Public bug reported:

I was running 13.10.  Upgrading to 14.04 makes the machine completely
useless in X.

I have a couple of screen pictures.  I'll attach one of them...  It only
wants me to to attach a single picture...

 $ lspci -v
00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD/ATI] RS690 Host Bridge
        Subsystem: ASUSTeK Computer Inc. Device 826d
        Flags: bus master, 66MHz, medium devsel, latency 64

00:02.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RS690 PCI to PCI 
Bridge (PCI Express Graphics Port 0) (prog-if 00 [Normal decode])
        Flags: bus master, fast devsel, latency 0
        Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
        I/O behind bridge: 0000d000-0000dfff
        Memory behind bridge: fdc00000-fdcfffff
        Prefetchable memory behind bridge: 00000000d0000000-00000000dfffffff
        Capabilities: <access denied>
        Kernel driver in use: pcieport

00:07.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RS690 PCI to PCI 
Bridge (PCI Express Port 3) (prog-if 00 [Normal decode])
        Flags: bus master, fast devsel, latency 0
        Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
        I/O behind bridge: 0000e000-0000efff
        Memory behind bridge: fdb00000-fdbfffff
        Prefetchable memory behind bridge: 00000000fdf00000-00000000fdffffff
        Capabilities: <access denied>
        Kernel driver in use: pcieport

00:12.0 SATA controller: Advanced Micro Devices, Inc. [AMD/ATI] SB600 
Non-Raid-5 SATA (prog-if 01 [AHCI 1.0])
        Subsystem: ASUSTeK Computer Inc. Device 81ef
        Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 22
        I/O ports at ff00 [size=8]
        I/O ports at fe00 [size=4]
        I/O ports at fd00 [size=8]
        I/O ports at fc00 [size=4]
        I/O ports at fb00 [size=16]
        Memory at fe02f000 (32-bit, non-prefetchable) [size=1K]
        Capabilities: <access denied>
        Kernel driver in use: ahci

00:13.0 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB600 USB 
(OHCI0) (prog-if 10 [OHCI])
        Subsystem: ASUSTeK Computer Inc. Device 81ef
        Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 16
        Memory at fe02e000 (32-bit, non-prefetchable) [size=4K]
        Kernel driver in use: ohci-pci

00:13.1 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB600 USB 
(OHCI1) (prog-if 10 [OHCI])
        Subsystem: ASUSTeK Computer Inc. Device 81ef
        Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 17
        Memory at fe02d000 (32-bit, non-prefetchable) [size=4K]
        Kernel driver in use: ohci-pci

00:13.2 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB600 USB 
(OHCI2) (prog-if 10 [OHCI])
        Subsystem: ASUSTeK Computer Inc. Device 81ef
        Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 18
        Memory at fe02c000 (32-bit, non-prefetchable) [size=4K]
        Kernel driver in use: ohci-pci

00:13.3 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB600 USB 
(OHCI3) (prog-if 10 [OHCI])
        Subsystem: ASUSTeK Computer Inc. Device 81ef
        Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 17
        Memory at fe02b000 (32-bit, non-prefetchable) [size=4K]
        Kernel driver in use: ohci-pci

00:13.4 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB600 USB 
(OHCI4) (prog-if 10 [OHCI])
        Subsystem: ASUSTeK Computer Inc. Device 81ef
        Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 18
        Memory at fe02a000 (32-bit, non-prefetchable) [size=4K]
        Kernel driver in use: ohci-pci

00:13.5 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB600 USB 
Controller (EHCI) (prog-if 20 [EHCI])
        Subsystem: ASUSTeK Computer Inc. Device 81ef
        Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 19
        Memory at fe029000 (32-bit, non-prefetchable) [size=256]
        Capabilities: <access denied>
        Kernel driver in use: ehci-pci

00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 SMBus Controller 
(rev 13)
        Subsystem: ASUSTeK Computer Inc. Device 81ef
        Flags: bus master, VGA palette snoop, stepping, fast Back2Back, 66MHz, 
user-definable features, ?? devsel, latency 0
        I/O ports at 0b00 [size=16]
        Capabilities: <access denied>
        Kernel driver in use: piix4_smbus

00:14.1 IDE interface: Advanced Micro Devices, Inc. [AMD/ATI] SB600 IDE 
(prog-if 8a [Master SecP PriP])
        Subsystem: ASUSTeK Computer Inc. Device 81ef
        Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 16
        I/O ports at 01f0 [size=8]
        I/O ports at 03f4
        I/O ports at 0170 [size=8]
        I/O ports at 0374
        I/O ports at f900 [size=16]
        Capabilities: <access denied>
        Kernel driver in use: pata_atiixp

00:14.2 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 Azalia 
(Intel HDA)
        Subsystem: ASUSTeK Computer Inc. Device 8249
        Flags: bus master, slow devsel, latency 64, IRQ 44
        Memory at fe020000 (64-bit, non-prefetchable) [size=16K]
        Capabilities: <access denied>
        Kernel driver in use: snd_hda_intel

00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD/ATI] SB600 PCI to LPC 
Bridge
        Subsystem: ASUSTeK Computer Inc. Device 81ef
        Flags: bus master, 66MHz, medium devsel, latency 0

00:14.4 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 PCI to PCI 
Bridge (prog-if 01 [Subtractive decode])
        Flags: bus master, VGA palette snoop, 66MHz, medium devsel, latency 64
        Bus: primary=00, secondary=03, subordinate=03, sec-latency=64
        I/O behind bridge: 0000c000-0000cfff
        Memory behind bridge: fde00000-fdefffff
        Prefetchable memory behind bridge: fdd00000-fddfffff

00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] K8 [Athlon64/Opteron] 
HyperTransport Technology Configuration
        Flags: fast devsel
        Capabilities: <access denied>

00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] K8 [Athlon64/Opteron] 
Address Map
        Flags: fast devsel

00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] K8 [Athlon64/Opteron] 
DRAM Controller
        Flags: fast devsel

00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] K8 [Athlon64/Opteron] 
Miscellaneous Control
        Flags: fast devsel
        Capabilities: <access denied>
        Kernel driver in use: k8temp

01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV630 
PRO [Radeon HD 2600 PRO] (prog-if 00 [VGA controller])
        Subsystem: PC Partner Limited / Sapphire Technology Device e420
        Flags: bus master, fast devsel, latency 0, IRQ 43
        Memory at d0000000 (64-bit, prefetchable) [size=256M]
        Memory at fdce0000 (64-bit, non-prefetchable) [size=64K]
        I/O ports at de00 [size=256]
        Expansion ROM at fdcc0000 [disabled] [size=128K]
        Capabilities: <access denied>
        Kernel driver in use: radeon

01:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] RV630 HDMI Audio 
[Radeon HD 2600 Series]
        Subsystem: PC Partner Limited / Sapphire Technology Device aa08
        Flags: bus master, fast devsel, latency 0, IRQ 45
        Memory at fdcfc000 (64-bit, non-prefetchable) [size=16K]
        Capabilities: <access denied>
        Kernel driver in use: snd_hda_intel

02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 
PCI Express Gigabit Ethernet Controller (rev 01)
        Subsystem: ASUSTeK Computer Inc. P5B
        Flags: bus master, fast devsel, latency 0, IRQ 42
        I/O ports at ee00 [size=256]
        Memory at fdbff000 (64-bit, non-prefetchable) [size=4K]
        [virtual] Expansion ROM at fdf00000 [disabled] [size=128K]
        Capabilities: <access denied>
        Kernel driver in use: r8169

03:07.0 FireWire (IEEE 1394): VIA Technologies, Inc. VT6306/7/8 [Fire II(M)] 
IEEE 1394 OHCI Controller (rev c0) (prog-if 10 [OHCI])
        Subsystem: ASUSTeK Computer Inc. Motherboard
        Flags: bus master, medium devsel, latency 64, IRQ 22
        Memory at fdeff000 (32-bit, non-prefetchable) [size=2K]
        I/O ports at cf00 [size=128]
        Capabilities: <access denied>
        Kernel driver in use: firewire_ohci

servidor:~ $

** Affects: xorg-server (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "screen after somehow stumbling  past the hosed login 
screen"
   
https://bugs.launchpad.net/bugs/1336831/+attachment/4143932/+files/2014-07-02%2008.10.40.jpg

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https://bugs.launchpad.net/bugs/1336831

Title:
  upgrade to 14.04 completely scrambles screen - rendering machine
  useless

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