Created attachment 124765 [details]
dmesg of all that boot

This is debian testing, fully updated as of 28 jun 2016 (today)

I believe the lockup happened while rendering video via kdenlive (all multithreading options set to 6, gpu acceleration on (not sure it works)),
and then trying to change a page in google chrome.

$ lscpu 
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                6
On-line CPU(s) list:   0-5
Thread(s) per core:    1
Core(s) per socket:    6
Socket(s):             1
NUMA node(s):          1
Vendor ID:             AuthenticAMD
CPU family:            16
Model:                 10
Model name:            AMD Phenom(tm) II X6 1075T Processor
Stepping:              0
CPU MHz:               3000.000
CPU max MHz:           3000.0000
CPU min MHz:           800.0000
BogoMIPS:              6019.74
Virtualization:        AMD-V
L1d cache:             64K
L1i cache:             64K
L2 cache:              512K
L3 cache:              6144K
NUMA node0 CPU(s):     0-5
Flags:                 fpu 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 lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid aperfmperf eagerfpu pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt nodeid_msr cpb hw_pstate vmmcall npt lbrv svm_lock nrip_save pausefilter