After allowing my desktop to time out and lock the screen it would not unlock. I tried CTRL-ALT-DEL and ESC but the screen remained black. Then I rebooted my computer and it appeared to boot with no errors but after the KDE symbol and version number finished flashing the screen goes white. Prior to my computer screen locking I was on the Ubuntu Forum site updating my profile. The only changes I have made to my system today was installing plymouth-manager, to change my login and splash screen, and applying the latest updates. The information about my system is listed below. If you need any other information let me know. Currently, I booted my system from a Live DVD.
Code:
kubuntu@kubuntu:~/Public$ sudo lshw
kubuntu
description: Desktop Computer
product: GA-78LMT-USB3 6.0
vendor: Gigabyte Technology Co., Ltd.
width: 64 bits
capabilities: smbios-2.4 dmi-2.4 smp vsyscall32
configuration: boot=normal chassis=desktop uuid=34303844-3543-3734-3942-3730FFFFFFFF
*-core
description: Motherboard
product: GA-78LMT-USB3 6.0
vendor: Gigabyte Technology Co., Ltd.
physical id: 0
version: SEx
*-firmware
description: BIOS
vendor: Award Software International, Inc.
physical id: 0
version: F2
date: 11/25/2014
size: 128KiB
capacity: 4032KiB
capabilities: isa pci pnp apm upgrade shadowing cdboot bootselect socketedrom edd int13floppy360 int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int9keyboard int14serial int17printer int10video acpi usb agp ls120boot zipboot biosbootspecification
*-cpu
description: CPU
product: AMD FX(tm)-4350 Quad-Core Processor
vendor: Advanced Micro Devices [AMD]
physical id: 4
bus info: cpu@0
version: AMD FX(tm)-4350 Quad-Core Processor
slot: Socket M2
size: 2GHz
capacity: 4200MHz
width: 64 bits
clock: 200MHz
capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp x86-64 constant_tsc rep_good nopl nonstop_tsc extd_apicid aperfmperf pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 popcnt aes xsave avx f16c lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs xop skinit wdt lwp fma4 tce nodeid_msr tbm topoext perfctr_core perfctr_nb cpb hw_pstate vmmcall bmi1 arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold cpufreq
*-cache:0
description: L1 cache
physical id: a
slot: Internal Cache
size: 128KiB
capacity: 128KiB
capabilities: synchronous internal write-back
configuration: level=1
*-cache:1
description: L3 cache
physical id: c
slot: External Cache
size: 2MiB
capacity: 2MiB
capabilities: synchronous internal write-back
configuration: level=3
*-cache
description: L1 cache
physical id: b
slot: Internal Cache
size: 128KiB
capacity: 128KiB
capabilities: synchronous internal write-back
configuration: level=1
*-memory
description: System Memory
physical id: 23
slot: System board or motherboard
size: 8GiB
*-bank:0
description: DIMM 1333 MHz (0.8 ns) [empty]
product: None
vendor: None
physical id: 0
serial: None
slot: A0
width: 64 bits
clock: 1333MHz (0.8ns)
*-bank:1
description: DIMM 1333 MHz (0.8 ns) [empty]
product: None
vendor: None
physical id: 1
serial: None
slot: A1
width: 64 bits
clock: 1333MHz (0.8ns)
*-bank:2
description: DIMM 1333 MHz (0.8 ns) [empty]
product: None
vendor: None
physical id: 2
serial: None
slot: A2
width: 64 bits
clock: 1333MHz (0.8ns)
*-bank:3
description: DIMM 1333 MHz (0.8 ns)
product: None
vendor: None
physical id: 3
serial: None
slot: A3
size: 8GiB
width: 64 bits
clock: 1333MHz (0.8ns)
*-pci:0
description: Host bridge
product: RS780 Host Bridge
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 100
bus info: pci@0000:00:00.0
version: 00
width: 64 bits
clock: 66MHz
configuration: latency=32
*-pci:0
description: PCI bridge
product: RS780 PCI to PCI bridge (ext gfx port 0)
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 2
bus info: pci@0000:00:02.0
version: 00
width: 32 bits
clock: 33MHz
capabilities: pci pm pciexpress msi ht normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:24 ioport:e000(size=4096) memory:fb000000-fcffffff ioport:c0000000(size=536870912)
*-display
description: VGA compatible controller
product: GM206 [GeForce GTX 950]
vendor: NVIDIA Corporation
physical id: 0
bus info: pci@0000:01:00.0
version: a1
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
configuration: driver=nouveau latency=0
resources: irq:29 memory:fb000000-fbffffff memory:c0000000-cfffffff memory:de000000-dfffffff ioport:ef00(size=128) memory:c0000-dffff
*-multimedia
description: Audio device
product: NVIDIA Corporation
vendor: NVIDIA Corporation
physical id: 0.1
bus info: pci@0000:01:00.1
version: a1
width: 32 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=snd_hda_intel latency=0
resources: irq:19 memory:fcffc000-fcffffff
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