System freeze/unusable

[ecor6633]

Hello,

I've setup in October a desktop running now : Linux 4.19.0-13-amd64 #1 SMP Debian 4.19.160-2 (2020-11-28) x86_64 GNU/Linux
From time to time it freezes or at least becomes unusable. Let me describe the symptoms.

Most of the time the UI (now fluxbox, but also tried KDE to make sure it was not desktop related) is still responding: I can move windows, switch workspaces aso. but I really notice the problem most of time by opening a new tab in a browser (whatever chrome or firefox) and notice that it never reach the page I'm trying to reach. But that's not the real problem because if I try then to open a new terminal tab it opens the window but the prompt never comes up so I can't start a new terminal in X.

To troubleshoot, I'm force to switch to console (CTRL+ALT+F1) and one of the biggest issue is that I can login, and obtain a prompt there but can't use sudo. If I start sudo it freeze and I can't do anything. Luckily if I'm in a screen I can create another prompt but even if I try to kill -9 the sudo process, nothing happens and it is still frozen.

I created a root password to be able to be root without using sudo so that I can troubleshoot a bit more but even as root I can htop and try to kill processes aso. kill -9 are not doing a lot.

I couldn't find anything interesting in syslog or messages, I can't find anything special that I would do to trigger the freeze and have no clue on what I could try. The worst is that even if I type reboot as root, the screen become lightblue but it stays like that more than 15min and I have to poweroff/on the computer to bring it back to life.

From what I've googled it could be some driver or something like that but I had already the problem using nouveau driver and recently switched to the nvidia driver because I now have two screens and nouveau wasn't happy (cracking noise all the time through HDMI) I hoped a minute that it could solve the issue but it came back. It doesn't mean we can reject the graphic drivers to be the cause but at least two of them have been tried.

The only "exotic" things I see in my desktop are a USB Wifi-card and a USB bluetooth adapter and I'm running 90% of the time an openvpn to be able to work from home.

Have you any advice on what I should/could do to determine the root cause.

[k829king]

check you free disk space with

Code: Select all

df -h

particularly the partition holding /var
I have got similar sounding issues in past when partitions for /home and or /var are running low on space

[ecor6633]

I still have 40G free and a single partition scheme so I would says it's ok.
By the way, why would poweroff/on improve the situation ?

Thanks for the proposal, I'll check anyway next time it freezes.

[Head_on_a_Stick]

Firmware & µcode? Memory health? SMART check?

And if in doubt blame the crappy NVIDIA blob — throw that POS graphics card away and buy an AMD one instead

[ecor6633]

I suspect more something with the network card or something like that because the GUI always respond very well.

I even discovered that when I run a xterm or konsole in fact there is a nvm script in my bashrc that hang but I can obtain a bash with CTRL+C and I can become root in the UI with "su" but not with "sudo".
I can use htop to kill many processes but even with the minimum running there are a lot of commands that fail. I can't use 'sudo' but also I can't use 'ip ad' and 'systemctl restart networking' hang for ever...

If someone understand what my dmesg said I think there could be somehting helpfull in there:

Code: Select all

[134988.905495] rtl_usb: reg 0x42, usbctrl_vendorreq TimeOut! status:0xffffff92 value=0x0
[134999.145450] rtl_usb: reg 0x4, usbctrl_vendorreq TimeOut! status:0xffffff92 value=0x27d0000
[135009.385530] rtl_usb: reg 0x4, usbctrl_vendorreq TimeOut! status:0xffffff92 value=0xd38000
[135019.625484] rtl_usb: reg 0x4, usbctrl_vendorreq TimeOut! status:0xffffff92 value=0x100
[135152.745656] rtl8192cu: MAC auto ON okay!
[135212.838438] INFO: task nmbd:927 blocked for more than 120 seconds.
[135212.838444]       Tainted: P           OE     4.19.0-13-amd64 #1 Debian 4.19.160-2
[135212.838446] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[135212.838448] nmbd            D    0   927      1 0x00000000
[135212.838451] Call Trace:
[135212.838460]  __schedule+0x29f/0x840
[135212.838464]  schedule+0x28/0x80
[135212.838466]  schedule_preempt_disabled+0xa/0x10
[135212.838468]  __mutex_lock.isra.8+0x2b5/0x4a0
[135212.838473]  ? __netlink_lookup+0xcd/0x130
[135212.838477]  __netlink_dump_start+0x56/0x1e0
[135212.838480]  ? rtnl_fill_ifinfo+0xeb0/0xeb0
[135212.838484]  rtnetlink_rcv_msg+0x22c/0x360
[135212.838487]  ? __switch_to_asm+0x41/0x70
[135212.838489]  ? rtnl_fill_ifinfo+0xeb0/0xeb0
[135212.838492]  ? rtnl_calcit.isra.31+0x100/0x100
[135212.838495]  netlink_rcv_skb+0x4c/0x120
[135212.838499]  netlink_unicast+0x181/0x210
[135212.838502]  netlink_sendmsg+0x204/0x3d0
[135212.838506]  sock_sendmsg+0x36/0x40
[135212.838508]  __sys_sendto+0xee/0x160
[135212.838514]  ? handle_mm_fault+0xd6/0x200
[135212.838518]  ? __do_page_fault+0x26c/0x4f0
[135212.838520]  __x64_sys_sendto+0x24/0x30
[135212.838525]  do_syscall_64+0x53/0x110
[135212.838528]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[135212.838531] RIP: 0033:0x7f587e63f9b7
[135212.838536] Code: Bad RIP value.
[135212.838538] RSP: 002b:00007ffcaeae2648 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[135212.838540] RAX: ffffffffffffffda RBX: 00007ffcaeae37a0 RCX: 00007f587e63f9b7
[135212.838541] RDX: 0000000000000014 RSI: 00007ffcaeae36e0 RDI: 0000000000000029
[135212.838542] RBP: 00007ffcaeae3730 R08: 00007ffcaeae36a0 R09: 000000000000000c
[135212.838543] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcaeae36a0
[135212.838545] R13: 00007ffcaeae2650 R14: 00007ffcaeae36e0 R15: 00000000ffffffff
[135212.838552] INFO: task nxserver.bin:962 blocked for more than 120 seconds.
[135212.838554]       Tainted: P           OE     4.19.0-13-amd64 #1 Debian 4.19.160-2
[135212.838556] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[135212.838557] nxserver.bin    D    0   962      1 0x00000000
[135212.838559] Call Trace:
[135212.838562]  __schedule+0x29f/0x840
[135212.838564]  schedule+0x28/0x80
[135212.838565]  schedule_preempt_disabled+0xa/0x10
[135212.838567]  __mutex_lock.isra.8+0x2b5/0x4a0
[135212.838570]  ? __netlink_lookup+0xcd/0x130
[135212.838574]  __netlink_dump_start+0x56/0x1e0
[135212.838575]  ? rtnl_fill_ifinfo+0xeb0/0xeb0
[135212.838578]  rtnetlink_rcv_msg+0x22c/0x360
[135212.838580]  ? rtnl_fill_ifinfo+0xeb0/0xeb0
[135212.838583]  ? rtnl_calcit.isra.31+0x100/0x100
[135212.838586]  netlink_rcv_skb+0x4c/0x120
[135212.838589]  netlink_unicast+0x181/0x210
[135212.838592]  netlink_sendmsg+0x204/0x3d0
[135212.838595]  sock_sendmsg+0x36/0x40
[135212.838597]  __sys_sendto+0xee/0x160
[135212.838600]  ? __sys_socket+0x93/0xe0
[135212.838602]  __x64_sys_sendto+0x24/0x30
[135212.838604]  do_syscall_64+0x53/0x110
[135212.838607]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[135212.838609] RIP: 0033:0x7f1222861a02
[135212.838612] Code: Bad RIP value.
[135212.838613] RSP: 002b:00007ffdbebcc390 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
[135212.838614] RAX: ffffffffffffffda RBX: 0000000000000018 RCX: 00007f1222861a02
[135212.838615] RDX: 0000000000000014 RSI: 00007ffdbebcd470 RDI: 0000000000000018
[135212.838616] RBP: 0000000000000000 R08: 00007ffdbebcd430 R09: 000000000000000c
[135212.838617] R10: 0000000000000000 R11: 0000000000000293 R12: 00007ffdbebcd470
[135212.838618] R13: 0000000000000014 R14: 0000000000000000 R15: 00007ffdbebcd430
[135212.838649] INFO: task Qt bearer threa:2367 blocked for more than 120 seconds.
[135212.838651]       Tainted: P           OE     4.19.0-13-amd64 #1 Debian 4.19.160-2
[135212.838652] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[135212.838654] Qt bearer threa D    0  2367   2186 0x00000000
[135212.838655] Call Trace:
[135212.838658]  __schedule+0x29f/0x840
[135212.838659]  ? rtnl_fill_ifinfo+0xeb0/0xeb0
[135212.838661]  schedule+0x28/0x80
[135212.838663]  schedule_preempt_disabled+0xa/0x10
[135212.838665]  __mutex_lock.isra.8+0x2b5/0x4a0
[135212.838668]  netlink_dump+0x1c/0x2a0
[135212.838672]  netlink_recvmsg+0x257/0x420
[135212.838675]  __sys_recvfrom+0x162/0x180
[135212.838679]  ? aa_sk_perm+0x31/0x120
[135212.838681]  ? __sys_setsockopt+0xb6/0xe0
[135212.838683]  __x64_sys_recvfrom+0x24/0x30
[135212.838686]  do_syscall_64+0x53/0x110
[135212.838688]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[135212.838690] RIP: 0033:0x7f32b357a686
[135212.838692] Code: Bad RIP value.
[135212.838693] RSP: 002b:00007f32a2ffbcb0 EFLAGS: 00000246 ORIG_RAX: 000000000000002d
[135212.838695] RAX: ffffffffffffffda RBX: 0000000000000012 RCX: 00007f32b357a686
[135212.838696] RDX: 0000000000002000 RSI: 00007f329802be38 RDI: 0000000000000012
[135212.838697] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[135212.838698] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f329802be38
[135212.838699] R13: 0000000000002000 R14: 0000000000000000 R15: 00007f32a2ffbd80
[135212.838702] INFO: task Qt bearer threa:2378 blocked for more than 120 seconds.
[135212.838704]       Tainted: P           OE     4.19.0-13-amd64 #1 Debian 4.19.160-2
[135212.838705] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[135212.838707] Qt bearer threa D    0  2378   2186 0x00000000
[135212.838708] Call Trace:
[135212.838710]  __schedule+0x29f/0x840
[135212.838712]  ? rtnl_fill_ifinfo+0xeb0/0xeb0
[135212.838714]  schedule+0x28/0x80
[135212.838715]  schedule_preempt_disabled+0xa/0x10
[135212.838717]  __mutex_lock.isra.8+0x2b5/0x4a0
[135212.838721]  netlink_dump+0x1c/0x2a0
[135212.838723]  netlink_recvmsg+0x257/0x420
[135212.838726]  __sys_recvfrom+0x162/0x180
[135212.838729]  ? aa_sk_perm+0x31/0x120
[135212.838732]  ? __sys_setsockopt+0xb6/0xe0
[135212.838734]  __x64_sys_recvfrom+0x24/0x30
[135212.838736]  do_syscall_64+0x53/0x110
[135212.838738]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[135212.838739] RIP: 0033:0x7ff405860686
[135212.838742] Code: Bad RIP value.
[135212.838743] RSP: 002b:00007ff3e6dec630 EFLAGS: 00000246 ORIG_RAX: 000000000000002d
[135212.838744] RAX: ffffffffffffffda RBX: 000000000000001b RCX: 00007ff405860686
[135212.838746] RDX: 0000000000002000 RSI: 00007ff3d402d598 RDI: 000000000000001b
[135212.838747] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[135212.838747] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff3d402d598
[135212.838748] R13: 0000000000002000 R14: 0000000000000000 R15: 00007ff3e6dec700
[135212.838754] INFO: task Qt bearer threa:2373 blocked for more than 120 seconds.
[135212.838756]       Tainted: P           OE     4.19.0-13-amd64 #1 Debian 4.19.160-2
[135212.838757] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[135212.838759] Qt bearer threa D    0  2373   2186 0x00000000
[135212.838760] Call Trace:
[135212.838763]  __schedule+0x29f/0x840
[135212.838764]  ? rtnl_fill_ifinfo+0xeb0/0xeb0
[135212.838766]  schedule+0x28/0x80
[135212.838768]  schedule_preempt_disabled+0xa/0x10
[135212.838770]  __mutex_lock.isra.8+0x2b5/0x4a0
[135212.838773]  netlink_dump+0x1c/0x2a0
[135212.838776]  netlink_recvmsg+0x257/0x420
[135212.838779]  __sys_recvfrom+0x162/0x180
[135212.838782]  ? aa_sk_perm+0x31/0x120
[135212.838784]  ? __sys_setsockopt+0xb6/0xe0
[135212.838786]  __x64_sys_recvfrom+0x24/0x30
[135212.838788]  do_syscall_64+0x53/0x110
[135212.838790]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[135212.838791] RIP: 0033:0x7f2762793686
[135212.838794] Code: Bad RIP value.
[135212.838795] RSP: 002b:00007f2751e3ccb0 EFLAGS: 00000246 ORIG_RAX: 000000000000002d
[135212.838796] RAX: ffffffffffffffda RBX: 0000000000000014 RCX: 00007f2762793686
[135212.838797] RDX: 0000000000002000 RSI: 00007f274802d708 RDI: 0000000000000014
[135212.838798] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[135212.838799] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f274802d708
[135212.838800] R13: 0000000000002000 R14: 0000000000000000 R15: 00007f2751e3cd80
[135212.838804] INFO: task Qt bearer threa:2377 blocked for more than 120 seconds.
[135212.838806]       Tainted: P           OE     4.19.0-13-amd64 #1 Debian 4.19.160-2
[135212.838807] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[135212.838808] Qt bearer threa D    0  2377   2186 0x00000000
[135212.838810] Call Trace:
[135212.838812]  __schedule+0x29f/0x840
[135212.838814]  schedule+0x28/0x80
[135212.838816]  schedule_preempt_disabled+0xa/0x10
[135212.838817]  __mutex_lock.isra.8+0x2b5/0x4a0
[135212.838821]  wext_handle_ioctl+0x7d/0x100
[135212.838826]  sock_ioctl+0x1ab/0x320
[135212.838828]  ? __sys_recvfrom+0x120/0x180
[135212.838831]  do_vfs_ioctl+0xa4/0x630
[135212.838834]  ? aa_sk_perm+0x31/0x120
[135212.838836]  ksys_ioctl+0x60/0x90
[135212.838838]  __x64_sys_ioctl+0x16/0x20
[135212.838841]  do_syscall_64+0x53/0x110
[135212.838843]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[135212.838844] RIP: 0033:0x7fda58e1e427
[135212.838847] Code: Bad RIP value.
[135212.838848] RSP: 002b:00007fda46ffbae8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[135212.838849] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fda58e1e427
[135212.838850] RDX: 00007fda46ffbba0 RSI: 0000000000008b07 RDI: 0000000000000016
[135212.838851] RBP: 00007fda3802f358 R08: 00007fda3802c040 R09: 000000000000003c
[135212.838852] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fda3802ee3c
[135212.838853] R13: 00007fda3802ee2c R14: 00007fda3802b340 R15: 00000000000002f8
[135212.838856] INFO: task Qt bearer threa:2385 blocked for more than 120 seconds.
[135212.838858]       Tainted: P           OE     4.19.0-13-amd64 #1 Debian 4.19.160-2
[135212.838859] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[135212.838861] Qt bearer threa D    0  2385   2186 0x00000000
[135212.838862] Call Trace:
[135212.838864]  __schedule+0x29f/0x840
[135212.838866]  schedule+0x28/0x80
[135212.838868]  schedule_preempt_disabled+0xa/0x10
[135212.838869]  __mutex_lock.isra.8+0x2b5/0x4a0
[135212.838873]  netlink_dump+0x1c/0x2a0
[135212.838876]  netlink_recvmsg+0x257/0x420
[135212.838879]  __sys_recvfrom+0x162/0x180
[135212.838881]  ? aa_sk_perm+0x31/0x120
[135212.838883]  ? __sys_setsockopt+0xb6/0xe0
[135212.838886]  __x64_sys_recvfrom+0x24/0x30
[135212.838888]  do_syscall_64+0x53/0x110
[135212.838890]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[135212.838891] RIP: 0033:0x7f237821a686
[135212.838894] Code: Bad RIP value.
[135212.838895] RSP: 002b:00007f235cb27630 EFLAGS: 00000246 ORIG_RAX: 000000000000002d
[135212.838896] RAX: ffffffffffffffda RBX: 000000000000001a RCX: 00007f237821a686
[135212.838897] RDX: 0000000000002000 RSI: 00007f234802c428 RDI: 000000000000001a
[135212.838898] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[135212.838899] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f234802c428
[135212.838900] R13: 0000000000002000 R14: 0000000000000000 R15: 00007f235cb27700
[135212.838910] INFO: task ThreadPoolForeg:32057 blocked for more than 120 seconds.
[135212.838912]       Tainted: P           OE     4.19.0-13-amd64 #1 Debian 4.19.160-2
[135212.838913] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[135212.838915] ThreadPoolForeg D    0 32057   2759 0x00000000
[135212.838916] Call Trace:
[135212.838919]  __schedule+0x29f/0x840
[135212.838921]  ? __switch_to_asm+0x35/0x70
[135212.838923]  ? __switch_to_asm+0x41/0x70
[135212.838925]  schedule+0x28/0x80
[135212.838926]  schedule_preempt_disabled+0xa/0x10
[135212.838928]  __mutex_lock.isra.8+0x2b5/0x4a0
[135212.838931]  ? __netlink_lookup+0xcd/0x130
[135212.838934]  __netlink_dump_start+0x56/0x1e0
[135212.838937]  ? rtnl_xdp_prog_skb+0x60/0x60
[135212.838940]  rtnetlink_rcv_msg+0x22c/0x360
[135212.838943]  ? rtnl_xdp_prog_skb+0x60/0x60
[135212.838945]  ? rtnl_calcit.isra.31+0x100/0x100
[135212.838948]  netlink_rcv_skb+0x4c/0x120
[135212.838952]  netlink_unicast+0x181/0x210
[135212.838955]  netlink_sendmsg+0x204/0x3d0
[135212.838957]  sock_sendmsg+0x36/0x40
[135212.838959]  __sys_sendto+0xee/0x160
[135212.838963]  ? __sys_socket+0x93/0xe0
[135212.838965]  __x64_sys_sendto+0x24/0x30
[135212.838967]  do_syscall_64+0x53/0x110
[135212.838970]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[135212.838971] RIP: 0033:0x7f4683305a02
[135212.838973] Code: Bad RIP value.
[135212.838974] RSP: 002b:00007f467aed1da0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
[135212.838976] RAX: ffffffffffffffda RBX: 000000000000001c RCX: 00007f4683305a02
[135212.838977] RDX: 0000000000000011 RSI: 00007f467aed1e00 RDI: 000000000000001c
[135212.838978] RBP: 0000000000000000 R08: 00007f467aed1df0 R09: 000000000000000c
[135212.838979] R10: 0000000000000000 R11: 0000000000000293 R12: 00007f467aed1e00
[135212.838980] R13: 0000000000000011 R14: 0000000000000000 R15: 00007f467aed1df0
[135212.839006] INFO: task Qt bearer threa:6175 blocked for more than 120 seconds.
[135212.839007]       Tainted: P           OE     4.19.0-13-amd64 #1 Debian 4.19.160-2
[135212.839009] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[135212.839010] Qt bearer threa D    0  6175   1996 0x00000000
[135212.839011] Call Trace:
[135212.839014]  __schedule+0x29f/0x840
[135212.839015]  ? rtnl_fill_ifinfo+0xeb0/0xeb0
[135212.839017]  schedule+0x28/0x80
[135212.839019]  schedule_preempt_disabled+0xa/0x10
[135212.839020]  __mutex_lock.isra.8+0x2b5/0x4a0
[135212.839024]  netlink_dump+0x1c/0x2a0
[135212.839027]  netlink_recvmsg+0x257/0x420
[135212.839030]  __sys_recvfrom+0x162/0x180
[135212.839033]  ? aa_sk_perm+0x31/0x120
[135212.839034]  ? __sys_setsockopt+0xb6/0xe0
[135212.839037]  __x64_sys_recvfrom+0x24/0x30
[135212.839039]  do_syscall_64+0x53/0x110
[135212.839041]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[135212.839042] RIP: 0033:0x7f3dc3c50686
[135212.839045] Code: Bad RIP value.
[135212.839046] RSP: 002b:00007f3db9777cb0 EFLAGS: 00000246 ORIG_RAX: 000000000000002d
[135212.839047] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 00007f3dc3c50686
[135212.839048] RDX: 0000000000002000 RSI: 00007f3db002e948 RDI: 000000000000000f
[135212.839049] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[135212.839050] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3db002e948
[135212.839051] R13: 0000000000002000 R14: 0000000000000000 R15: 00007f3db9777d80
[135212.839074] INFO: task kworker/4:0:28766 blocked for more than 120 seconds.
[135212.839076]       Tainted: P           OE     4.19.0-13-amd64 #1 Debian 4.19.160-2
[135212.839077] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[135212.839079] kworker/4:0     D    0 28766      2 0x80000000
[135212.839084] Workqueue: ipv6_addrconf addrconf_verify_work
[135212.839085] Call Trace:
[135212.839087]  __schedule+0x29f/0x840
[135212.839089]  ? __switch_to_asm+0x35/0x70
[135212.839092]  ? __switch_to_asm+0x41/0x70
[135212.839093]  schedule+0x28/0x80
[135212.839095]  schedule_preempt_disabled+0xa/0x10
[135212.839097]  __mutex_lock.isra.8+0x2b5/0x4a0
[135212.839099]  ? __switch_to_asm+0x35/0x70
[135212.839101]  addrconf_verify_work+0xa/0x20
[135212.839106]  process_one_work+0x1a7/0x3a0
[135212.839110]  worker_thread+0x30/0x390
[135212.839113]  ? create_worker+0x1a0/0x1a0
[135212.839115]  kthread+0x112/0x130
[135212.839118]  ? kthread_bind+0x30/0x30
[135212.839121]  ret_from_fork+0x35/0x40
[138316.909683] rtl8192cu: Tx queue select: 0x05

Today I've unplugged the wifi-usb adapter and will try to live without for a while seeing if it could be the cause and if necessary I can plug a usb RJ45 network adapter to avoid the one on the motherboard if it can help... Let's cross the fingers.

[Head_on_a_Stick]

You need the debugging symbols to create a useful backtrace but your kernel is tainted by the NVIDIA blob so that will confuse this issue.

https://wiki.debian.org/HowToGetABacktrace

[ecor6633]

After a few days with the USB wifi adapter unplugged I haven't experienced any freeze.

I really think it is the was my Netgear WNA3100M that was causing the problem.