Hello, I just arrived to this bug and read all posts, took me 5 hours
yet to compile a summary:
Summary of ideas that seem to have fixed, or improved the situation of some
people:
#91 (install kernel 3.3.6)
#112 (choose the right nouveau driver)
#117 (install kernel 3.4.0)
#165 (sudo intel_reg_write 0x2120 '0x1206800' in /etc/rc.local)
#279 (USB ports)
#321 (combination of i915.i915_enable_rc6=0 and i915.i915_enable_fbc=0) (also
in #349)
#336 (disable monitor power management)
#370 (Win7 dual boot)
#373 (use flash aid)
#429 (stop OS fan management)
Summary of the 3 types of bugs:
(Sorry, I might definitely be wrong, the amount of information is too large for
my poor brain, I still spend quite some time reading the 430 posts, and
re-reading many)
bug 1) bug that freezes the graphics, but the mouse pointer is still moving
most can still access the console ctrl-alt-F1, but not always...
can reboot through CTRL+ALT+SysRq REISUB
typically happens once every 5 to 20 min, impossible to work (sometimes once
a day: #20, sometimes at boot time: #79)
looks strongly correlated to Nvidia proprietary drivers (many cases), but
may also affects Nouveau drivers (#3, #20, #79, #149)
moving to the console may hard-freeze it all
it looks like there is nothing in /var/log/syslog
Posts describe solutions by:
- #112 (choose the right nouveau driver)
Changing kernel doesn't seems to help
These people should join this bug:
Nvidia, Complete freezes with only mouse pointer still moving (Please
read #425 for more precise)
https://bugs.launchpad.net/bugs/1033263
bug 2) bug that freezes graphics and mouse
last sound sample repeated continuously
no mouse, no keyboard, no ctrl-alt-SysRq REISUB
only reports about ssh not working, one post about ping working
typically happens once every 1 to 8 hours
looks correlated to SandyBridge and IvyBridge, but also affects people with:
AMD Fusion (#373), Nvidia Nouveau (#277), ATI Radeon graphics with flgrx
drivers (#49)
some people have things in /var/log/syslog
might loose data
Posts describe solutions by:
- using kernel 3.3.6 (#91), many success, but not always (see #120)
- using kernel 3.4.0 (#117)
- combination of i915.i915_enable_rc6=0 and i915.i915_enable_fbc=0
(#321), many success, but one (#401)
- using Debian 6.0.5 (#124)
These people should join this bug:
IvyBridge, 64 bit System freezes (mouse, keyboard) (see #308)
https://bugs.launchpad.net/bugs/999910
Other comments:
- Problem persists with regular Unity and Unity 2D desktop.
- Problem does NOT occurr when using old Nvidia 8400GS discrete graphics
card.
bug 3) bug that freezes graphics, but can still access the console ctrl-alt-F1
post GC occurrence (5/6 ATI & 1/6 Xeon): ATI RV515GL, no proprietary driver;
ATI Radeon X1400; ATI X1400; radeon X2300; Radeon HD 3200; VGA Xeon E3-1200
Processor Family Integrated Graphics Controller
mouse might or might not move
might completely freeze when going back to X
might be related to compiz (#12)
might loose data
Interesting comments:
- Still freezing, both with kernel 3.2.0.24 and kernel 3.3.6.
These people should create a new bug report.
Obviously this is not complete, since other people fixed their problems
using other ways... crazy bug!
Since I'm trying to have a full summary, here is another broad bug report for
the records:
Kernel Hard Freezing Very Often (see #279)
https://bugs.launchpad.net/bugs/908335
More generally, as both an (external) programmer and an Ubuntu user I have to
agree this is both:
- very very hard to track down where it can come from (the variety of messages
is incredible)
- very very annoying this critical bug is not yet fixed (two month and you
can't work well)
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https://bugs.launchpad.net/bugs/993187
Title:
ubuntu 12.04 completely freezes frequently.
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