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[Roger Barrett <1493888@xxxxxxxxxxxxxxxxxx>]

@Mathew Hodson.

OK, so when switching from AMD to Open Source drivers in the additional
drivers tab, the fglrx-updates-core and fglrx-updates-dev are left
installed. This means that on reboot, dmesg contains the following

[    2.470360] fglrx: module license 'Proprietary. (C) 2002 - ATI Technologies, Starnberg, GERMANY' taints kernel.
[    2.470362] Disabling lock debugging due to kernel taint
[    2.474696] fglrx: module verification failed: signature and/or required key missing - tainting kernel
[    2.502797] random: nonblocking pool is initialized
[    2.513664] <6>[fglrx] Maximum main memory to use for locked dma buffers: 31469 MBytes.
[    2.514055] <6>[fglrx]   vendor: 1002 device: 67b1 revision: 0 count: 1
[    2.514697] <6>[fglrx] ioport: bar 4, base 0xe000, size: 0x100
[    2.515002] <6>[fglrx] Kernel PAT support is enabled
[    2.515016] <6>[fglrx] module loaded - fglrx 15.20.3 [Sep  8 2015] with 1 minors

lsmod shows fglrx, with no users, but neither amdgpu nor radeon. Trying
to load those modules with modprobe gives:

modprobe: ERROR: could not insert 'off': Function not implemented

Running gpu-manager gives:

last_boot_file: /var/lib/ubuntu-drivers-common/last_gfx_boot
new_boot_file: /var/lib/ubuntu-drivers-common/last_gfx_boot
grep dmesg status 256
dmesg status 256 == 0? No
/etc/modprobe.d is not a file
/etc/modprobe.d is not a file
/etc/modprobe.d is not a file
/etc/modprobe.d is not a file
Is nvidia loaded? no
Was nvidia unloaded? no
Is nvidia blacklisted? no
Is fglrx loaded? yes
Was fglrx unloaded? no
Is fglrx blacklisted? no
Is intel loaded? no
Is radeon loaded? no
Is radeon blacklisted? yes
Is nouveau loaded? no
Is nouveau blacklisted? no
Is fglrx kernel module available? yes
Is nvidia kernel module available? no
Vendor/Device Id: 1002:67b1
BusID "PCI:2@0:0:0"
Is boot vga? yes
Error : Failed to open /dev/dri
Error : Failed to open /dev/dri
Error : Failed to open /dev/dri
Does it require offloading? no
last cards number = 1
I couldn't open /var/lib/ubuntu-drivers-common/last_gfx_boot for writing.
Error: can't write to /var/lib/ubuntu-drivers-common/last_gfx_boot

The Xorg.0.log file ( attached ) seems to try and fail a few
alternatives before settling on FBDEV as the driver, which then causes
AIGLX to degrade to software rendering.


To my little brain, this looks like fglrx doesn't get properly removed, and the open source modules are not removed from blacklisting.

** Attachment added: "Xorg.0.log"
   https://bugs.launchpad.net/ubuntu/+source/fglrx-installer/+bug/1493888/+attachment/4517639/+files/Xorg.0.log

-- 
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 Committed
Status in fglrx-installer-updates source package in Wily:
  Fix Committed

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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