Update:
I logged into my system using another laptop and ran straces on xorg.
I saw tons of loops of these calls during the freezes:
10:19:35.422974 writev(54,
[{"\1\0\333\r\6\0\0\0\312\7\3\0\360\0\32\0\34\10\3\0h\10\35"..., 56}], 1) = 56
10:19:35.424835 clock_gettime(CLOCK_MONOTONIC, {44940, 658485608}) = 0
10:19:35.424961 setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 0}},
NULL) = 0
10:19:35.425092 select(256, [1 3 5 12 16 17 18 19 30 35 46 47 48 49 50 51 52 53
54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 74 76 77 78], NULL, NULL,
{50, 772000}) = 1 (in [54], left {50, 772000})
10:19:35.425335 setitimer(ITIMER_REAL, {it_interval={0, 20000}, it_value={0,
20000}}, NULL) = 0
10:19:35.425464 clock_gettime(CLOCK_MONOTONIC, {44940, 659106144}) = 0
10:19:35.425581 read(54, "\232\n\2\0\204\343,\1", 4096) = 8
10:19:35.425713 read(54, 0xb5e7ca8, 4096) = -1 EAGAIN (Resource temporarily
unavailable)
% time seconds usecs/call calls errors syscall
------ ----------- ----------- --------- --------- ----------------
74.81 0.019764 1 17968 47 select
5.83 0.001541 5 294 ioctl
5.53 0.001461 0 11397 1355 read
5.39 0.001423 109 13 munmap
3.75 0.000990 0 4206 gettimeofday
1.74 0.000459 0 3140 setitimer
1.08 0.000285 0 6555 clock_gettime
0.71 0.000187 4 47 poll
0.42 0.000110 8 13 mmap2
0.40 0.000107 0 10728 write
0.27 0.000072 0 1787 writev
0.08 0.000021 0 5834 62 sigreturn
0.00 0.000000 0 3210 rt_sigprocmask
------ ----------- ----------- --------- --------- ----------------
100.00 0.026420 65192 1464 total
So it appeared to me that something was unavailable to the system.
Debugging X.org gave me a loop inside the nvidia_drv module.
I was already at the current version by Ubuntu, 177.80. So checked
nVidia's site for their beta driver 180.06. Figured trying it wouldn't
hurt. To my surprise, 180.06 fixed my problems. I now can load that
website in fraction of a second. Tab switching works as expected also.
CPU Usage is back below 10% now also.
But be aware, this fix it for me and is going to be unsupported by both
Ubuntu and nVidia (beta driver).
--
xorg 10-20% cpu usage after intrepid upgrade, general system sluggishness
https://bugs.launchpad.net/bugs/294972
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