Occasionally my whole screen locks up and I cannot even swith to the console and I find this in my syslog:
*-display
description: VGA compatible controller
product: Mullins [Radeon R3 Graphics]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 1
bus info: pci@0000:00:01.0
version: 45
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
configuration: driver=radeon latency=0
resources: irq:37 memory:e0000000-efffffff memory:f0000000-f07fffff ioport:3000(size=256) memory:f0c00000-f0c3ffff memory:f0c80000-f0c9ffff
Mar 10 12:30:12 kernel: [13319.636805] INFO: task Xorg:1501 blocked for more than 120 seconds.
Mar 10 12:30:12 kernel: [13319.636819] Tainted: G W OE 4.4.0-173-generic #203-Ubuntu
Mar 10 12:30:12 kernel: [13319.636823] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar 10 12:30:12 kernel: [13319.636829] Xorg D ffff880214f1fb78 0 1501 1471 0x00000004
Mar 10 12:30:12 kernel: [13319.636841] ffff880214f1fb78 0000000000000000 ffff880139987000 ffff880035021c00
Mar 10 12:30:12 kernel: [13319.636850] ffff880214f20000 ffff880035021c00 ffff880035360030 ffffffff00000000
Mar 10 12:30:12 kernel: [13319.636858] fffffffe00000001 ffff880214f1fb90 ffffffff818629d5 ffff880035360018
Mar 10 12:30:12 kernel: [13319.636866] Call Trace:
Mar 10 12:30:12 kernel: [13319.636885] [
Mar 10 12:30:12 kernel: [13319.636895] [
Mar 10 12:30:12 kernel: [13319.636909] [
Mar 10 12:30:12 kernel: [13319.636918] [
Mar 10 12:30:12 kernel: [13319.636980] [
Mar 10 12:30:12 kernel: [13319.637035] [
Mar 10 12:30:12 kernel: [13319.637047] [
Mar 10 12:30:12 kernel: [13319.637108] [
Mar 10 12:30:12 kernel: [13319.637169] [
Mar 10 12:30:12 kernel: [13319.637216] [
Mar 10 12:30:12 kernel: [13319.637227] [
Mar 10 12:30:12 kernel: [13319.637288] [
Mar 10 12:30:12 kernel: [13319.637298] [
Mar 10 12:30:12 kernel: [13319.637347] [
Mar 10 12:30:12 kernel: [13319.637358] [
Mar 10 12:30:12 kernel: [13319.637366] [
Mar 10 12:30:12 kernel: [13319.637375] [
Mar 10 12:30:12 kernel: [13319.637578] INFO: task kworker/u8:1:15955 blocked for more than 120 seconds.
Mar 10 12:30:12 kernel: [13319.637585] Tainted: G W OE 4.4.0-173-generic #203-Ubuntu
Mar 10 12:30:12 kernel: [13319.637589] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar 10 12:30:12 kernel: [13319.637593] kworker/u8:1 D ffff8800235b7a18 0 15955 2 0x00000000
Mar 10 12:30:12 kernel: [13319.637661] Workqueue: radeon-crtc radeon_flip_work_func [radeon]
Mar 10 12:30:12 kernel: [13319.637667] ffff8800235b7a18 0000000000000001 ffff88021625aa00 ffff880139986200
Mar 10 12:30:12 kernel: [13319.637675] ffff8800235b8000 ffff8800235b7b68 ffff880035360000 ffff8800235b7b00
Mar 10 12:30:12 kernel: [13319.637682] ffff880035361498 ffff8800235b7a30 ffffffff818629d5 7fffffffffffffff
Mar 10 12:30:12 kernel: [13319.637690] Call Trace:
Mar 10 12:30:12 kernel: [13319.637700] [
Mar 10 12:30:12 kernel: [13319.637707] [
Mar 10 12:30:12 kernel: [13319.637767] [
Mar 10 12:30:12 kernel: [13319.637822] [
Mar 10 12:30:12 kernel: [13319.637832] [
Mar 10 12:30:12 kernel: [13319.637887] [
Mar 10 12:30:12 kernel: [13319.637964] [
Mar 10 12:30:12 kernel: [13319.638044] [
Mar 10 12:30:12 kernel: [13319.638094] [
Mar 10 12:30:12 kernel: [13319.638154] [
Mar 10 12:30:12 kernel: [13319.638162] [
Mar 10 12:30:12 kernel: [13319.638169] [
Mar 10 12:30:12 kernel: [13319.638175] [
Mar 10 12:30:12 kernel: [13319.638184] [
Mar 10 12:30:12 kernel: [13319.638190] [
Mar 10 12:30:12 kernel: [13319.638197] [
Mar 10 12:30:12 kernel: [13319.638205] [
Mar 10 12:30:12 kernel: [13319.638212] [
Mar 10 12:30:12 kernel: [13319.638220] [
Mar 10 12:30:12 kernel: [13319.638228] [
Mar 10 12:30:12 kernel: [13319.638235] [
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