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[Andy Bauer <1493888@xxxxxxxxxxxxxxxxxx>]

In my case, Ubuntu created a trifecta of video driver show-stoppers,
which prevented me from having a stable desktop while using a Radeon R9
380 and dual 1080p monitors. Each of the three drivers: fglrx, radeon,
and amdgpu all had unique issues, and yes I'm aware that the issue with
fglrx was in the release notes. I'm leaving out further details, because
this post is about a solution that worked for me.

1) completely remove fglrx from your system
2) roll back to the 3.19 kernel used in the previous release of Ubuntu. Temporarily add the Vivid repo, add install the 3.19 kernel, boot off the 3.19 kernel, remove all other kernels from your system.
3) Modify the symlink /usr/bin/gcc to point to /usr/bin/gcc-4.9 instead of gcc-5
4) reinstall fglrx then reboot

I did this based on the previous comments in this bug report.

I've been running in this configuration a couple of weeks now with no
issues. It's possible these changes could cause problems with something
else expecting a newer kernel or gcc-5, but I have yet to experience any
issues.

I plan to leave my system in this configuration until the next release
of Ubuntu, next April.

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to fglrx-installer in Ubuntu.
https://bugs.launchpad.net/bugs/1493888

Title:
  FGLRX incompatible with gcc 5

Status in Release Notes for Ubuntu:
  Fix Released
Status in fglrx-installer package in Ubuntu:
  Fix Released
Status in fglrx-installer-updates package in Ubuntu:
  Fix Released
Status in fglrx-installer source package in Wily:
  Fix Released
Status in fglrx-installer-updates source package in Wily:
  Fix Released

Bug description:
  SRU Request:

  [Impact]

  The fglrx driver is not compatible with gcc 5.x. This causes the
  kernel module to crash on initialisation. As a result, users will boot
  into a black screen, as X will fail (except on Intel+AMD hybrid
  systems, where intel is used).

  [Test Case]
  1. Either install (or upgrade to) Ubuntu 15.10 and fglrx
  2. Reboot
  3. Check the display, and the output of the "dmesg | grep fglrx" command (to see the actual crash)

  Expected results: the system should be able to start X correctly.

  Actual results:
  The kernel module fails and X doesn't start.

  [Regression Potential]
  Low. Forcing fglrx to use gcc 4.9 is only a temporary workaround, and will be replaced with the proper fix once AMD makes it available.


  __________________________________________________________________________

  With a R9 280 and FGLRX on ubuntu 15.10 the graphics lock up. I am
  able to SSH into the machine. I booted the older kernel
  (4.1.0-3-generic) and it works with FGLRX. After purging FGLRX and
  using xserver-xorg-video-radeon I am able to get the graphics working,
  but even it has issues with my display port (The DVI ports are working
  correctly).

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: fglrx (not installed)
  ProcVersionSignature: Ubuntu 4.2.0-7.7-generic 4.2.0
  Uname: Linux 4.2.0-7-generic x86_64
  ApportVersion: 2.18-0ubuntu9
  Architecture: amd64
  Date: Wed Sep  9 09:29:54 2015
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2011-01-07 (1705 days ago)
  InstallationMedia: Kubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
  ProcEnviron:
   LANGUAGE=
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: fglrx-installer
  UpgradeStatus: Upgraded to wily on 2015-08-18 (21 days ago)

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