Hello,

I got these messages on the screen after I not use the system (screensaver off), and the system totally freeze.
New install. How could I solve the problem? Have you any idea?

Thanks,

Desktop manager xfce.
01:00.0 VGA compatible controller: NVIDIA Corporation G86M [GeForce 8400M GS] (rev a1)
VGA driver: nvidia-legacy-344xx-driver

OS: Kali 2016 Rolling

root@kali:/var/log# uname -a
Linux kali 4.6.0-kali1-686-pae #1 SMP Debian 4.6.3-1kali1 (2016-07-12) i686 GNU/Linux

root@kali:/var/log# lsb_release -a
No LSB modules are available.
Distributor ID: Kali
Description: Kali GNU/Linux Rolling
Release: kali-rolling
Codename: kali-rolling

root@kali:/var/log# less syslog | grep perf
Jul 21 01:52:21 kali kernel: [ 343.707587] perf: interrupt took too long (2508 > 2500), lowering kernel.perf_event_max_sample_rate to 79500
Jul 21 01:54:31 kali kernel: [ 473.635966] perf: interrupt took too long (3154 > 3135), lowering kernel.perf_event_max_sample_rate to 63250
Jul 21 01:58:42 kali kernel: [ 724.822008] perf: interrupt took too long (3947 > 3942), lowering kernel.perf_event_max_sample_rate to 50500
Jul 21 02:04:00 kali kernel: [ 1043.109066] perf: interrupt took too long (4940 > 4933), lowering kernel.perf_event_max_sample_rate to 40250
Jul 21 02:31:53 kali kernel: [ 2715.980311] perf: interrupt took too long (6177 > 6175), lowering kernel.perf_event_max_sample_rate to 32250
Jul 21 03:27:58 kali kernel: [ 341.105985] perf: interrupt took too long (2517 > 2500), lowering kernel.perf_event_max_sample_rate to 79250
Jul 21 03:30:26 kali kernel: [ 488.475708] perf: interrupt took too long (3170 > 3146), lowering kernel.perf_event_max_sample_rate to 63000
Jul 21 03:37:37 kali kernel: [ 919.610319] perf: interrupt took too long (3976 > 3962), lowering kernel.perf_event_max_sample_rate to 50250
Jul 21 03:45:29 kali kernel: [ 1392.049748] perf: interrupt took too long (4977 > 4970), lowering kernel.perf_event_max_sample_rate to 40000
Jul 21 04:10:06 kali kernel: [ 2868.547790] perf: interrupt took too long (6247 > 6221), lowering kernel.perf_event_max_sample_rate to 32000
Jul 21 08:00:10 kali kernel: [ 420.175679] perf: interrupt took too long (2562 > 2500), lowering kernel.perf_event_max_sample_rate to 78000
Jul 21 08:02:24 kali kernel: [ 554.173740] perf: interrupt took too long (3215 > 3202), lowering kernel.perf_event_max_sample_rate to 62000
Jul 21 08:05:50 kali kernel: [ 760.634426] perf: interrupt took too long (4026 > 4018), lowering kernel.perf_event_max_sample_rate to 49500
Jul 21 08:12:23 kali kernel: [ 1153.295642] perf: interrupt took too long (5081 > 5032), lowering kernel.perf_event_max_sample_rate to 39250
Jul 21 08:34:57 kali kernel: [ 853.294057] perf: interrupt took too long (2510 > 2500), lowering kernel.perf_event_max_sample_rate to 79500
Jul 21 08:36:22 kali kernel: [ 939.021043] perf: interrupt took too long (3139 > 3137), lowering kernel.perf_event_max_sample_rate to 63500