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Old 07-02-08, 12:20 AM   #1
OVERKILL8
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Default Poor X Performance with Compiz-Fusion on Gentoo

So, I have had an ongoing issue with X in regards to insane CPU usage, and the odd hard-lock (VERY infrequent for the latter) after a seemingly random length of usage.

The symptoms: X consumes 99% of my CPU, making the desktop behave in a basically unusable manner. I cannot kill X and restart it. I must actually restart the system (which can be done; the system is still usable, just insanely slow 90% of the time, 10% of the time it was hard-locked), which is a huge pain in the butt.

This is a known issue from what I understand. Fingers have been pointed at both Compiz AND NVidia, so not knowing which I was experiencing, I have done some work in regards to both.

I added the desktop-effects overlay, which gave me Compiz-Fusion 7.6, and whilst this made my Compiz faster, it did not fix the problem.

SO, then some changes were made to my xorg.conf file.

And here is where the performance issue seems to have come into play.

One of the suggestions was to turn Renderaccel off.

I seem to have sustained a pretty notable performance hit from this.

And I still had the issue with X.

SO, after an actual hard-lock today, I took the suggestion of booting with pci=nommconf, which I have done this boot and I am going to see where this goes.

I installed XP to play a few games on this box (always been a Linux box) and there are ZERO issues with it in Windows.

So, here's the relevant section of my xorg.conf file:
Quote:
Section "Device"
Identifier "NVIDIA GeForce"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce 8800GTS 512"
#Option "UseEdidFreqs" "true"
#Option "UseEdidDpi" "DFP-0"
#Option "TripleBuffer" "true"
# Option "NvAGP" "3"
Option "RenderAccel" "false"
Option "HWCursor" "true"
#Option "XAANoOffscreenPixmaps" "true"
#Option "DRI" "true"
Option "BackingStore" "true"
Option "UseCompositeWrapper" "true"
Screen 0
EndSection

Section "Device"
Identifier "Videocard0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce 8800GTS 512"
EndSection

Section "Screen"
#Option "backingstore"
Identifier "Screen0"
#Device "Videocard0"
Device "NVIDIA GeForce"
Monitor "Monitor0"
DefaultDepth 24
Option "TwinView" "0"
#Option "AddARGBGLXVisuals" "true"
Option "metamodes" "DFP: 1680x1050_60 +0+0"
SubSection "Display"
Depth 24
Modes "1680x1050" "1600x1200" "1280x1024" "1024x768" "800x600" "640x480"
EndSubSection
EndSection
If anybody has any suggestions, I'm open to them

-Chris
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Video: ASUS GeForce 8800GTS 512MB, 16,541 3DMark '06
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Linux: Gentoo 2.6.29 x86_64
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Old 07-02-08, 01:18 AM   #2
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Default Re: Poor X Performance with Compiz-Fusion on Gentoo

Definitely RenderAccel that caused the issue. I re-enabled it, and it's super-fast again.

Problem is, I DO question as to whether it contributes to the instability............

We'll see if that kernel argument is enough I guess..........

-Chris
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Old 07-02-08, 11:56 AM   #3
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Default Re: Poor X Performance with Compiz-Fusion on Gentoo

Well, when I woke up this morning, X was slow and sucking back the CPU. Rebooted, and it's fine again..... for how long, who knows!!!
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Old 07-02-08, 12:39 PM   #4
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Default Re: Poor X Performance with Compiz-Fusion on Gentoo

Does the problem go away if you kill and restart compiz? How about other applications like Firefox? It sounds like you're running out of memory, which is understandable since compiz is a huge memory hog.
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Old 07-02-08, 01:07 PM   #5
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Default Re: Poor X Performance with Compiz-Fusion on Gentoo

Quote:
Originally Posted by AaronP View Post
Does the problem go away if you kill and restart compiz? How about other applications like Firefox? It sounds like you're running out of memory, which is understandable since compiz is a huge memory hog.
I'm definitely not running out of system memory (monitored with GKrellm) but I imagine it's POSSIBLE that it runs out of graphics memory, but on a 512MB card, that's surprising. The issue used to occur on my 256MB 6600, but no where near as frequently, like once every week or two MAYBE, though it had gone over a month at one point.

When I had that card, I was running a different board (P5LD2) and difference CPU (P4 3.2Ghz), so it seems that the upgrade in hardware has accelerated the increase of the occurrence.

I have not tried restarting Compiz, but it is the actual X process that sits at 99%. I will try doing that though, for the hell of it, the next time it occurs.
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Board: Maximus Formula, Rampage conversion, BIOS 308
CPU: Q6600 G0 @ 3.47Ghz (385x9), CM Hyper 212 Cooler
RAM: 4x 2GB Kingston 667 @ 925Mhz, 2V
Video: ASUS GeForce 8800GTS 512MB, 16,541 3DMark '06
Case: Lian Li PC75
PSU: Thermaltake Toughpower 680W
Linux: Gentoo 2.6.29 x86_64
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Old 07-03-08, 03:52 AM   #6
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Default Re: Poor X Performance with Compiz-Fusion on Gentoo

Quote:
Originally Posted by AaronP View Post
Does the problem go away if you kill and restart compiz? How about other applications like Firefox? It sounds like you're running out of memory, which is understandable since compiz is a huge memory hog.
It used to be a huge memory hog at times the Nvidia driver had an insanely large memory leak
Since the time that was fixed, it isn't any longer (it uses ~70MB here, which shouldn't make a somewhat modern desktop machine go OOM).

EDIT: Obviously, the memory usage depends on the amount of windows open and can be both way lower and higher than my 70MB. Making a 2GB machine go OOM would mean there's a ridiculous amount of large windows open, though.
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Old 07-03-08, 01:33 PM   #7
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Default Re: Poor X Performance with Compiz-Fusion on Gentoo

Trying to restart Compiz had X do something wild and just go to my wallpaper with a mouse. Looks like Compiz was successfully killed but was unable to restart. System was still responsive.

Kernel Log from when this was occurring:
Quote:
Jul 3 06:53:34 [kernel] irq 16: nobody cared (try booting with the "irqpoll" option)
Jul 3 06:53:34 [kernel] Pid: 0, comm: swapper Tainted: PF 2.6.24-gentoo-r8 #3
Jul 3 06:53:34 [kernel] [<c0140e46>] [<f9f3cc87>] [<c0141047>] [<c0140588>] [<c01417ce>] [<c01064e4>] [<c01047cf>] [<c0102256>] [<c010225a>] [<c010257d>] [<c04c989c>] [<c04c90e0>] =======================
Jul 3 06:53:34 [kernel] handlers:
Jul 3 06:53:34 [kernel] [<c034dff9>]
Jul 3 06:53:34 [kernel] [<c036babf>]
Jul 3 06:53:34 [kernel] [<f9f3cc20>]
Jul 3 06:53:47 [kernel] NVRM: Xid (0001:00): 16, Head 00000000 Count 0077ec38
Jul 3 06:53:59 [kernel] NVRM: Xid (0001:00): 16, Head 00000000 Count 0077ec3d
Jul 3 06:54:05 [kernel] ata7.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
Jul 3 06:54:05 [kernel] ata7.01: cmd a0/00:00:00:00:00/00:00:00:00:00/b0 tag 0
Jul 3 06:54:05 [kernel] cdb 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Jul 3 06:54:05 [kernel] res 40/00:02:00:08:00/00:00:00:00:00/b0 Emask 0x4 (timeout)
Jul 3 06:54:06 [kernel] ata7.01: status: { DRDY }
Jul 3 06:54:06 [kernel] ata7: soft resetting link
Jul 3 06:54:06 [kernel] ata7.00: configured for UDMA/66
Jul 3 06:54:06 [kernel] ata7.01: configured for UDMA/33
Jul 3 06:54:06 [kernel] ata7: EH complete
Jul 3 06:54:12 [kernel] NVRM: Xid (0001:00): 16, Head 00000000 Count 0077ec44
Jul 3 06:54:24 [kernel] NVRM: Xid (0001:00): 16, Head 00000000 Count 0077ec49
Jul 3 06:54:36 [kernel] ata7.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
Jul 3 06:54:36 [kernel] ata7.00: cmd a0/00:00:00:00:00/00:00:00:00:00/a0 tag 0
Jul 3 06:54:36 [kernel] cdb 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Jul 3 06:54:36 [kernel] res 40/00:02:00:08:00/00:00:00:00:00/b0 Emask 0x4 (timeout)
Jul 3 06:54:36 [kernel] ata7.00: status: { DRDY }
Jul 3 06:54:36 [kernel] ata7: soft resetting link
Jul 3 06:54:37 [kernel] ata7.00: configured for UDMA/66
Jul 3 06:54:37 [kernel] NVRM: Xid (0001:00): 16, Head 00000000 Count 0077ec50
Jul 3 06:54:37 [kernel] ata7.01: configured for UDMA/33
Jul 3 06:54:37 [kernel] ata7: EH complete
Jul 3 06:54:49 [kernel] NVRM: Xid (0001:00): 16, Head 00000000 Count 0077ec55
Jul 3 06:55:02 [kernel] NVRM: Xid (0001:00): 16, Head 00000000 Count 0077ec5c
Jul 3 06:55:07 [kernel] ata7.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
Jul 3 06:55:07 [kernel] ata7.00: cmd a0/00:00:00:00:00/00:00:00:00:00/a0 tag 0
Jul 3 06:55:07 [kernel] cdb 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Jul 3 06:55:07 [kernel] res 40/00:02:00:08:00/00:00:00:00:00/b0 Emask 0x4 (timeout)
Jul 3 06:55:07 [kernel] ata7.00: status: { DRDY }
Jul 3 06:55:07 [kernel] ata7: soft resetting link
Jul 3 06:55:08 [kernel] ata7.00: configured for UDMA/66
Jul 3 06:55:08 [kernel] ata7.01: configured for UDMA/33
Jul 3 06:55:08 [kernel] ata7: EH complete
Jul 3 06:55:14 [kernel] NVRM: Xid (0001:00): 16, Head 00000000 Count 0077ec61
Jul 3 06:55:38 [kernel] ata7.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
Jul 3 06:55:38 [kernel] ata7.00: cmd a0/00:00:00:00:00/00:00:00:00:00/a0 tag 0
Jul 3 06:55:38 [kernel] cdb 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Jul 3 06:55:38 [kernel] res 40/00:02:00:08:00/00:00:00:00:00/b0 Emask 0x4 (timeout)
Jul 3 06:55:38 [kernel] ata7.00: status: { DRDY }
Jul 3 06:55:38 [kernel] ata7: soft resetting link
Jul 3 06:55:39 [kernel] ata7.00: configured for UDMA/66
Jul 3 06:55:39 [kernel] ata7.01: configured for UDMA/33
Jul 3 06:55:39 [kernel] ata7: EH complete
Jul 3 06:56:09 [kernel] ata7.00: limiting speed to UDMA/44:PIO4
Jul 3 06:56:09 [kernel] ata7.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
Jul 3 06:56:09 [kernel] ata7.00: cmd a0/00:00:00:00:00/00:00:00:00:00/a0 tag 0
Jul 3 06:56:09 [kernel] cdb 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Jul 3 06:56:09 [kernel] res 40/00:02:00:08:00/00:00:00:00:00/b0 Emask 0x4 (timeout)
Jul 3 06:56:09 [kernel] ata7.00: status: { DRDY }
Jul 3 06:56:09 [kernel] ata7: soft resetting link
Jul 3 06:56:09 [kernel] ata7.00: configured for UDMA/44
Jul 3 06:56:10 [kernel] ata7.01: configured for UDMA/33
Jul 3 06:56:10 [kernel] ata7: EH complete
Jul 3 06:56:40 [kernel] ata7.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
Jul 3 06:56:40 [kernel] ata7.01: cmd a0/00:00:00:00:00/00:00:00:00:00/b0 tag 0
Jul 3 06:56:40 [kernel] cdb 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Jul 3 06:56:40 [kernel] res 40/00:02:00:08:00/00:00:00:00:00/b0 Emask 0x4 (timeout)
Jul 3 06:56:40 [kernel] ata7.01: status: { DRDY }
Jul 3 06:56:40 [kernel] ata7: soft resetting link
Jul 3 06:56:40 [kernel] ata7.00: configured for UDMA/44
Jul 3 06:56:40 [kernel] ata7.01: configured for UDMA/33
Jul 3 06:56:40 [kernel] ata7: EH complete
Jul 3 06:57:10 [kernel] ata7.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
Jul 3 06:57:10 [kernel] ata7.00: cmd a0/00:00:00:00:00/00:00:00:00:00/a0 tag 0
Jul 3 06:57:10 [kernel] cdb 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Jul 3 06:57:10 [kernel] res 40/00:02:00:08:00/00:00:00:00:00/b0 Emask 0x4 (timeout)
Jul 3 06:57:10 [kernel] ata7.00: status: { DRDY }
Jul 3 06:57:10 [kernel] ata7: soft resetting link
Jul 3 06:57:11 [kernel] ata7.00: configured for UDMA/44
Jul 3 06:57:11 [kernel] ata7.01: configured for UDMA/33
Jul 3 06:57:11 [kernel] ata7: EH complete
Jul 3 06:57:41 [kernel] ata7.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
Jul 3 06:57:41 [kernel] ata7.00: cmd a0/00:00:00:00:00/00:00:00:00:00/a0 tag 0
Jul 3 06:57:41 [kernel] cdb 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Jul 3 06:57:41 [kernel] res 40/00:02:00:08:00/00:00:00:00:00/b0 Emask 0x4 (timeout)
Jul 3 06:57:41 [kernel] ata7.00: status: { DRDY }
Jul 3 06:57:41 [kernel] ata7: soft resetting link
Jul 3 06:57:42 [kernel] ata7.00: configured for UDMA/44
Jul 3 06:57:42 [kernel] ata7.01: configured for UDMA/33
Jul 3 06:57:42 [kernel] ata7: EH complete
Jul 3 06:58:12 [kernel] ata7.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
Jul 3 06:58:12 [kernel] ata7.00: cmd a0/00:00:00:00:00/00:00:00:00:00/a0 tag 0
Jul 3 06:58:12 [kernel] cdb 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Jul 3 06:58:12 [kernel] res 40/00:02:00:08:00/00:00:00:00:00/b0 Emask 0x4 (timeout)
Jul 3 06:58:12 [kernel] ata7.00: status: { DRDY }
Jul 3 06:58:12 [kernel] ata7: soft resetting link
Jul 3 06:58:13 [kernel] ata7.00: configured for UDMA/44
Jul 3 06:58:13 [kernel] ata7.01: configured for UDMA/33
Jul 3 06:58:13 [kernel] ata7: EH complete
Jul 3 06:58:43 [kernel] ata7.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
Jul 3 06:58:43 [kernel] ata7.01: cmd a0/00:00:00:00:00/00:00:00:00:00/b0 tag 0
Jul 3 06:58:43 [kernel] cdb 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Jul 3 06:58:43 [kernel] res 40/00:02:00:08:00/00:00:00:00:00/b0 Emask 0x4 (timeout)
Jul 3 06:58:43 [kernel] ata7.01: status: { DRDY }
Jul 3 06:58:43 [kernel] ata7: soft resetting link
Jul 3 06:58:43 [kernel] ata7.00: configured for UDMA/44
Jul 3 06:58:44 [kernel] ata7.01: configured for UDMA/33
Jul 3 06:58:44 [kernel] ata7: EH complete
Jul 3 06:59:14 [kernel] ata7.00: limiting speed to UDMA/33:PIO4
Jul 3 06:59:14 [kernel] ata7.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
Jul 3 06:59:14 [kernel] ata7.00: cmd a0/00:00:00:00:00/00:00:00:00:00/a0 tag 0
Jul 3 06:59:14 [kernel] cdb 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Jul 3 06:59:14 [kernel] res 40/00:02:00:08:00/00:00:00:00:00/b0 Emask 0x4 (timeout)

****************CUT FOR EXCESSIVE LENGTH*******************
Jul 3 12:18:30 [kernel] ata7.00: status: { DRDY }
Jul 3 12:18:30 [kernel] ata7: soft resetting link
Jul 3 12:18:30 [kernel] ata7.00: configured for PIO0
Jul 3 12:18:31 [kernel] ata7.01: configured for UDMA/25
Jul 3 12:18:31 [kernel] ata7: EH complete
Jul 3 12:18:31 [kernel] sr 6:0:0:0: ioctl_internal_command return code = 8000002
Jul 3 12:18:31 [kernel] : Sense Key : 0xb [current] [descriptor]
Jul 3 12:18:31 [kernel] : ASC=0x0 ASCQ=0x0
Jul 3 12:18:41 [kernel] ata7.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
Jul 3 12:18:41 [kernel] ata7.01: cmd a0/00:00:00:00:00/00:00:00:00:00/b0 tag 0
Jul 3 12:18:41 [kernel] cdb 1e 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Jul 3 12:18:41 [kernel] res 40/00:02:00:08:00/00:00:00:00:00/b0 Emask 0x4 (timeout)
Xorg.0.log showed NOTHING new since I booted yesterday. I had VERY minimal windows open, Xchat, Pidgin, Firefox and Evolution. X must have started acting up sometime through the night, since when I checked on the system at noon today, it was doing the "slow" thing.
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Board: Maximus Formula, Rampage conversion, BIOS 308
CPU: Q6600 G0 @ 3.47Ghz (385x9), CM Hyper 212 Cooler
RAM: 4x 2GB Kingston 667 @ 925Mhz, 2V
Video: ASUS GeForce 8800GTS 512MB, 16,541 3DMark '06
Case: Lian Li PC75
PSU: Thermaltake Toughpower 680W
Linux: Gentoo 2.6.29 x86_64
Windows: Windows XP Pro x64 for the odd game.
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Old 07-03-08, 01:40 PM   #8
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Default Re: Poor X Performance with Compiz-Fusion on Gentoo

Just to add, I have disabled my JMicron PATA controller for now (the device giving the ATA errors) to see if I can get a "cleaner" log, or perhaps, it's related to what's occuring

We'll find out I guess!

-Chris
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CPU: Q6600 G0 @ 3.47Ghz (385x9), CM Hyper 212 Cooler
RAM: 4x 2GB Kingston 667 @ 925Mhz, 2V
Video: ASUS GeForce 8800GTS 512MB, 16,541 3DMark '06
Case: Lian Li PC75
PSU: Thermaltake Toughpower 680W
Linux: Gentoo 2.6.29 x86_64
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Old 07-03-08, 03:15 PM   #9
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Default Re: Poor X Performance with Compiz-Fusion on Gentoo

Jul 3 06:54:05 [kernel] ata7.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
Jul 3 06:54:05 [kernel] ata7.01: cmd a0/00:00:00:00:00/00:00:00:00:00/b0 tag 0
Jul 3 06:54:05 [kernel] cdb 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Jul 3 06:54:05 [kernel] res 40/00:02:00:08:00/00:00:00:00:00/b0 Emask 0x4 (timeout)
Jul 3 06:54:06 [kernel] ata7.01: status: { DRDY }

this is your HD going nuts, I know as the same exact thing was happening to me. The DRDY is the dead giveaway. The system would completely freeze for no reason and sometimes it would make things go nuts (assuming ti froze at a bad time).

For me the fix was to change sata ports on the motherboard. Check your hard drives smart status with smartctl, see if it's dying. I also disabled RAID, ymmv.
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Old 07-03-08, 03:40 PM   #10
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Default Re: Poor X Performance with Compiz-Fusion on Gentoo

It's not an HDD, my two DVD-RW drives are attached to ATA7, which is my JMicron controller. The HDD's are all on my ICH controller.

As per post #8 I have disabled the JMicron controller to see what happens.
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Board: Maximus Formula, Rampage conversion, BIOS 308
CPU: Q6600 G0 @ 3.47Ghz (385x9), CM Hyper 212 Cooler
RAM: 4x 2GB Kingston 667 @ 925Mhz, 2V
Video: ASUS GeForce 8800GTS 512MB, 16,541 3DMark '06
Case: Lian Li PC75
PSU: Thermaltake Toughpower 680W
Linux: Gentoo 2.6.29 x86_64
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Old 07-04-08, 01:31 PM   #11
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Default Re: Poor X Performance with Compiz-Fusion on Gentoo

Well, no hangs yet and no funky messages in my kernel log......... This looks promising!

Just perusing the logs, but it would appear as though the JMicron controller and my video card were sharing an IRQ, that obviously was not going over well from the looks of things......
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Board: Maximus Formula, Rampage conversion, BIOS 308
CPU: Q6600 G0 @ 3.47Ghz (385x9), CM Hyper 212 Cooler
RAM: 4x 2GB Kingston 667 @ 925Mhz, 2V
Video: ASUS GeForce 8800GTS 512MB, 16,541 3DMark '06
Case: Lian Li PC75
PSU: Thermaltake Toughpower 680W
Linux: Gentoo 2.6.29 x86_64
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Old 07-04-08, 06:24 PM   #12
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Default Re: Poor X Performance with Compiz-Fusion on Gentoo

Quote:
Originally Posted by OVERKILL8 View Post
Well, no hangs yet and no funky messages in my kernel log......... This looks promising!

Just perusing the logs, but it would appear as though the JMicron controller and my video card were sharing an IRQ, that obviously was not going over well from the looks of things......
Just out of curiousity I checked my Ubuntu system, my Jmicron and Nvidia are also sharing an IRQ but only for the SATA controller which I don't use. The Jmicron IDE is on it's own IRQ, and Nvidia is also sharing with a USB controller. Anyway, I don't have the same issues as you but I wonder if this IRQ sharing is the reason for occasional issues.
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