I have the same problem after upgrading to 16.04 from 14.04.
I am using a Kaveri APU, that is supposed to work with both "radeon" and
"amdgpu" drivers.
The "radeon" driver doesn't work: after the very initial steps of the
bootstrap, the screen goes black, although a may access the system via SSH.
Setting "nomodeset" prevents the "radeon" driver to start, reverting back to
basic driver.
However, the new "amdgpu" driver seems working fine.
I managed to fix the issue in the following way:
1. blacklist "radeon", by creating a new file
/etc/modprobe.d/blacklist-radeon.conf having a single line "blacklist radeon";
2. force "amdgpu", by appending to /etc/modules the line "amdgpu";
3. setting the screen resolution in grub, by uncomment the line GRUB_GFXMODE,
e.g. "GRUB_GFXMODE=1280x1024";
4. create a new file /etc/X11/xorg.conf, having a block
Section "Device"
Identifier "VideoCard"
DriveR "amdgpu"
EndSection
5. update initramfs, via "update-initramfs -u -k all" with sudo;
6. update grub configuration, via "update-grub" with sudo.
Maybe other user having a GCN-enabled AMD video card may fix the issue in the
same way.
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Touch seeded packages, which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1568429
Title:
1002:68b8 Radeon won't work with KMS enabled
Status in xorg package in Ubuntu:
Incomplete
Bug description:
After upgrading to Xenial today and ensuring the xorg radeon driver
was enabled, when booting both monitor lose signal input and the
keyboard becomes unresponsive.
My hardware:
02:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
[AMD/ATI] Juniper XT [Radeon HD 5770] [1002:68b8] (prog-if 00 [VGA controller])
Subsystem: XFX Pine Group Inc. Juniper XT [Radeon HD 5770] [1682:2990]
WORKAROUND: Use one of the following kernel parameters:
nomodeset
radeon.modeset=0
The machine will boot but the radeon driver will not load. Attempting
to load radeon driver with `sudo modprobe radeon modeset=1` after
booting with modesetting off results in the same fail state explained
above.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xorg 1:7.7+13ubuntu3
ProcVersionSignature: Ubuntu 4.4.0-18.34-generic 4.4.6
Uname: Linux 4.4.0-18-generic x86_64
.tmp.unity.support.test.1:
ApportVersion: 2.20.1-0ubuntu1
Architecture: amd64
CompizPlugins:
[core,bailer,detection,composite,opengl,compiztoolbox,decor,grid,mousepoll,widget,regex,vpswitch,resize,imgpng,place,gnomecompat,wall,move,animation,fade,snap,expo,scale,unitymtgrabhandles,ezoom,session,workarounds]
CompositorRunning: None
Date: Sat Apr 9 20:02:22 2016
DistUpgraded: 2016-04-09 16:49:55,340 ERROR got error from PostInstallScript
./xorg_fix_proprietary.py (g-exec-error-quark: Failed to execute child process
"./xorg_fix_proprietary.py" (No such file or directory) (8))
DistroCodename: xenial
DistroVariant: ubuntu
DkmsStatus:
vboxhost, 5.0.12, 4.2.0-35-generic, x86_64: installed
vboxhost, 5.0.12, 4.4.0-18-generic, x86_64: installed
ExtraDebuggingInterest: Yes
GpuHangFrequency: Continuously
GpuHangReproducibility: Yes, I can easily reproduce it
GpuHangStarted: Immediately after installing this version of Ubuntu
GraphicsCard:
Advanced Micro Devices, Inc. [AMD/ATI] Juniper XT [Radeon HD 5770]
[1002:68b8] (prog-if 00 [VGA controller])
Subsystem: XFX Pine Group Inc. Juniper XT [Radeon HD 5770] [1682:2990]
InstallationDate: Installed on 2013-12-29 (832 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64
(20131016.1)
MachineType: System manufacturer System Product Name
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-18-generic
root=UUID=e7310b2e-03b9-4e94-ba8a-d384330592cf ro quiet splash radeon.modeset=0
Renderer: Software
SourcePackage: xorg
Symptom: display
Title: Xorg freeze
UpgradeStatus: Upgraded to xenial on 2016-04-09 (0 days ago)
dmi.bios.date: 04/29/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0519
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P5N7A-VM
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.:bvr0519:bd04/29/2010:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5N7A-VM:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
version.compiz: compiz 1:0.9.12.2+16.04.20160331-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.67-1
version.libgl1-mesa-dri: libgl1-mesa-dri 11.2.0-1ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.2.0-1ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.18.3-1ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel
2:2.99.917+git20160325-1ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
1:1.0.12-1build2
xserver.bootTime: Sat Apr 9 19:49:46 2016
xserver.configfile: default
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
xserver.version: 2:1.18.3-1ubuntu2
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