will not boot video

[Robert Renfro]

Seems that either the driver is not loading or the incorrect driver is being loaded. The system seems to be loading behind a blank screen. I hear the audio prompt for the login password and I can also see the hard drive running and going into standby as it does when the video is displayed. This is a dual boot system with Win 10 as the other OS. each OS has a 1 terabyte drive of it's own.

If I select the the ver, 16.04 LTS troubleshooting menu selection and then the "Repair" selection when it reaches the "do you want to upgrade ?" I enter d for details, the system then replys with "END" and I enter with a control-c, the system continues to boot and the video is restored. I have retried this several times as I have selected many menu selections and the only procedure that works is the one I have just detailed.

Ubuntu 16.04 LTS
Memory:14.9 GiB
Processor: AMD A6-5400K APU with Radeon(tm) HD Graphics × 2
Graphics: Gallium 0.4 on llvmpipe (LLVM 3.8, 128 bits)
OS Type: 64-bit
Disk: 968.2 GB
Motherboard MFG: Gigabyte

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xorg 1:7.7+13ubuntu3
ProcVersionSignature: Ubuntu 4.2.0-36.41-generic 4.2.8-ckt8
Uname: Linux 4.2.0-36-generic x86_64
.tmp.unity_support_test.1:

ApportVersion: 2.20.1-0ubuntu2
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
Date: Mon Apr 25 17:53:12 2016
DistUpgraded: Fresh install
DistroCodename: xenial
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] Trinity [Radeon HD 7540D] [1002:9991] (prog-if 00 [VGA controller])
   Subsystem: Advanced Micro Devices, Inc. [AMD/ATI] Trinity [Radeon HD 7540D] [1002:9991]
InstallationDate: Installed on 2016-04-03 (22 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
MachineType: Gigabyte Technology Co., Ltd. To be filled by O.E.M.
ProcEnviron:
 LANGUAGE=en_US
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-36-generic.efi.signed root=UUID=b8832a0c-2961-408d-8b33-7937d2387e52 ro recovery nomodeset
Renderer: Software
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
XorgLogOld:

dmi.bios.date: 03/12/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: F3
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: F2A85XM-HD3
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: To be filled by O.E.M.
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF3:bd03/12/2013:svnGigabyteTechnologyCo.,Ltd.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnF2A85XM-HD3:rvrTobefilledbyO.E.M.:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To be filled by O.E.M.
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
version.compiz: compiz 1:0.9.12.2+16.04.20160415-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.67-1
version.libgl1-mesa-dri: libgl1-mesa-dri 11.2.0-1ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.2.0-1ubuntu2
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: Mon Apr 25 18:52:12 2016
xserver.configfile: default
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:

xserver.version: 2:1.18.3-1ubuntu2

[penalvch (penalvch)]

Robert Renfro, thank you for reporting this and helping make Ubuntu better.

Could you please provide the missing information following https://wiki.ubuntu.com/DebuggingKernelBoot ?

[Launchpad Janitor (janitor)]

[Expired for xorg (Ubuntu) because there has been no activity for 60 days.]