First time I've done a bug report here, so pardon if everything is horribly hard to read. As you can see, I've been "roughing" these crashes for some time, mildly annoying, but most of the games I tend to play aren't really affected by the crashes (near persistent auto-saves). Will provide more information as soon as I know what else is required.

Processor Information:
Vendor: AuthenticAMD
CPU Family: 0x10
CPU Model: 0xa
CPU Stepping: 0x0
CPU Type: 0x0
Speed: 2812 Mhz
6 logical processors
6 physical processors
HyperThreading: Unsupported
FCMOV: Supported
SSE2: Supported
SSE3: Supported
SSSE3: Unsupported
SSE4a: Supported
SSE41: Unsupported
SSE42: Unsupported

Network Information:
Network Speed:

Operating System Version:
Debian GNU/Linux 8.2 (jessie) (64 bit)
Kernel Name: Linux
Kernel Version: 4.2.0-0.bpo.1-amd64
X Server Vendor: The X.Org Foundation
X Server Release: 11604000
X Window Manager: Xfwm4
Steam Runtime Version: steam-runtime-release_2015-06-12

Video Card:
Driver: NVIDIA Corporation GeForce GT 640/PCIe/SSE2

Driver Version:  4.5.0 NVIDIA 358.16
OpenGL Version: 4.5
Desktop Color Depth: 24 bits per pixel
Monitor Refresh Rate: 60 Hz
VendorID:  0x10de
DeviceID:  0xfc1
Number of Monitors:  1
Number of Logical Video Cards:  1
Primary Display Resolution:  1920 x 1080
Desktop Resolution: 1920 x 1080
Primary Display Size: 45.28" x 25.59"  (51.97" diag)
                                        115.0cm x 65.0cm  (132.0cm diag)
Primary Bus: PCI Express 16x
Primary VRAM: 2048 MB
Supported MSAA Modes:  2x 4x 8x 16x 

Sound card:
Audio device: VIA VT1708S

Memory:
RAM: 7987 Mb

Miscellaneous:
UI Language: English
LANG: en_US.utf8
Microphone: Not set
Total Hard Disk Space Available: 922648 Mb
Largest Free Hard Disk Block: 554545 Mb

Installed software:

Recent Failure Reports:
Tue Dec 29 12:06:22 2015 GMT: file ''/tmp/dumps/crash_20151229070616_21.dmp'', upload yes: ''CrashID=bp-188f447f-31e7-47d0-9153-d78f62151229''
Tue Dec 29 12:13:44 2015 GMT: file ''/tmp/dumps/assert_20151229071337_16.dmp'', upload yes: ''CrashID=bp-d60d698f-96a2-46a9-8347-c27f72151229''
Tue Dec 29 14:31:56 2015 GMT: file ''/tmp/dumps/assert_20151229071244_1.dmp'', upload yes: ''CrashID=bp-a03dcb76-3f5e-40f4-a249-e13e12151229''
Tue Dec 29 23:47:00 2015 GMT: file ''/tmp/dumps/assert_20151229093204_1.dmp'', upload yes: ''CrashID=bp-5b739629-5093-488c-937a-7ab822151229''
Tue Dec 29 23:47:35 2015 GMT: file ''/tmp/dumps/assert_20151229184711_1.dmp'', upload yes: ''CrashID=bp-84d64009-5d39-4633-98a0-712b52151229''
Wed Dec 30 21:02:18 2015 GMT: file ''/tmp/dumps/assert_20151230160147_1.dmp'', upload yes: ''CrashID=bp-9e77c4e9-f0e9-42c2-ac52-5973d2151230''
Wed Dec 30 21:37:37 2015 GMT: file ''/tmp/dumps/crash_20151230163734_7.dmp'', upload yes: ''CrashID=bp-0265b7ec-b3be-49f6-94c1-5045d2151230''
Thu Dec 31 18:01:00 2015 GMT: file ''/tmp/dumps/crash_20151231130058_7.dmp'', upload yes: ''CrashID=bp-f3044f65-65fa-46f4-b8c8-25ec92151231''
Thu Dec 31 18:51:02 2015 GMT: file ''/tmp/dumps/assert_20151230160243_1.dmp'', upload yes: ''CrashID=bp-25fca02b-3301-48d9-af73-f72152151231''
Thu Dec 31 19:57:02 2015 GMT: file ''/tmp/dumps/crash_20151231145700_9.dmp'', upload yes: ''CrashID=bp-e19868d3-a591-421d-8b89-ae39e2151231''
Thu Dec 31 19:57:31 2015 GMT: file ''/tmp/dumps/crash_20151231145729_7.dmp'', upload yes: ''CrashID=bp-ac50934f-f8b8-44e2-b3aa-69c2a2151231''
Fri Jan 1 05:21:04 2016 GMT: file ''/tmp/dumps/crash_20151231183645_1.dmp'', upload yes: ''CrashID=bp-714e6db3-918e-4160-85e2-76d042151231''
Fri Jan 1 15:41:48 2016 GMT: file ''/tmp/dumps/assert_20160101104144_18.dmp'', upload yes: ''CrashID=bp-232aac0f-bdf7-474a-8adc-173582160101''
Fri Jan 1 19:23:54 2016 GMT: file ''/tmp/dumps/assert_20160101104847_1.dmp'', upload yes: ''CrashID=bp-0382989c-c939-43df-ab52-008632160101''
Fri Jan 1 19:23:58 2016 GMT: file ''/tmp/dumps/assert_20160101142354_2.dmp'', upload yes: ''Discarded=1''
Fri Jan 1 21:40:39 2016 GMT: file ''/tmp/dumps/crash_20160101164037_8.dmp'', upload yes: ''CrashID=bp-17a70b96-8db9-4be4-a644-d74382160101''
Sat Jan 2 16:09:39 2016 GMT: file ''/tmp/dumps/assert_20160101214724_1.dmp'', upload yes: ''CrashID=bp-a240288b-7b17-4cb0-a460-2cf082160102''
Sat Jan 2 18:47:14 2016 GMT: file ''/tmp/dumps/crash_20160102134712_7.dmp'', upload yes: ''CrashID=bp-ae5a85bd-780d-4880-9820-89a372160102''
Sun Jan 3 01:38:45 2016 GMT: file ''/tmp/dumps/crash_20160102202833_1.dmp'', upload yes: ''CrashID=bp-6ff83804-b62d-467d-aea7-95b672160102''
Mon Jan 4 13:27:02 2016 GMT: file ''/tmp/dumps/crash_20160102204355_1.dmp'', upload yes: ''CrashID=bp-b3f8611c-2da9-4648-8dd3-c78b92160104''
Mon Jan 4 14:13:00 2016 GMT: file ''/tmp/dumps/crash_20160104091202_1.dmp'', upload yes: ''CrashID=bp-88a7ea2b-ecfe-4bcb-9737-a8e7f2160104''
Mon Jan 4 14:41:21 2016 GMT: file ''/tmp/dumps/crash_20160104091456_1.dmp'', upload yes: ''CrashID=bp-06ada959-62ec-41c7-b74b-2b16d2160104''

makkenhoff_log.txt
makkenhoff_stdout.txt