[Bug 650423] [NEW] total freeze when downloading (ubuntu 9.10, 10.04, 10.10, debian squeeze) - no apparmor!!!

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When i work in Firefox or Transmission and loading occurs on high speed
(> ~100 KBps) my system completely freeze.
Following keyboard reductions don't work:
Alt+f2, ctrl+alt+f *, ctrl+alt+del, ctrl+alt+backspace, power, and,
even, alt+sysRq+REISUB.
Works only hard reset.
Symptoms: the screen fades during a certain moment. Keyboard indicators
also fade.
Freeze occurs absolutely randomly. At work in the Internet can pass 1
hour, and can pass only 5 seconds.
At kernel parameter acpi=off freeze don't occur. Last insertion BIOS is
installed.
The reference to my case in Russian:

http://forum.ubuntu.ru/index.php?topic=109423.0

The reference to a similar case (to me hasn't helped):

https://bbs.archlinux.org/viewtopic.php?pid=802418

In system logs at the moment of freeze anything isn't present - the
information is erased. For example, the system freeze at 0-00, lately in
logs is 23-58.


saint at saint-laptop:~$ uname -a
Linux saint-laptop 2.6.36-020636rc5-generic #201009211328 SMP Tue Sep 21
14:39:02 UTC 2010 i686 GNU/Linux

saint at saint-laptop:~$ sudo lspci
[sudo] password for saint:
00:00.0 Host bridge: nVidia Corporation MCP79 Host Bridge (rev b1)
00:00.1 RAM memory: nVidia Corporation MCP79 Memory Controller (rev b1)
00:03.0 ISA bridge: nVidia Corporation MCP79 LPC Bridge (rev b2)
00:03.1 RAM memory: nVidia Corporation MCP79 Memory Controller (rev b1)
00:03.2 SMBus: nVidia Corporation MCP79 SMBus (rev b1)
00:03.3 RAM memory: nVidia Corporation MCP79 Memory Controller (rev b1)
00:03.5 Co-processor: nVidia Corporation MCP79 Co-processor (rev b1)
00:04.0 USB Controller: nVidia Corporation MCP79 OHCI USB 1.1 Controller
(rev b1)
00:04.1 USB Controller: nVidia Corporation MCP79 EHCI USB 2.0 Controller
(rev b1)
00:08.0 Audio device: nVidia Corporation MCP79 High Definition Audio
(rev b1)
00:09.0 PCI bridge: nVidia Corporation MCP79 PCI Bridge (rev b1)
00:0b.0 SATA controller: nVidia Corporation MCP79 AHCI Controller (rev b1)
00:0c.0 PCI bridge: nVidia Corporation MCP79 PCI Express Bridge (rev b1)
00:15.0 PCI bridge: nVidia Corporation MCP79 PCI Express Bridge (rev b1)
00:16.0 PCI bridge: nVidia Corporation MCP79 PCI Express Bridge (rev b1)
00:17.0 PCI bridge: nVidia Corporation MCP79 PCI Express Bridge (rev b1)
00:18.0 PCI bridge: nVidia Corporation MCP79 PCI Express Bridge (rev b1)
02:00.0 VGA compatible controller: nVidia Corporation Device 0a2d (rev a2)
02:00.1 Audio device: nVidia Corporation High Definition Audio
Controller (rev a1)
03:00.0 Ethernet controller: Atheros Communications Atheros
AR8121/AR8113/AR8114 PCI-E Ethernet Controller (rev b0)
04:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless
Network Adapter (PCI-Express) (rev 01)

 affects ubuntu
 status new


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** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

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total freeze when downloading (ubuntu 9.10,10.04,10.10, debian squeeze) - no apparmor!!!
https://bugs.launchpad.net/bugs/650423
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