@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 Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1493888 Title: FGLRX incompatible with gcc 5 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-release-notes/+bug/1493888/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
