I also experience this problem. I've been having it for a while. Logging out and logging in again temporarily fixes the issue. Affects both KDE and Gnome. Got this in /var/log/syslog when the problem happened just now:
Mar 31 21:57:54 dreadnought kernel: [ 2390.058249] irq 16: nobody cared (try booting with the "irqpoll" option)
Mar 31 21:57:54 dreadnought kernel: [ 2390.058253] CPU: 0 PID: 0 Comm: swapper/0 Tainted: PF O 3.11.0-18-generic #32-Ubuntu
Mar 31 21:57:54 dreadnought kernel: [ 2390.058254] Hardware name: System manufacturer System Product Name/P8P67-M, BIOS 1501 08/30/2011
Mar 31 21:57:54 dreadnought kernel: [ 2390.058255] ffff880400974c9c ffff880417403e68 ffffffff816e8571 ffff880400974c00
Mar 31 21:57:54 dreadnought kernel: [ 2390.058257] ffff880417403e90 ffffffff810f88e2 ffff880400974c00 0000000000000010
Mar 31 21:57:54 dreadnought kernel: [ 2390.058259] 0000000000000000 ffff880417403ed0 ffffffff810f8d11 ffffffff815a158f
Mar 31 21:57:54 dreadnought kernel: [ 2390.058261] Call Trace:
Mar 31 21:57:54 dreadnought kernel: [ 2390.058262] <IRQ> [<ffffffff816e8571>] dump_stack+0x45/0x56
Mar 31 21:57:54 dreadnought kernel: [ 2390.058270] [<ffffffff810f88e2>] __report_bad_irq+0x32/0xd0
Mar 31 21:57:54 dreadnought kernel: [ 2390.058271] [<ffffffff810f8d11>] note_interrupt+0x141/0x200
Mar 31 21:57:54 dreadnought kernel: [ 2390.058274] [<ffffffff815a158f>] ? cpuidle_enter_state+0x4f/0xc0
Mar 31 21:57:54 dreadnought kernel: [ 2390.058276] [<ffffffff810f6681>] handle_irq_event_percpu+0xe1/0x1e0
Mar 31 21:57:54 dreadnought kernel: [ 2390.058277] [<ffffffff810f67bf>] handle_irq_event+0x3f/0x60
Mar 31 21:57:54 dreadnought kernel: [ 2390.058279] [<ffffffff810f988a>] handle_fasteoi_irq+0x5a/0x100
Mar 31 21:57:54 dreadnought kernel: [ 2390.058283] [<ffffffff81014b8e>] handle_irq+0x1e/0x30
Mar 31 21:57:54 dreadnought kernel: [ 2390.058285] [<ffffffff816fa70d>] do_IRQ+0x4d/0xc0
Mar 31 21:57:54 dreadnought kernel: [ 2390.058287] [<ffffffff816efd6d>] common_interrupt+0x6d/0x6d
Mar 31 21:57:54 dreadnought kernel: [ 2390.058288] <EOI> [<ffffffff815a158f>] ? cpuidle_enter_state+0x4f/0xc0
Mar 31 21:57:54 dreadnought kernel: [ 2390.058291] [<ffffffff815a1588>] ? cpuidle_enter_state+0x48/0xc0
Mar 31 21:57:54 dreadnought kernel: [ 2390.058293] [<ffffffff815a16c9>] cpuidle_idle_call+0xc9/0x210
Mar 31 21:57:54 dreadnought kernel: [ 2390.058295] [<ffffffff8101bafe>] arch_cpu_idle+0xe/0x30
Mar 31 21:57:54 dreadnought kernel: [ 2390.058298] [<ffffffff810b5825>] cpu_startup_entry+0xe5/0x280
Mar 31 21:57:54 dreadnought kernel: [ 2390.058300] [<ffffffff816d7767>] rest_init+0x77/0x80
Mar 31 21:57:54 dreadnought kernel: [ 2390.058303] [<ffffffff81d26ef7>] start_kernel+0x40a/0x416
Mar 31 21:57:54 dreadnought kernel: [ 2390.058305] [<ffffffff81d268f6>] ? repair_env_string+0x5c/0x5c
Mar 31 21:57:54 dreadnought kernel: [ 2390.058307] [<ffffffff81d26120>] ? early_idt_handlers+0x120/0x120
Mar 31 21:57:54 dreadnought kernel: [ 2390.058309] [<ffffffff81d265de>] x86_64_start_reservations+0x2a/0x2c
Mar 31 21:57:54 dreadnought kernel: [ 2390.058310] [<ffffffff81d266e8>] x86_64_start_kernel+0x108/0x117
Mar 31 21:57:54 dreadnought kernel: [ 2390.058311] handlers:
Mar 31 21:57:54 dreadnought kernel: [ 2390.058323] [<ffffffffa0064490>] e1000_intr [e1000]
Mar 31 21:57:54 dreadnought kernel: [ 2390.058373] [<ffffffffa0797a70>] nv_kern_isr [nvidia]
Mar 31 21:57:54 dreadnought kernel: [ 2390.058374] Disabling IRQ #16
I also experience this problem. I've been having it for a while. Logging out and logging in again temporarily fixes the issue. Affects both KDE and Gnome. Got this in /var/log/syslog when the problem happened just now:
Mar 31 21:57:54 dreadnought kernel: [ 2390.058249] irq 16: nobody cared (try booting with the "irqpoll" option) 571>] dump_stack+ 0x45/0x56 8e2>] __report_ bad_irq+ 0x32/0xd0 d11>] note_interrupt+ 0x141/0x200 58f>] ? cpuidle_ enter_state+ 0x4f/0xc0 681>] handle_ irq_event_ percpu+ 0xe1/0x1e0 7bf>] handle_ irq_event+ 0x3f/0x60 88a>] handle_ fasteoi_ irq+0x5a/ 0x100 b8e>] handle_ irq+0x1e/ 0x30 70d>] do_IRQ+0x4d/0xc0 d6d>] common_ interrupt+ 0x6d/0x6d 58f>] ? cpuidle_ enter_state+ 0x4f/0xc0 588>] ? cpuidle_ enter_state+ 0x48/0xc0 6c9>] cpuidle_ idle_call+ 0xc9/0x210 afe>] arch_cpu_ idle+0xe/ 0x30 825>] cpu_startup_ entry+0xe5/ 0x280 767>] rest_init+0x77/0x80 ef7>] start_kernel+ 0x40a/0x416 8f6>] ? repair_ env_string+ 0x5c/0x5c 120>] ? early_idt_ handlers+ 0x120/0x120 5de>] x86_64_ start_reservati ons+0x2a/ 0x2c 6e8>] x86_64_ start_kernel+ 0x108/0x117 490>] e1000_intr [e1000] a70>] nv_kern_isr [nvidia]
Mar 31 21:57:54 dreadnought kernel: [ 2390.058253] CPU: 0 PID: 0 Comm: swapper/0 Tainted: PF O 3.11.0-18-generic #32-Ubuntu
Mar 31 21:57:54 dreadnought kernel: [ 2390.058254] Hardware name: System manufacturer System Product Name/P8P67-M, BIOS 1501 08/30/2011
Mar 31 21:57:54 dreadnought kernel: [ 2390.058255] ffff880400974c9c ffff880417403e68 ffffffff816e8571 ffff880400974c00
Mar 31 21:57:54 dreadnought kernel: [ 2390.058257] ffff880417403e90 ffffffff810f88e2 ffff880400974c00 0000000000000010
Mar 31 21:57:54 dreadnought kernel: [ 2390.058259] 0000000000000000 ffff880417403ed0 ffffffff810f8d11 ffffffff815a158f
Mar 31 21:57:54 dreadnought kernel: [ 2390.058261] Call Trace:
Mar 31 21:57:54 dreadnought kernel: [ 2390.058262] <IRQ> [<ffffffff816e8
Mar 31 21:57:54 dreadnought kernel: [ 2390.058270] [<ffffffff810f8
Mar 31 21:57:54 dreadnought kernel: [ 2390.058271] [<ffffffff810f8
Mar 31 21:57:54 dreadnought kernel: [ 2390.058274] [<ffffffff815a1
Mar 31 21:57:54 dreadnought kernel: [ 2390.058276] [<ffffffff810f6
Mar 31 21:57:54 dreadnought kernel: [ 2390.058277] [<ffffffff810f6
Mar 31 21:57:54 dreadnought kernel: [ 2390.058279] [<ffffffff810f9
Mar 31 21:57:54 dreadnought kernel: [ 2390.058283] [<ffffffff81014
Mar 31 21:57:54 dreadnought kernel: [ 2390.058285] [<ffffffff816fa
Mar 31 21:57:54 dreadnought kernel: [ 2390.058287] [<ffffffff816ef
Mar 31 21:57:54 dreadnought kernel: [ 2390.058288] <EOI> [<ffffffff815a1
Mar 31 21:57:54 dreadnought kernel: [ 2390.058291] [<ffffffff815a1
Mar 31 21:57:54 dreadnought kernel: [ 2390.058293] [<ffffffff815a1
Mar 31 21:57:54 dreadnought kernel: [ 2390.058295] [<ffffffff8101b
Mar 31 21:57:54 dreadnought kernel: [ 2390.058298] [<ffffffff810b5
Mar 31 21:57:54 dreadnought kernel: [ 2390.058300] [<ffffffff816d7
Mar 31 21:57:54 dreadnought kernel: [ 2390.058303] [<ffffffff81d26
Mar 31 21:57:54 dreadnought kernel: [ 2390.058305] [<ffffffff81d26
Mar 31 21:57:54 dreadnought kernel: [ 2390.058307] [<ffffffff81d26
Mar 31 21:57:54 dreadnought kernel: [ 2390.058309] [<ffffffff81d26
Mar 31 21:57:54 dreadnought kernel: [ 2390.058310] [<ffffffff81d26
Mar 31 21:57:54 dreadnought kernel: [ 2390.058311] handlers:
Mar 31 21:57:54 dreadnought kernel: [ 2390.058323] [<ffffffffa0064
Mar 31 21:57:54 dreadnought kernel: [ 2390.058373] [<ffffffffa0797
Mar 31 21:57:54 dreadnought kernel: [ 2390.058374] Disabling IRQ #16
willz@dreadnoug ht:/proc$ cat interrupts | grep 16:
16: 600008 0 0 0 IO-APIC-fasteoi eth1, nvidia
willz@dreadnoug ht:/var/ log$ uname -a
Linux dreadnought 3.11.0-18-generic #32-Ubuntu SMP Tue Feb 18 21:11:14 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
willz@dreadnoug ht:/var/ log$ nvidia-settings -v themes/ Blumix1. 0/gtk-2. 0/gtkrc: 580: Unable to locate image file in pixmap_path: "transparent_ dot.png" themes/ Blumix1. 0/gtk-2. 0/gtkrc: 583: Background image options specified without filename
/usr/share/
/usr/share/
nvidia-settings: version 304.88 (buildd@panlong) Thu Jul 11 10:40:14 UTC 2013
The NVIDIA X Server Settings tool.
This program is used to configure the NVIDIA Linux graphics driver.
For more detail, please see the nvidia-settings(1) man page.
Copyright (C) 2004 - 2010 NVIDIA Corporation.
Let me know if you want more information. This issue bugs me a lot.