** Tags added: kernel-bug-exists-upstream lucid ** Description changed:
Summary: Ubuntu 10.04 hangs when the CPU scaling governor is set to "ondemand", "conservative", or "userspace" at 1000 MHz and 900 MHz. Other freqs don't hang. - Motherboard: Jetway NF77-N1G6-LF + Motherboard: Jetway NF77-N1G6-LF CPU: VIA Nano processor L2200@1600MHz Ubuntu installer: Ubuntu 10.04.1 64-bit alternate Test setup: - Install Ubuntu 10.04.1 64-bit from an alternate CD or an alternate USB stick. - As soon as you reach the login screen, quickly press CTRL+ALT+F6 to go to a terminal, then quickly type "sudo chmod -x /etc/init.d/ondemand". The quickly type "sudo reboot" to reboot the computer. This will disable the ondemand script from changing the cpu governor on the next boot. - On the next boot, log in normally, then update all packages from the Update Manager, and reboot if necessary. - Launch a Terminal window. All test cmds will be executed from this directory: $ cd /sys/devices/system/cpu/cpu0/cpufreq - Open a 2nd Terminal window and execute this so you can watch the CPU freq. $ watch -n0 "cat /proc/cpuinfo" Test: - Check the available and current governor, the available freqs, and the scaling driver. $ cat scaling_available_governors conservative ondemand userspace powersave performance - $ cat scaling_governor + $ cat scaling_governor performance - $ cat scaling_available_frequencies - 1600000 1400000 1300000 1200000 1100000 1000000 900000 800000 + $ cat scaling_available_frequencies + 1600000 1400000 1300000 1200000 1100000 1000000 900000 800000 $ cat scaling_driver acpi-cpufreq - Try powersave. The CPU drops to 800 MHz. No hang. $ echo -n powersave | sudo tee scaling_governor - Try ondemand. Ubuntu hangs after I press enter. $ echo -n ondemand | sudo tee scaling_governor - Reboot, then try conservative. Ubuntu hangs a moment after I press enter. I observed the CPU freq dropping to 1400 MHz, then 1300 MHz, 1200 MHz, 1100 MHz, then hang. $ echo -n conservative | sudo tee scaling_governor - Reboot, then try userspace. No hang at this point. CPU freq is 1600 MHz. $ echo -n userspace | sudo tee scaling_governor - Manually change the CPU freq. These changes don't hang. The CPU freq is correctly changed to the specified freq. $ echo -n 1400000 | sudo tee scaling_setspeed $ echo -n 1300000 | sudo tee scaling_setspeed $ echo -n 1200000 | sudo tee scaling_setspeed $ echo -n 1100000 | sudo tee scaling_setspeed - Now try 1000 MHz. This hangs instantly. $ echo -n 1000000 | sudo tee scaling_setspeed - Reboot, try 900 MHz. This hangs instantly. $ echo -n 900000 | sudo tee scaling_setspeed - Reboot, try 800 MHz. CPU freq changed to 800 Mhz. No hang. $ echo -n 800000 | sudo tee scaling_setspeed - END OF TEST - - Other notes: - - Some other info about my installation. - - $ uname -srvmpio - Linux 2.6.32-32-generic #62-Ubuntu SMP Wed Apr 20 21:52:38 UTC 2011 x86_64 unknown unknown GNU/Linux - - $ lsb_release -rd - Description: Ubuntu 10.04.2 LTS - Release: 10.04 - - $ apt-cache policy linux-image-generic - linux-image-generic: - Installed: 2.6.32.32.38 - Candidate: 2.6.32.32.38 - Version table: - *** 2.6.32.32.38 0 - 500 http://us.archive.ubuntu.com/ubuntu/ lucid-updates/main Packages - 500 http://security.ubuntu.com/ubuntu/ lucid-security/main Packages - 100 /var/lib/dpkg/status - 2.6.32.21.22 0 - 500 http://us.archive.ubuntu.com/ubuntu/ lucid/main Packages - - If the CPU is already at 800 MHz, "ondemand" sometimes doesn't hang instantly. My guess is that the hang occurs when a process in the background pushes the CPU to 1600 MHz, then ondemand hangs when it tries to quickly scale the CPU freq back down to 800 MHz. - I have a different motherboard that also has a VIA Nano L2200 CPU. The board is a VIA VB8001. There is no problem with ondemand on that board because "/sys/devices/system/cpu/cpu0/cpufreq" doesn't even exist. I have no idea why. - --- + --- AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 1.23-0ubuntu4 Architecture: amd64 ArecordDevices: - **** List of CAPTURE Hardware Devices **** - card 0: VT82xx [HDA VIA VT82xx], device 0: VT1708B Analog [VT1708B Analog] - Subdevices: 2/2 - Subdevice #0: subdevice #0 - Subdevice #1: subdevice #1 + **** List of CAPTURE Hardware Devices **** + card 0: VT82xx [HDA VIA VT82xx], device 0: VT1708B Analog [VT1708B Analog] + Subdevices: 2/2 + Subdevice #0: subdevice #0 + Subdevice #1: subdevice #1 AudioDevicesInUse: - USER PID ACCESS COMMAND - /dev/snd/controlC0: lee 1434 F.... xfce4-volumed - lee 1440 F.... pulseaudio + USER PID ACCESS COMMAND + /dev/snd/controlC0: lee 1434 F.... xfce4-volumed + lee 1440 F.... pulseaudio CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: - Card hw:0 'VT82xx'/'HDA VIA VT82xx at 0xdfff8000 irq 68' - Mixer name : 'VIA VT1708B 8-Ch' - Components : 'HDA:1106e721,16f307f5,00100100' - Controls : 27 - Simple ctrls : 15 + Card hw:0 'VT82xx'/'HDA VIA VT82xx at 0xdfff8000 irq 68' + Mixer name : 'VIA VT1708B 8-Ch' + Components : 'HDA:1106e721,16f307f5,00100100' + Controls : 27 + Simple ctrls : 15 DistroRelease: Ubuntu 11.10 HibernationDevice: RESUME=UUID=af61867e-a9e1-4201-94ca-bcb9d713183a InstallationMedia: Xubuntu 11.04 "Natty Narwhal" - Release amd64 (20110426.1) IwConfig: - lo no wireless extensions. - - eth0 no wireless extensions. + lo no wireless extensions. + + eth0 no wireless extensions. Lsusb: - Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub - Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub - Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub - Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub - Bus 003 Device 002: ID 045e:0095 Microsoft Corp. IntelliMouse Explorer 4.0 (IntelliPoint) + Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub + Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub + Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub + Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub + Bus 003 Device 002: ID 045e:0095 Microsoft Corp. IntelliMouse Explorer 4.0 (IntelliPoint) MachineType: VIA Technologies Ltd. VX800 Package: linux (not installed) ProcEnviron: - PATH=(custom, no user) - LANG=en_US.UTF-8 - SHELL=/bin/bash + PATH=(custom, no user) + LANG=en_US.UTF-8 + SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-17-generic root=UUID=5b5aaf54-85cf-4eb6-848c-8745288f5ce7 ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 3.0.0-17.30-generic 3.0.22 RelatedPackageVersions: - linux-restricted-modules-3.0.0-17-generic N/A - linux-backports-modules-3.0.0-17-generic N/A - linux-firmware 1.60 + linux-restricted-modules-3.0.0-17-generic N/A + linux-backports-modules-3.0.0-17-generic N/A + linux-firmware 1.60 RfKill: - + Tags: oneiric Uname: Linux 3.0.0-17-generic x86_64 UpgradeStatus: Upgraded to oneiric on 2012-04-01 (0 days ago) UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare dmi.bios.date: 12/03/2008 dmi.bios.vendor: Phoenix Technologies, LTD dmi.bios.version: 6.00 PG dmi.board.name: VX800 dmi.board.vendor: VIA Technologies Ltd. dmi.board.version: 1.0 dmi.chassis.type: 3 dmi.chassis.vendor: VIA Technologies Ltd. dmi.chassis.version: VX800 dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvr6.00PG:bd12/03/2008:svnVIATechnologiesLtd.:pnVX800:pvr1.0:rvnVIATechnologiesLtd.:rnVX800:rvr1.0:cvnVIATechnologiesLtd.:ct3:cvrVX800: dmi.product.name: VX800 dmi.product.version: 1.0 dmi.sys.vendor: VIA Technologies Ltd. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/805205 Title: VIA Nano hangs on some CPU scaling governors To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/805205/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
