Xorg session freeze (radeon stalled)

[Joseph Maillardet]

Cosmic updated with new xorg packages

Login to « Ubuntu » session : show me a screen parasite checkerboard for some second and finally display my desktop, but it was frozen. The second in the clock don't move. every 5 to 10 second the screen go black and came back, but time in clock is at the same position that before screen go black.

Sometime, the display go to text terminal and display many line of « radeon stalled for xxxx seconds ... ».

Login to « Ubuntu on Wayland » work good.

ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: xserver-xorg-video-radeon 1:18.0.1-1build1
ProcVersionSignature: Ubuntu 4.17.0-7.8-generic 4.17.12
Uname: Linux 4.17.0-7-generic x86_64
ApportVersion: 2.20.10-0ubuntu7
Architecture: amd64
Date: Wed Aug 22 10:54:02 2018
DistUpgraded: 2018-05-17 11:46:01,986 DEBUG Running PostInstallScript: './xorg_fix_proprietary.py'
DistroCodename: cosmic
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] Turks PRO [Radeon HD 7570] [1002:675d] (prog-if 00 [VGA controller])
   Subsystem: Dell Turks PRO [Radeon HD 7570] [1028:2b20]
MachineType: Dell Inc. OptiPlex 390
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.17.0-7-generic root=UUID=87f92239-240d-4213-ad2e-2c94b76ead3a ro splash quiet vt.handoff=1
SourcePackage: xserver-xorg-video-ati
UpgradeStatus: Upgraded to cosmic on 2018-05-17 (96 days ago)
dmi.bios.date: 10/14/2013
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A11
dmi.board.name: 0M5DCD
dmi.board.vendor: Dell Inc.
dmi.board.version: A02
dmi.chassis.type: 3
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA11:bd10/14/2013:svnDellInc.:pnOptiPlex390:pvr01:rvnDellInc.:rn0M5DCD:rvrA02:cvnDellInc.:ct3:cvr:
dmi.product.name: OptiPlex 390
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.93-1
version.libgl1-mesa-dri: libgl1-mesa-dri 18.1.5-1ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 18.1.5-1ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.20.0-3ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1build1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1build1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-3