Ubuntu :: System Unstable In Z68 Core I7 2600k Environment?
May 20, 2011
I recently assembled a new desktop computer, the following is the hardware details
CPU: intel core i7 2600
Motherboard chipset: intel Z68, GIGABYTE GA-Z68A-D3H-B3
Video card: Geforce GTX 560 Ti
I tried to install ubuntu 11.04 i386 and X86-64 version. Both of them are quite unstable.The system is easy to crash because of network problem and the internet connection is extremely slow. I also install window 7 in the same computer while the wired network is doing well.
We have a small cluster of 20 HP systems, all running CentOS 5.3 in an NFS-root environment. Half are quad-socket, quad-core Xeon E7340 @ 2.40GHz (total 16 cores), the other half are 8-socket, quad-core Opteron 8354 (total 32 cores). All systems have a Mellanox Infiniband adapter ("Mellanox Technologies MT25418 [ConnectX VPI PCIe 2.0 2.5GT/s - IB DDR / 10GigE] (rev a0)")
With kernel 2.6.18-128.1.6.el5, infiniband works fine on all systems.
With the update to kernel 2.6.18-164.11.1.el5 (and both types of node running the same NFS-root image), the 16-core Xeons still work fine. Infiniband no longer works on the 32-core Opterons. Specifically, either the ib0 interface fails to appear, or it does appear but when configured with an IP address, doesn't actually work. In either case, loading the IB kernel modules takes a long time, but I haven't instrumented the load script yet to see which module, if any, is at fault. More errors listed below.
However, if I tweak the BIOS of the 32-core systems to reduce the per-socket core count to 2 (so effectively 8-socket, dual-core, down to a total of 16 available cores), Infiniband starts working again. Putting it back to 32-cores makes it fail. Booting the older kernel makes it work again. In summary: old kernel, IB works on all systems. Newer kernel, IB only works on 16-core systems.
Updating the IB firmware from 2.5.0 to 2.7.0 (latest available) doesn't help. I also did a full 'yum update' to make sure that libmlx4, openibd all other associated packages were up-to-date. Doesn't help either.
Some errors that appear on 32-core nodes:
ib_query_port failed (-16) for mlx4_0 ib_query_port failed (-16) for mlx4_0 mlx4_core 0000:04:00.0: SW2HW_MPT failed (-16) mlx4_core 0000:04:00.0: SW2HW_MPT failed (-16)
So 2 days ago everything was all fine on my machine. Has been for about a month, but all of a sudden as of yesterday I have no sound, I am seeing IRQ interupts on boot, During boot I am seeing file system is not clean, , and swap space is being used for the first time while doing normal task, etc. These are 2 new hard drives in RAID 1 with ReiserFS. I should have used a newer FS but thats a whole other argument.
Anyways here we go. The system is Debian Lenny amd64 Physical RAM 4GB + 6GB swap /var/log/messages
Code: Feb 21 07:35:09 Sarah kernel: imklog 3.18.6, log source = /proc/kmsg started. Feb 21 07:35:09 Sarah rsyslogd: [origin software="rsyslogd" swVersion="3.18.6" x-pid="3994" x-info="http://www.rsyslog.com"] restart code....
My work machine crashes 1-3 times a day, and I often lose work. This is getting very frustrating--I've never known a Linux system to be so unstable.
When it freezes, I can still move the mouse around. I believe it's also still doing some background tasks, since files have finished copying before and my music will still be playing, if it was before. But the mouse cursor doesn't change, and it's totally nonresponsive.
The trouble is, I don't know how to diagnose this problem, to tell you something less vague. I might be able to check, to see what's going on? The problem usually comes about when I'm doing something--either loading a new web page, or starting a new program, or even when I just hit a button. Otherwise, I'm just stumped.
I recently bought 2 RAM modules, 1GB each, to upgrade my system replacing the 460 MB I had before.Once replaced, I started my system and checked with 'free -m' that the system can see them and uses them.But my system became unstable, and it gets stuck (hangs) after 20-40 minutes and I have to do a hard reboot to get it back to work.
Also flash-player crashes few minutes after playing no matter which browser I use.
I have made an upgrade after installing my new RAM and have the latest Kernel installed.
I have an XP laptop, currently running very low on HDD space and RAM capacity, waiting to be replaced. Very slow indeed. It recently had problems booting up, and now takes about 20 minutes to get fully started. Is it safe/advisable to run the demo version of Ubuntu from the LiveCD? I really can't afford to trash or crash my computer, it's got lots of important data on it etc.
Ive been searching for days and days trying to get this monitor to output in 1366x768 on Ubuntu 10.04. I knew it was possible, i did it late one night about a month back, but my system became unstable (not due to the resolution, i had setup a firewall to block all incoming till i unlock it, then another application to connect before i log in, and somehow it managed to lock out my keyboard on the login screen AND the recovery console, so i decided to just reinstall it)
Anyways, i found out exactly how to do it (for the Acer 183h that is). Ive spent about 48 hours total pouring through documents and found the documentation for nvidia-settings (easy find, i know, i was hoping to find an easy solution like what im typing up)
So, i figured out I could use Nouvaeu to get the proper settings (since all the modeline calcs dont do 1366, only 1360.) What i did was i went into the log file for the xorg,conf right after i installed, and in there somewhere near the middle it says what the timings are.
Code:
And i inputed that modeline into the monitor section, like so:
Code:
One of the two EDID commands is an old one, i just left it in there so when i was searching throught the xorg log i could find the section really quickly.
(BTW, im not sure if these timings are 100 accurate until i reboot my livecd and check, but im sure thier pretty damn close, and my monitor hasent exploded yet if your worried bout it, grab your livecd, open your xorg.conf, and it "should" be in the monitor section)
Next, i had to input all the Options to not search for different modes into the device section:
Code:
And finally, i had to set the screen to output the 1366x768, entering Modes "1366x768_60_0"
Code:
In the Modeline and Modes section, its VERY important that you have it in the format i have it in. The Modeline name MUST be completely custom, by adding either letters or extra _0.
And thats it!
Reboot, restart X, whatever (I prefer reboot, gives me time to ponder ) and you should be good to go.
(I know this may seem like a beginners knowledge type of thing, but im a beginner, pretty damn bright, and it still took me 4 days So, if this helps just one other person, ive done my part)
Im also pretty sure this method will work with other wide screen monitors, as long as you get the timings off Nouveou via LiveCD or installing the driver.
EDIT: This thread has taken a different turn, please go down to viewtopic.php?f=30&t=64242#p370832 Below is I originally wrote, now totally irrelevant.:D I am delighted/bored with my one Debian Squeeze install, so I've decided to free up a partition to play with another configuration of the universal OS.At the moment I am liking the looks of the supposedly not so unstable Sid; what's the ideal download/install path to get Sid up and running? Is it:1) I already have a live Squeeze GNOME DVD lying around; should I install that again and upgrade to Sid?
I am running CPU tests on a radio controller to determine max simultanious calls. A tool using top was developed so that we could get a good look at what exactly was happening on the process level, however we are mainly interested in one object running on the box.The box has a single core Celeron processsor running the Wind River Linux platform. The CPU usage from my object is frequently spiking over 100%. Doing some research online so far has led me to the fact that a multicore processor can do this however I have found no mention of a single core processor displaying this behavior.
i am running gigabyte GA-M68M-S2P and AMD sempron 2.7. the problem is when i try to run dual core. it will boot and run for 2mins then it crashes. single core runs perfect.
I've tried searching the forums / google and haven't been able to come up with anything... in Debian-based distros there's an option that can be set to allow boot concurrency so that multiple processor cores can be used for the boot process. Windows also has an option similar to this to specify how many processor cores to use for boot.
Is there an option for multi-core booting in Fedora?
In the past, I've deployed new 64 bit systems and I've worked on and developed on 64 bit systems. But until a week ago, my workstation was a 32 bit system. Now, it is a 64 bit quad core Phenom II system, and I suppose I need to start the migration to 64 bit Linux. I do not want to blow off my system and rebuild it. This particular system dates back a decade and through many many updates. There is some digital debris in it, but there is also a fair amount of customization that I have implemented either for my own purposes or for customers, and to lose that customization would represent a headache for me.
What I want to do is install a 64 bit system over top of the 32 bit system. It is my hope that doing this would install the necessary 64 bit libraries, while not impacting the existing 32 bit libraries (except with some possible symlink problems). I then, hopefully, could boot into a 64 bit kernel while still running 32 bit programs. Is this feasible? My backup system is comprehensive; I COULD just try it and back up if my system became hosed. But I'd rather not; I have a lot of work to do and I'd rather not learn by doing in this case.
I have a desktop system (P55-USB3 + Core i7 + Ubuntu 10.10) that fails to suspend/resume from memory. So I'm trying to diagnose the problem. The first obstacle was easy enough --- when I put the system to sleep to memory, the computer comes back alive right away. A look at /var/log/kern.log revealed that one USB device (usb10) failed to suspend, and from there I was able to pin it down to the USB3 controller in the BIOS. Disabled that and this problem disappeared.
Now, I'm stuck with the second obstacle. The computer successfully goes into the suspend mode, but it hangs during resume. The monitor doesn't get any video signal, and it fails to respond to ping (netconsole doesn't work either.) After a forced reboot (that involves unplugging the power cable), /var/log/kern.log doesn't contain any interesting entries. All the pm_test modes from freezer to core succeed (I followed [URL] I've also tried pm_trace (https://wiki.ubuntu.com/DebuggingKernelSuspend) but again kern.log nor dmesg contains anything after the suspend. Either the write didn't survive the forced power off, or the resume is failing even before that. The motherboard doesn't have a serial port nor firewire, so getting kernel logs through them is not a possibility, either.
I am trying to install a program on my Linux system (Fedora core 5) but it fails because there is no fort77 compiler. I know that I have working ifort on my system, but I need fort77. It looks like that the program that I am trying to install can also be compiled with g77, but again this one is also missing. how I can get these compliers and get them work on my system.
I have a command line OCR program called OCR Shop XTR (Vividata corp) that I am using on a system with a 6-core AMD chip. I changed the bios so that the 6-cores were activated, but htop shows me that while the program is running, I am only getting activity on one core (the program maxes out the one core with consistent usage between 97% and 100%).
I have read that many programs are not written to take advantage of multiple core cpu's. However, I am just hoping that there is some way to get this program to take advantage of the extra cores. Does anyone know of a way to invoke programs from the command line which would spread the workload out among additional cores?
Here is the output of uname -a:Linux linux 2.6.37.1-1.2-desktop #1 SMP PREEMPT 2011-02-21 10:34:10 +0100 i686 athlon i386 GNU/LinuxAnd here is the output for one of the cores from cat /proc/cpuinfo:processor : 5
vendor_id : AuthenticAMD cpu family : 16 model : 10 model name : AMD Phenom(tm) II X6 1100T Processor stepping : 0
I would like to find a Linux testing environment , my PC is slow , it is not good to install VM and I do not have laptop , besides , I want to do testing at different places , can advise is there online Linux testing environment ? I just want to test the Linux command .
I have now installed Wheezy on two different hard drives and in each case it seems only one CPU of my dual core CPU computer is recognized. System Monitor, Gkrellm and lscpu show just one when prior to the new install the old Wheezy showed both CPU's. I have put the hard drive into two other computers with dual core CPU's and all show just one CPU.
Interestingly System Profiler and Benchmark (hardinfo?) > Devices > Processors now show a large amount of processor infomation when with the old Wheezy I would only see both CPU's listed and nothing else.
I recently read in a forum that by default the Linux kernel only activates one of two cores in a dual core processor. Searching online gave one option to find out and that was the mpstat command. I therefore ran the command and got the following output.As the result says, it shows only 1 cpu. I was wondering what I could do to activate both cores in my machine, and whether doing so was going to cause me any problems.
Assume someone bind a particular process to a particular CPU core(In multi core machine) by using sched_setaffinity() like functions. Then how we can get that process running core id and CPU core utilisation of that process on that running CPU core(Pragmatically or by a Linux command)?.
I just recently reinstalled openSUSE 11.3 last night with the GNOME desktop. Since I'm starting fresh again, I'd like to set up my System as flawless as possible.
So, my question is stated in the Title. How do you set System-Wide environment variables on OpenSUSE 11.3 // GNOME? I usually set them by adding an export to my ~/.bashrc, but I remember in Ubuntu that I could add them to /etc/environment. I checked that file out on my system, and it has a the default comment on it stating:
"This file is parsed by pam_env module...Syntax: simple "KEY=VAL" pairs on seperate lines"
This seems to be the spot to add my "export JAVA_HOME=/usr/java/..etc", etc. but I wanted to clarify before I went ahead and made any changes.
i have a centos 5.4 without desktop environment. i can only access certain system settings via browser (and of course console). i would like to encrypt some folders. but these folders are used by the system. can i encrypt them? will the system still be able to access these folders? if yes, how can i encrypt only through console or is there something web based software for this?
i have added a tomcat startup service using chkconfig. I have set up JAVA_HOME and JRE_HOME as well ass alternatives to point to the correct location.I have an init script in /etc/init.d. When i start the tomcat service using [ /etc/init.d/<x> start ] everything works fine and the environment variables for JAVA_HOME and JRE_HOME are used correctly.Now i added the service <x> using chkconfig --add so that it can start on boot up. But now the service does not use the system environment variable for JAVA and JRE setup by me.Also after complete bootup if i try to start the service using [ service <x> start] the environment variable in the shell are not used. don't want to exclusively declare variables for JAVA_HOME and JRE_HOME in the init script.
I installed a library to the /usr/local/ prefix in Linux using ./configure && make && make install. What environment variables do I need to set in order for the linker and compiler to search these new library and header paths?
