I used CentOS 5 for years. Suddenly, it takes one second holding a keyboard key until it shows on the screen:
# uname -a Linux nitrogen 2.6.18-371.11.1.el5PAE #1 SMP Wed Jul 23 15:54:19 EDT 2014 i686 i686 i386 GNU/Linux # xset -q Keyboard Control: auto repeat: off key click percent: 50 LED mask: 00000000 auto repeat delay: 660 repeat rate: 25 auto repeating keys: 00ffffffdffffbbf fadfffdfffdfe5ef ffffffffffffffff ffffffffffffffff bell percent: 100 bell pitch: 800 bell duration: 100 Pointer Control: acceleration: 20/10 threshold: 2 Screen Saver: prefer blanking: yes allow exposures: yes timeout: 0 cycle: 600 Colors: default colormap: 0x20 BlackPixel: 0 WhitePixel: 16777215 Font Path: unix/:7100,built-ins Bug Mode: compatibility mode is enabled DPMS (Energy Star): Standby: 0 Suspend: 1800 Off: 1800 DPMS is Enabled Monitor is On Font cache: Server does not have the FontCache Extension File paths: Config file: /etc/X11/xorg.conf Modules path: /usr/lib/xorg/modules Log file: /var/log/Xorg.0.log
I copied the CentOS 5 /etc/X11/xorg.conf to CentOS 7 (on the same computer) and rebooted - no effect. I copied the CentOS 7 /etc/X11/xorg.conf.d/00-keyboard.conf to CentOS 5 and rebooted - no effect. I tried different CentOS 5 xset settings, I tried an IBM Soft Touch and a Logitech keyboard using different cabeling. What might resolve this new one second delay for each CentOS 5 keyboard key? What might have caused it?
ThanX
I copied the CentOS 5 /etc/X11/xorg.conf to CentOS 7 (on the same computer) and rebooted - no effect. I copied the CentOS 7 /etc/X11/xorg.conf.d/00-keyboard.conf to CentOS 5 and rebooted - no effect. I tried different CentOS 5 xset settings, I tried an IBM Soft Touch and a Logitech keyboard using different cabeling. What might resolve this new one second delay for each CentOS 5 keyboard key? What might have caused it?
Did you change or update any hardware recently? This might be a bit far-fetched, but I observed behaviour like this when connecting a new monitor to a machine running CentOS5 through DVI. I don't recall the details, but the monitor created some kind of interrupt issue that the CentOS5 kernel (5.4 - 2.6.18-164.15.1.el5) couldn't handle. Symptoms were slow-responding keyboard and jerky mouse.
If it's something like this, you should see it in the logs.
On 08/26/14 22:54, Reinhard Dunkel wrote:
I used CentOS 5 for years. Suddenly, it takes one second holding a keyboard key until it shows on the screen:
Dumb question: have you tried a second keyboard?
mark, who tries not to drink over the keyboard
# uname -a Linux nitrogen 2.6.18-371.11.1.el5PAE #1 SMP Wed Jul 23 15:54:19 EDT 2014 i686 i686 i386 GNU/Linux # xset -q Keyboard Control: auto repeat: off key click percent: 50 LED mask: 00000000 auto repeat delay: 660 repeat rate: 25 auto repeating keys: 00ffffffdffffbbf fadfffdfffdfe5ef ffffffffffffffff ffffffffffffffff bell percent: 100 bell pitch: 800 bell duration: 100 Pointer Control: acceleration: 20/10 threshold: 2 Screen Saver: prefer blanking: yes allow exposures: yes timeout: 0 cycle: 600 Colors: default colormap: 0x20 BlackPixel: 0 WhitePixel: 16777215 Font Path: unix/:7100,built-ins Bug Mode: compatibility mode is enabled DPMS (Energy Star): Standby: 0 Suspend: 1800 Off: 1800 DPMS is Enabled Monitor is On Font cache: Server does not have the FontCache Extension File paths: Config file: /etc/X11/xorg.conf Modules path: /usr/lib/xorg/modules Log file: /var/log/Xorg.0.log
I copied the CentOS 5 /etc/X11/xorg.conf to CentOS 7 (on the same computer) and rebooted - no effect. I copied the CentOS 7 /etc/X11/xorg.conf.d/00-keyboard.conf to CentOS 5 and rebooted - no effect. I tried different CentOS 5 xset settings, I tried an IBM Soft Touch and a Logitech keyboard using different cabeling. What might resolve this new one second delay for each CentOS 5 keyboard key? What might have caused it?
ThanX _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
On Tue, Aug 26, 2014 at 10:54 PM, Reinhard Dunkel dunkel@sciencesoft.net wrote:
I used CentOS 5 for years. Suddenly, it takes one second holding a keyboard key until it shows on the screen:
Is this system accessible via SSH? Does the behavior only happen when using the physical keyboard?
Might it be out of physical memory (RAM) and swapping violently? Disk thrashing of this sort can cause rather irritating delays.
Or maybe a failing or failed drive? (Assuming you could have a hardware or software RAID setup).
On 08/27/2014 06:07 PM, SilverTip257 wrote:
On Tue, Aug 26, 2014 at 10:54 PM, Reinhard Dunkel dunkel@sciencesoft.net wrote:
I used CentOS 5 for years. Suddenly, it takes one second holding a keyboard key until it shows on the screen:
Is this system accessible via SSH? Does the behavior only happen when using the physical keyboard?
Might it be out of physical memory (RAM) and swapping violently? Disk thrashing of this sort can cause rather irritating delays.
Or maybe a failing or failed drive? (Assuming you could have a hardware or software RAID setup)
Does CentOS now only support user request tracking by email? I cannot find this thread on the CentOS web site...
My computer has 4 GB Patriot memory - the maximum amount the motherboard allows. Using command "top" shows less than one percent of CPU and memory are in use. The computer is idle. I am using a 1 TB WD disk for CentOS 5 and a 2 TB Seagate disk for CentOS 7. No RAID.
On CentOS 5, I use command "su" to show a root shell. On CentOS 7, su no longer works and I use "ssh root@localhost" instead. (I have not tried SSH to access my CentOS systems remotely yet.)
Concerning a previous comment: I did not modify the hardware likely causing this problem. I only have to switch between both disks - described above - to boot CentOS 5 or CentOS 7. My suspicion is "yum update" using numerous official and unofficial "repos" installed something causing this challenge. The login screen of CentOS 5 for user name and password still works fine. By the way, we develop software (NMRanalyst) and I try to keep a CentOS 5 system alive so we can test on it to claim our software is supported on it. When I don't get further suggestions, I likely re-install another disk with CentOS 5 - this time using only official repos.
ThanX for all suggestions!
This has happened to me in the past. It is not an OS problem, it was for me a hardware issue. One or both of two things may be causing this problem.
Some USB keyboards require more power than others. My USB keyboard would exhibit these same symptoms when plugged into a hub that was powered only by the computer itself or another hub. So my particular USB keyboard must be plugged into a hub that has its own power supply.
Also, I have found that some USB keyboards are especially likely to exhibit these same symptoms when plugged into an unpowered USB 3 port.
Login remotely via SSH never exhibited any of these keyboard symptoms.
Perhaps this is the cause of your problem as well.
On 08/28/2014 04:30 AM, Reinhard Dunkel wrote:
On 08/27/2014 06:07 PM, SilverTip257 wrote:
On Tue, Aug 26, 2014 at 10:54 PM, Reinhard Dunkel dunkel@sciencesoft.net wrote:
I used CentOS 5 for years. Suddenly, it takes one second holding a keyboard key until it shows on the screen:
Is this system accessible via SSH? Does the behavior only happen when using the physical keyboard?
Might it be out of physical memory (RAM) and swapping violently? Disk thrashing of this sort can cause rather irritating delays.
Or maybe a failing or failed drive? (Assuming you could have a hardware or software RAID setup)
Does CentOS now only support user request tracking by email? I cannot find this thread on the CentOS web site...
My computer has 4 GB Patriot memory - the maximum amount the motherboard allows. Using command "top" shows less than one percent of CPU and memory are in use. The computer is idle. I am using a 1 TB WD disk for CentOS 5 and a 2 TB Seagate disk for CentOS 7. No RAID.
On CentOS 5, I use command "su" to show a root shell. On CentOS 7, su no longer works and I use "ssh root@localhost" instead. (I have not tried SSH to access my CentOS systems remotely yet.)
Concerning a previous comment: I did not modify the hardware likely causing this problem. I only have to switch between both disks - described above - to boot CentOS 5 or CentOS 7. My suspicion is "yum update" using numerous official and unofficial "repos" installed something causing this challenge. The login screen of CentOS 5 for user name and password still works fine. By the way, we develop software (NMRanalyst) and I try to keep a CentOS 5 system alive so we can test on it to claim our software is supported on it. When I don't get further suggestions, I likely re-install another disk with CentOS 5 - this time using only official repos.
ThanX for all suggestions! _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
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On Thu, Aug 28, 2014 at 6:32 AM, David Both <dboth@millennium-technology.com
wrote:
This has happened to me in the past. It is not an OS problem, it was for me a hardware issue. One or both of two things may be causing this problem.
Some USB keyboards require more power than others. My USB keyboard would exhibit these same symptoms when plugged into a hub that was powered only by the computer itself or another hub. So my particular USB keyboard must be plugged into a hub that has its own power supply.
Definitely try another keyboard as others have suggested. And another USB port ... maybe even try a PS2 keyboard if the mobo has one and you have one of those keyboards handy.
On the topic of power... It's possible that your power supply is failing. You'll experience sluggishness ... it might take a few minutes to shutdown or reboot where it should only take a few seconds. Or when it gets worse, the machine refuses to turn on.
If you can run a rescue OS on the system and it still acts up, then its most likely a hardware problem.
From there you get to swap "known good" components to track down the
problem. ;-)
On Thu, August 28, 2014 3:30 am, Reinhard Dunkel wrote:
On CentOS 5, I use command "su" to show a root shell. On CentOS 7, su no longer works and I use "ssh root@localhost" instead. (I have not tried SSH to access my CentOS systems remotely yet.)
I believe, [on CentOS 7] the user should be in the wheel group to successfully use su command (when he gives root password to the contrary to sudo command when one gives one's own password)
I hope, this helps.
Valeri
++++++++++++++++++++++++++++++++++++++++ Valeri Galtsev Sr System Administrator Department of Astronomy and Astrophysics Kavli Institute for Cosmological Physics University of Chicago Phone: 773-702-4247 ++++++++++++++++++++++++++++++++++++++++
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David Both -
Lars Hecking -
mark -
Reinhard Dunkel -
SilverTip257 -
Valeri Galtsev