Currently the problems are: 1. can only log in with recovery mode / nouveau, 2. poor screen resolution, and 3. screen display shows "built in display" only.
My graphics card is: 1024Mb ATi Radeon HD 5770 PCI-Express VGA Card. It was working fine before moving from 14.04 to 16.04 yesterday.
I have an Intel CPU and I believe I am using the open source radeon driver.
Please, could someone tell me how to get the graphics card working again?
When I run this command: dmesg | egrep 'drm|radeon'
I get this response:
[ 1.536906] [drm] Initialized drm 1.1.0 20060810
[ 1.586158] [drm] VGACON disable radeon kernel modesetting.
[ 1.586239] [drm:radeon_init [radeon]] *ERROR* No UMS support in radeon module!
[ 44.543359] [drm] VGACON disable radeon kernel modesetting.
[ 44.543388] [drm:radeon_init [radeon]] *ERROR* No UMS support in radeon module!
When I enter lshw -c video
I get:
*-display UNCLAIMED
description: VGA compatible controller
product: Juniper XT [Radeon HD 5770]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0
bus info: pci@0000:01:00.0
version: 00
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi vga_controller bus_master cap_list
configuration: latency=0
resources: memory:e0000000-efffffff memory:fbdc0000-fbddffff ioport:ee00(size=256) memory:fbd00000-fbd1ffff
The output of sudo cat /etc/default/grub
can be seen here http://paste.ubuntu.com/22074912/