530 dmi.sys.vendor: Lenovo ** Changed in: linux (Ubuntu) Importance: Undecided => Low ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/875655 Title: Kernel extremally slow after upgrade from 4 to 8GB RAM on x86_64 machine, "RCU detected CPU0 stall" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/875655/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
