** Description changed: Dear Ones, - This situation is permanent. It happens in both Ubuntu and Ubuntu 2D. + When frequency scaling is activated (more details below) the system has + short freezes, short lags, short "time-outs". They vary in length and + can be as long as about 1 second. Here's a video(1). + + It doesn't matter whether it is Unity or Unity 2D. + + Windows 7 runs smooth, without the stuttering / framedrop problem in my + LCD's Maximum resolution of 1280x1024. + + Testing with a dedicated PCI Express GPU (Radeon R300 if I remember + correctly), the stuttering persisted. + + Here's some testing with different governors: + performance: smoothness goodness + ondemand: the stuttering as demonstrated in the video + conservative: stuttering reduced to seemingly about 10% compared to ondemand + powersave: stuttering increase seemingly to about five times more than with ondemand + + When using ondemand, raising minimum frequencies results in less + stuttering. Raising the minimum frequency of all four cores to the + second step, 1.7GHz, helps a lot and and raising it to 2.5GHz results no + stuttering. This is under the limited strain of dragging windows around + in 1280x1024 in compiz, Ubuntu 11.10. I've also tested 2012-02-06 image of precise. Still occurs. - For example, when I drag windows around, there are framedrops. Is the - term framedrops clear? The movement is jumpy. As if frames are skipped - in the rendering of the display. So it seems that the window that I'm - moving is jumping instead o smooth movement. + It didn't happen when my CPU was an AMD Sempron 140. As soon as I + switched to the AMD FX-4100 CPU this started. - The stuttering seems to be generated by CPU activity, I've noticed. + As per Gigabyte's instructions(2), in order to have support for this + CPU, I upgraded the BIOS from the "F2" version to the "F3" version + before replacing the CPU (flashrom FTW!) If it is necessary, I can still + put in the old Sempron 140 CPU for testing. - Funny thing is that it didn't happen when my CPU was an AMD Sempron 140. - As soon as I switched to the AMD FX-4100 CPU this started. - - I don't know if this is X.org, radeon or maybe linux... I apologize and - I will let you decide. + More stuff I tried since replacing the CPU: I have played with BIOS + settings - trying different configurations. I also replaced to a new, + more adequate PSU. I also tried different RAM sticks and different + amounts of them (1, 2 and 4 sticks). Thanks and blessings, + Shahar - ProblemType: Bug - DistroRelease: Ubuntu 11.10 + Links: + 1. http://bit.ly/xDOZF3 (on Google Docs) + 2. http://www.gigabyte.com/support-downloads/cpu-support-popup.aspx?pid=3817 + + ProblemType: BugDistroRelease: Ubuntu 11.10 Package: xorg 1:7.6+7ubuntu7.1 ProcVersionSignature: Ubuntu 3.0.0-15.26-generic 3.0.13 Uname: Linux 3.0.0-15-generic x86_64 .tmp.unity.support.test.0: - + ApportVersion: 1.23-0ubuntu4 Architecture: amd64 CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,resize,fade,unitymtgrabhandles,scale,session,unityshell] CompositorRunning: None Date: Mon Feb 6 23:38:39 2012 DistUpgraded: Log time: 2011-10-16 02:49:10.693391 DistroCodename: oneiric DistroVariant: ubuntu EcryptfsInUse: Yes ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu GraphicsCard: - ATI Technologies Inc RS880 [Radeon HD 4250] [1002:9715] (prog-if 00 [VGA controller]) - Subsystem: Giga-byte Technology Device [1458:d000] - InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007) + ATI Technologies Inc RS880 [Radeon HD 4250] [1002:9715] (prog-if 00 [VGA controller]) + Subsystem: Giga-byte Technology Device [1458:d000]InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007) MachineType: Gigabyte Technology Co., Ltd. GA-880GMA-USB3 - ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-15-generic root=UUID=57641e34-8b71-4e2e-9324-ff40ca1bc82a ro quiet splash vt.handoff=7 - SourcePackage: xorg + ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-15-generic root=UUID=57641e34-8b71-4e2e-9324-ff40ca1bc82a ro quiet splash vt.handoff=7SourcePackage: xorg UpgradeStatus: Upgraded to oneiric on 2011-10-16 (113 days ago) dmi.bios.date: 10/20/2011 dmi.bios.vendor: Award Software International, Inc. dmi.bios.version: F3 dmi.board.name: GA-880GMA-USB3 dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF3:bd10/20/2011:svnGigabyteTechnologyCo.,Ltd.:pnGA-880GMA-USB3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-880GMA-USB3:rvr:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr: dmi.product.name: GA-880GMA-USB3 dmi.sys.vendor: Gigabyte Technology Co., Ltd. version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu6 version.ia32-libs: ia32-libs 20090808ubuntu26 version.libdrm2: libdrm2 2.4.26-1ubuntu1 version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu3 version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu7.1 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20110811.g93fc084-0ubuntu1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.901-1ubuntu2.1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1
-- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/927918 Title: Frequency scaling causes whole-system micro-freezes / Lags / stutters with AMD Zambezi (Bulldozer) CPU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/927918/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
