[amdgpu] Xorg freeze

[just4you]

Hello,
Thanks for looking forward to fix problems.
I re-installed ubuntu 18.04LTS & 18.10 4 times and every time it's just get worse! So this time I did my best, And I didn't re-install ubuntu I just changed gdm to lightdm < after looking for the problem > I notice that Ubuntu + Ubuntu On WayLand is not working at all, So I logged into GNOME and It's working perfectly.
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<Toshiba Satellite L-50, Intel Core i7, AMD Radeon>
Problems are:
1- Freezing for the whole system, Even music Freeze Ex. Before Freezing:Lalala | After: lllllllllllll
2- Black Screen With A lot of [OK] { I guess that ubuntu-desktop couldn't boot up }
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That's it
Best Wishes,
Just4you.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: xorg 1:7.7+19ubuntu7
ProcVersionSignature: Ubuntu 4.15.0-29.31-generic 4.15.18
Uname: Linux 4.15.0-29-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CompositorRunning: None
CurrentDesktop: GNOME
Date: Sun Jan 27 02:11:30 2019
DistUpgraded: Fresh install
DistroCodename: bionic
DistroVariant: ubuntu
GpuHangFrequency: Continuously
GpuHangReproducibility: I don't know
GpuHangStarted: Since a couple weeks or more
GraphicsCard:
 Intel Corporation HD Graphics 5500 [8086:1616] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Toshiba America Info Systems HD Graphics 5500 [1179:f920]
InstallationDate: Installed on 2019-01-24 (2 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
Lsusb:
 Bus 001 Device 002: ID 8087:8001 Intel Corp.
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 002 Device 002: ID 8087:07dc Intel Corp.
 Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: TOSHIBA Satellite L50-B
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-29-generic root=UUID=220449dc-de23-41d3-9305-079db3268b33 ro quiet splash vt.handoff=1
SourcePackage: xorg
Symptom: display
Title: Xorg freeze
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/02/2014
dmi.bios.vendor: INSYDE Corp.
dmi.bios.version: 2.00
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: Type2 - Board Product Name1
dmi.board.vendor: Type2 - Board Vendor Name1
dmi.board.version: Type2 - Board Version
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: OEM Chassis ManuFacturer
dmi.chassis.version: OEM Chassis Version
dmi.modalias: dmi:bvnINSYDECorp.:bvr2.00:bd12/02/2014:svnTOSHIBA:pnSatelliteL50-B:pvrPSKTNV-02Y01DAR:rvnType2-BoardVendorName1:rnType2-BoardProductName1:rvrType2-BoardVersion:cvnOEMChassisManuFacturer:ct10:cvrOEMChassisVersion:
dmi.product.family: INVALID
dmi.product.name: Satellite L50-B
dmi.product.version: PSKTNV-02Y01DAR
dmi.sys.vendor: TOSHIBA
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.91-2
version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.5-0ubuntu0~18.04.1
version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.5-0ubuntu0~18.04.1
version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1
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