[radeon] Screen flickers and small moving artifacts

[Scott Palmer]

This is likely a wayland issue. I can't bear the tearing if I don't use wayland.

I get screen flickering (approximately every 5 seconds) and some windows seem to bring up some mis-colored moving artifacts that clear when the window is closed.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: xorg 1:7.7+19ubuntu5
ProcVersionSignature: Ubuntu 4.15.0-12.13-generic 4.15.7
Uname: Linux 4.15.0-12-generic x86_64
ApportVersion: 2.20.8-0ubuntu10
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Fri Mar 16 20:07:47 2018
DistUpgraded: Fresh install
DistroCodename: bionic
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] Barts PRO [Radeon HD 6850] [1002:6739] (prog-if 00 [VGA controller])
   Subsystem: XFX Pine Group Inc. Barts PRO [Radeon HD 6850] [1682:3112]
InstallationDate: Installed on 2018-03-17 (0 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180310)
MachineType: System manufacturer System Product Name
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-12-generic root=UUID=7cf929d1-3748-4cac-bd67-e25c2fdf0038 ro quiet splash vt.handoff=1
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
XorgLogOld:

dmi.bios.date: 07/22/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1807
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P7P55D DELUXE
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1807:bd07/22/2010:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP7P55DDELUXE:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.family: To Be Filled By O.E.M.
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.90-1
version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.0~rc4-1ubuntu3
version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.0~rc4-1ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.10.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2

[Scott Palmer (skewty)]

I believe I have corrected this by changing my refresh rate from 59.99 Hz to 59.86 Hz.

Is this a requirement for 2560x1600 resolution on DL-DVI? Should this perhaps be communicated upstream to someone who knows better?

[Narrow Security (seolinks786)]

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