Public bug reported: I first discovered this problem in Mint 18.1 Cinnamon (64-bit) and Mint 18 XFCE (64-bit). I enabled Glamor (and thus, it seemed DRI3) and tried turning off smooth scrolling and/or hardware support in Firefox, but to no great avail. Interestingly, scrolling worked nice and smooth with a Geforce FX5200, 128MiB - an older, inferior card running on nouveau.
I installed Ubuntu 16.10 to try with the latest software and drivers..and the problem still remains. Scrolling is stuttering badly if scrolling in a full screen. Scrolling the Facebook feed the problem is less, but noticeble. Youtube-videos play abhorrently slow. ProblemType: Bug DistroRelease: Ubuntu 16.10 Package: xserver-xorg-video-radeon 1:7.7.1-1 ProcVersionSignature: Ubuntu 4.8.0-30.32-generic 4.8.6 Uname: Linux 4.8.0-30-generic x86_64 .tmp.unity_support_test.0: ApportVersion: 2.20.3-0ubuntu8.2 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: compiz CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0' CompositorUnredirectFSW: true CurrentDesktop: Unity Date: Thu Dec 15 23:08:34 2016 DistUpgraded: Fresh install DistroCodename: yakkety DistroVariant: ubuntu ExtraDebuggingInterest: Yes GraphicsCard: Advanced Micro Devices, Inc. [AMD/ATI] RV730 [Radeon HD 4600 AGP Series] [1002:9495] (prog-if 00 [VGA controller]) Subsystem: Gigabyte Technology Co., Ltd Radeon HD 4650 AGP [1458:0028] InstallationDate: Installed on 2016-12-15 (0 days ago) InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2) MachineType: To Be Filled By O.E.M. 775Dual-VSTA ProcEnviron: LANGUAGE=sv_FI:sv PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=sv_FI.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-30-generic root=UUID=6a50b165-7f18-4e97-a857-ed3fea27adfa ro quiet splash vt.handoff=7 SourcePackage: xserver-xorg-video-ati UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 02/26/2008 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: P3.10 dmi.board.name: 775Dual-VSTA dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP3.10:bd02/26/2008:svnToBeFilledByO.E.M.:pn775Dual-VSTA:pvrToBeFilledByO.E.M.:rvn:rn775Dual-VSTA:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: dmi.product.name: 775Dual-VSTA dmi.product.version: To Be Filled By O.E.M. dmi.sys.vendor: To Be Filled By O.E.M. version.compiz: compiz 1:0.9.13.0+16.10.20160818.2-0ubuntu2 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.70-1 version.libgl1-mesa-dri: libgl1-mesa-dri 12.0.3-1ubuntu2 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 12.0.3-1ubuntu2 version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-1ubuntu6.1 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.2-1ubuntu1 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.1-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160706-1ubuntu1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-2 xserver.bootTime: Thu Dec 15 22:41:56 2016 xserver.configfile: default xserver.devices: input Power Button KEYBOARD, id 6 input Power Button KEYBOARD, id 7 input Dell Dell Smart Card Reader Keyboard KEYBOARD, id 8 input Logitech M315/235/317 MOUSE, id 9 xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.version: 2:1.18.4-1ubuntu6.1 xserver.video_driver: radeon ** Affects: xserver-xorg-video-ati (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug compiz-0.9 ubuntu yakkety -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1650381 Title: Slow scrolling in Firefox and slow Youtube-playback with Radeon RV730 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/1650381/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs