I built the next test kernel, up to the following commit: 1886e5d2c694e7fb59434c717e704e7fd8475d2e
The test kernel can be downloaded from: http://kernel.ubuntu.com/~jsalisbury/lp1107150 Can you test that kernel and report back if it has the bug or not. I will build the next test kernel based on your test results. -- 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/1107150 Title: B75 Chipset I/O Problems Status in “linux” package in Ubuntu: Confirmed Bug description: I built a new system and installed Ubuntu 12.10. The system has the following specifications: Samsung 840 Pro 128 GB Gigabyte P75-D3 Intel i7 3770 32 GB Ram Western Digital 1 TB Black (mounted as /home) Western Digital 3 TB Green (mounted as /media/data_drive) The initial Ubuntu 12.10 install took almost 6 hours as transfer rates were very slow. After reboot everything appeared very fast. However when I did an "apt-get update" the download took 20 seconds and the processing of lists took 19 minutes. I had 12.10 installed on another computer which was working great (older Althon system) so I installed the drive and tested the new machine. It suffered the same performance problems. I installed Windows 7 and performed speeds tests, it reported great results. I installed 12.04 onto the 1 TB drive and it did not suffer the same performance problems. Everything ran great. I then upgraded 12.10 to 13.04 (January 27, 2013) and it too suffered from the performance issue. It appears that a change between 12.04 to 12.10 impacts AHCI based systems specifically running the Intel B75 chipset. I am not certain but I think that either the motherboard is misrepresenting something (that 12.04 ignores but it impacts 12.10) or the kernel is not detecting the system correctly. I created a couple of pastebins with data collected: 12.10 Install: http://pastebin.ubuntu.com/1561660/ 12.04 Live Disk (was checked against installed version and data is mostly the same): http://paste.ubuntu.com/1565140/ I have a thread on the ubuntu forums that may provide additional details: http://ubuntuforums.org/showthread.php?t=2104709 I also started an e-mail thread to the ubuntu-users mailing list: http://ubuntu.5.n6.nabble.com/Seeking-Help-td5010422.html I have done a lot of troubleshooting and I feel that the problem must either be the kernel or the bios misrepresenting information. In either case I am stuck without any idea of where to go next with the debuging and diagnoses path. If any additional information needs to be collected, please let me know and I will work to assist. --- AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 2.0.1-0ubuntu17.1 Architecture: i386 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: bakers 1729 F.... pulseaudio /dev/snd/controlC0: bakers 1729 F.... pulseaudio CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found. Card0.Amixer.info: Card hw:0 'PCH'/'HDA Intel PCH at 0xf7110000 irq 45' Mixer name : 'Realtek ALC887-VD' Components : 'HDA:10ec0887,1458a002,00100302' Controls : 39 Simple ctrls : 20 Card1.Amixer.info: Card hw:1 'NVidia'/'HDA NVidia at 0xf7080000 irq 17' Mixer name : 'Nvidia GPU 42 HDMI/DP' Components : 'HDA:10de0042,14583553,00100100' Controls : 18 Simple ctrls : 3 DistroRelease: Ubuntu 12.04 IwConfig: lo no wireless extensions. eth0 no wireless extensions. MachineType: Gigabyte Technology Co., Ltd. To be filled by O.E.M. MarkForUpload: True NonfreeKernelModules: nvidia Package: linux (not installed) ProcEnviron: LANGUAGE=en_CA:en TERM=xterm PATH=(custom, no user) LANG=en_CA.UTF-8 SHELL=/bin/bash ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-36-generic-pae root=UUID=4f30252c-fa56-4d53-be78-117cddab55f4 ro quiet splash ProcVersionSignature: Ubuntu 3.2.0-36.57-generic-pae 3.2.35 RelatedPackageVersions: linux-restricted-modules-3.2.0-36-generic-pae N/A linux-backports-modules-3.2.0-36-generic-pae N/A linux-firmware 1.79.1 RfKill: StagingDrivers: mei Tags: precise running-unity staging Uname: Linux 3.2.0-36-generic-pae i686 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo dmi.bios.date: 08/21/2012 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: F9 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: P75-D3 dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF9:bd08/21/2012:svnGigabyteTechnologyCo.,Ltd.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnP75-D3:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.: dmi.product.name: To be filled by O.E.M. dmi.product.version: To be filled by O.E.M. dmi.sys.vendor: Gigabyte Technology Co., Ltd. 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