complete system freeze - 2 glsgears test simultaneously.

Bug #172511 reported by kopolov on 2007-11-28
Affects Status Importance Assigned to Milestone

Bug Description

I finally was able to recreate the problem.
My laptop is running Gutsy (though this problem also occurred with Fiesty).
Every time the system was idle for several hours, with nothing but screen saver running, the system froze completely.
No kbd/mouse/touchpad/ssh login from remote ... not even ping to the machine.
I though it might be a heating problem, but it turned out not to.
I checked it with a 3D game "TuxKart". I brought the system to 50 deg but still working.

Then I tried to run 2 GLXGears simultaneously.
I almost instantly caused the system to freeze (few seconds). Temperature at freezing point was 46 deg.
I did that check several times. It still is the case.

I saw a bug here related to large memory usage which causes the system to freeze, but I was not sure if this is the case.

Anyway, I can recreate the problem again.

some details about my machine:

LG laptop. Model F1.
cpu: Intel Core Duo T2350, 1.86 GHz

00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub (rev 03)
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03)
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 02)
00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 02)
00:1c.1 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 2 (rev 02)
00:1c.2 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 3 (rev 02)
00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #1 (rev 02)
00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #2 (rev 02)
00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #3 (rev 02)
00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #4 (rev 02)
00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e2)
00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 02)
00:1f.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7 Family) SATA IDE Controller (rev 02)
00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 02)
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 01)
04:04.0 CardBus bridge: O2 Micro, Inc. OZ711MP1/MS1 MemoryCardBus Controller (rev 21)
04:04.2 Generic system peripheral [0805]: O2 Micro, Inc. Integrated MMC/SD Controller (rev 01)
04:04.3 Bridge: O2 Micro, Inc. Integrated MS/xD Controller (rev 01)
04:04.4 FireWire (IEEE 1394): O2 Micro, Inc. Firewire (IEEE 1394) (rev 02)

I am not sure which extra data is needed (not sure how to report a bug), so please inform me and I will supply it.

kopolov (kopolov) wrote :

My apology.
I cannot recreate the bug.
The checked it for 3 consecutive times (each time running 2 GLXgears at the same time and each time I had to forcefully restart the system due to complete freezing).
But now I checked it again and I was able to run 6 GLXgears without any problem.

But the system still freezes after long period of idle (screensaver).

Oh well ... back to the drawing board.

Albert Damen (albrt) wrote :

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please answer these questions:
- can you please check if your system also freezes when the screensaver is completely switched off (In Screensaver Preferences, switch off Activate screensaver when computer is idle)?
- can you please check if your system also freezes when you select a blank screen as the screensaver theme?

kopolov (kopolov) wrote :

For the first question - I will check it.
For the second question - The answer is yes.
When the screen saver is set to blank screen, the system also freezes.

Currently, I am doing a test to check for display driver defect.
The previous driver was the intel experimental driver (comes with Gutsy).
Now I am checking it with vesa driver.
My test is very simple:
I switched to vesa driver and I will let the computer run solo (no human interference) for 3 days (the entire weekend).
If it won`t freezes, then I will have to start searching for a more stable driver.
If it freezes ... I will be very sad.

thank you for your help.

Bas Roset (broset) wrote :

This sounds very familiar: my laptop (MSI S260 = intel 915GM chipset) also freezes when going into screensaver mode. I have the same driver (intel experimental).
Now with screensaver off and tunrining off the fearture of switching monitor off after idling (thus my monitor being permanently turned on), the freezes are gone.

How about your weekend kopolov? Did it freeze up?

Bas Roset (broset) wrote :

Ok, I just did a little check, my laptop doesn't freeze when going into screensaver mode, but only when it goes into power saving mode (put display to sleep when inactive for ... minutes).
Would I be better of opening a new bugreport? I'm not sure if our bugs are related. And I'm not really certain how to debug this. (me = n00b, I need some guidance here)

kopolov (kopolov) wrote :

During the weekend I did one more test (sad to say it ...)
I reinstaled the Win Vista that came with the laptop.
The test was made to make sure there is no hardware malefunction whatsoever.
And as it turned out ... the hardware is fine. Working properly with Win Vista.
So ... once I`ll reinstll Gutsy, I`ll go back to my testing again.

Bas Roset (broset) wrote :

What's that, Win Vista? Where can I download that distribution? LOL

kopolov (kopolov) wrote :

Well ... now that I know my hardware is working properly, its time to go back to Gutsy.
I spoke with my brother and he said that maybe this crash happens because I also have trouble with my wirreless driver on the laptop.
He suggested to try a work around for the wireless and see if this work.
The work around is to use ndis-wrapper tool to install the window driver for the wireless.
I hope this works and the crashes will end.

Albert Damen (albrt) wrote :

We are closing this bug report because it lacks the information we need to investigate the problem, as described in the previous comments. Please reopen it if you can give us the missing information, and don't hesitate to submit bug reports in the future. To reopen the bug report you can click on the current status, under the Status column, and change the Status back to "New". Thanks again!

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