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[Allen Chemist <mitchese@xxxxxxxxx>]

I am currently experiencing this issue which goes beyond sound on my
system.  I can reliably re-create the issue by playing about 3 or 4
minutes of music, however once started the whole system stops without
input.  This includes screen updates (to the system monitor pannel
applet), music and network traffic.

I have noticed in addition to moving the mouse or pressing any key
(including modifiers like Shift), downloading items off the internet
temporarily solves the problem.  I noticed this as the problem didn't
happen while the latest updates were downloading in the background.  As
soon as the download stopped and the installation began, the music began
to skip and the installation would stall until input was given.

I have done the following tests with the following results.

Test 1: Recreate base issue.  Restart computer normally, and play music.
After 3-4 minutes the music and system begin to skip.  Open a terminal
and try to ping.  As long as input is present on the keyboard or the
mouse, the music and ping work correctly.  As soon as input is stopped,
music and ping stops.  Even without music playing, ping does not
continue unless input is given.

Test 2: Test in single mode without graphical user interface.  Restart
the computer and boot into recovery mode.  Choose root shell with
network, and play music using mplayer off the command prompt.  Again,
after 3-4 minutes the music begins to skip.  Quitting mplayer and
attempting ping also results in ping hanging until input is given.
While in terminal mode, moving the mouse does not alleviate the issue.

My hardware is an HP G62 laptop with the following items
mitchese@mosasaur:~$ lspci
00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev 07)
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
00:1a.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 03)
00:1a.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 03)
00:1a.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 03)
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 03)
00:1c.1 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 2 (rev 03)
00:1d.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 03)
00:1d.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 03)
00:1d.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 03)
00:1d.3 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 03)
00:1d.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 93)
00:1f.0 ISA bridge: Intel Corporation ICH9M LPC Interface Controller (rev 03)
00:1f.2 SATA controller: Intel Corporation ICH9M/M-E SATA AHCI Controller (rev 03)
00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 03)
00:1f.6 Signal processing controller: Intel Corporation 82801I (ICH9 Family) Thermal Subsystem (rev 03)
02:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8191SEvA Wireless LAN Controller (rev 10)
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 02)
mitchese@mosasaur:~$ 
mitchese@mosasaur:~$ lsmod
Module                  Size  Used by
cryptd                  8140  0 
aes_x86_64              7936  166 
aes_generic            27631  1 aes_x86_64
parport_pc             30086  0 
ppdev                   6804  0 
dm_crypt               13381  0 
binfmt_misc             7984  1 
joydev                 11363  0 
rfcomm                 40755  4 
sco                     9954  2 
bnep                   11985  2 
l2cap                  42304  16 rfcomm,bnep
snd_hda_codec_intelhdmi    11032  1 
snd_hda_codec_realtek   299533  1 
snd_hda_intel          26019  2 
snd_hda_codec         100919  3 snd_hda_codec_intelhdmi,snd_hda_codec_realtek,snd_hda_intel
snd_hwdep               6660  1 snd_hda_codec
snd_pcm                89104  2 snd_hda_intel,snd_hda_codec
snd_seq_midi            5932  0 
snd_rawmidi            22207  1 snd_seq_midi
snd_seq_midi_event      7291  1 snd_seq_midi
snd_seq                57512  2 snd_seq_midi,snd_seq_midi_event
btusb                  12929  2 
snd_timer              23850  2 snd_pcm,snd_seq
snd_seq_device          6912  3 snd_seq_midi,snd_rawmidi,snd_seq
hp_wmi                  6435  0 
uvcvideo               62379  0 
videodev               49359  1 uvcvideo
v4l1_compat            15519  2 uvcvideo,videodev
v4l2_compat_ioctl32    12486  1 videodev
bluetooth              59213  9 rfcomm,sco,bnep,l2cap,btusb
snd                    64117  13 snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
psmouse                62080  0 
r8192se_pci           507324  0 
serio_raw               4910  0 
soundcore               1240  1 snd
snd_page_alloc          8588  2 snd_hda_intel,snd_pcm
lp                     10201  0 
parport                37032  3 parport_pc,ppdev,lp
usbhid                 42062  0 
hid                    84678  1 usbhid
usb_storage            50372  0 
i915                  330249  3 
r8169                  42222  0 
drm_kms_helper         32836  1 i915
drm                   206161  4 i915,drm_kms_helper
ahci                   21857  0 
libahci                26167  3 ahci
mii                     5261  1 r8169
i2c_algo_bit            6208  1 i915
video                  22176  1 i915
output                  2527  1 video
intel_agp              32080  2 i915
mitchese@mosasaur:~$ 

dmesg and strace don't show anything obvious to me.  I am recreating the
issue using music as it is the fastest way I can cause the issue, but I
suspect it could be recreated with other things that don't involve
input.

-- 
User interface stutters / laggy when mouse NOT moving
https://bugs.launchpad.net/bugs/661327
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