Mailinglist Archive: opensuse (2243 mails)
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[opensuse] Xorg Server Saturates CPU (Kernel Mode) When DPMS Engages
- From: Randall R Schulz <rschulz@xxxxxxxxx>
- Date: Sun, 1 Feb 2009 09:30:24 -0800
- Message-id: <200902010930.24991.rschulz@xxxxxxxxx>
Hi,
In the aftermath of my ill-considered attempt to install the Gnome
Control Center (*), subsequently removed, I find that when I come back
to my system after a long idle period, GKrellM is showing me a solid
block of 100% CPU, most of it kernel-mode. This abnormal usage ceases
with the disengagement of the DPMS / screen saver.
In order to track down the cause of this symptom that vanishes when I
use keyboard or mouse (**), I ran a loop of periodic "ps axl"
invocations directed into a file before retiring in the evening. From
this I deduced that the X server is the culprit. At least it is the
process accumulating the CPU usage, but since it's a server, this may
just reflect it responding to a barrage of requests from some other
process.
Furthermore, it is not the case that this extreme CPU use is caused by
the screen saver itself, because I can wait for it to kick in, let it
run for several minutes (but less than the DPMS initiation interval)
and then cancel it (the screen saver) and see from the 5-minute
interval displayed by GKrellM that CPU usage is normal (for the screen
saver I'm currently using, that's just a few percent).
In fact, the abnormal usage does not start until about 10 minutes after
the system becomes idle. Additionally, there appears to be a short
interval (about 5 minutes) when the CPU usage drops back to normal, and
then it goes up and stays up.
This is openSUSE 11.1.
If anyone can shed some light on this, give me some hints about what
might be wrong, what to look at, what experiments to conduct, etc., I'd
appreciate it.
(*) The other possibility was installing the KDE 4 Personal Settings
packages, which unlike the subsequently removed Gnome Control Center,
remains installed. However, I don't believe the symptom began until I
added and then removed the Gnome packages.
(**) I know I could SSH in from another system to monitor it without
disengaging DPMS or the screen saver. I may yet try that.
Randall Schulz
--
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For additional commands, e-mail: opensuse+help@xxxxxxxxxxxx
In the aftermath of my ill-considered attempt to install the Gnome
Control Center (*), subsequently removed, I find that when I come back
to my system after a long idle period, GKrellM is showing me a solid
block of 100% CPU, most of it kernel-mode. This abnormal usage ceases
with the disengagement of the DPMS / screen saver.
In order to track down the cause of this symptom that vanishes when I
use keyboard or mouse (**), I ran a loop of periodic "ps axl"
invocations directed into a file before retiring in the evening. From
this I deduced that the X server is the culprit. At least it is the
process accumulating the CPU usage, but since it's a server, this may
just reflect it responding to a barrage of requests from some other
process.
Furthermore, it is not the case that this extreme CPU use is caused by
the screen saver itself, because I can wait for it to kick in, let it
run for several minutes (but less than the DPMS initiation interval)
and then cancel it (the screen saver) and see from the 5-minute
interval displayed by GKrellM that CPU usage is normal (for the screen
saver I'm currently using, that's just a few percent).
In fact, the abnormal usage does not start until about 10 minutes after
the system becomes idle. Additionally, there appears to be a short
interval (about 5 minutes) when the CPU usage drops back to normal, and
then it goes up and stays up.
This is openSUSE 11.1.
If anyone can shed some light on this, give me some hints about what
might be wrong, what to look at, what experiments to conduct, etc., I'd
appreciate it.
(*) The other possibility was installing the KDE 4 Personal Settings
packages, which unlike the subsequently removed Gnome Control Center,
remains installed. However, I don't believe the symptom began until I
added and then removed the Gnome packages.
(**) I know I could SSH in from another system to monitor it without
disengaging DPMS or the screen saver. I may yet try that.
Randall Schulz
--
To unsubscribe, e-mail: opensuse+unsubscribe@xxxxxxxxxxxx
For additional commands, e-mail: opensuse+help@xxxxxxxxxxxx
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