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mitch_de

Nvidia 10.8.2: OpenGL channel exceptions (freezes) -9600GT/285GTX

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Wierd thing is that with the GTS250 the OS seems relatively stable but I can't play any sort of game for more than a minute or two without a crash. The GTX650 can play games just fine for hours but I'll still get an exception and lockup using the OS about once a day. Seems to be completely random.

 

I'm also finding it strange that the larger hackintosh doesn't seem to be having this problem or we'd see more threads on it.

 

Can everyone thats having this issue post their specs? Maybe there is another component we all have in common.

 

 

Mine:

Motherboard: Gigabyte EP45T-UD3LR

CPU: Core2Quad

Video: GTS250 or GTX650

Running: 10.8.2, MacPro 5,1 smbios, and ALC8xxHDA.kext, AppleRTC_Patched_Lion.kext, and JMicronATA.kext in the Extras folder.

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Apple has released a special 10.8.2 update for the new retina macbooks as well as other 2012 macs. They seem to come with some brand new Nvidia drivers and are supposed to have reliability fixes. More information here: http://netkas.org/?p=1227

 

I've had these installed since last night and so far no exceptions with a fair amount of use and some gaming. I'll update in a few days or if I run into any exception but I'm keeping my fingers crossed that this is a solution.

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Just an update to the above. The new drivers didn't fix any problems for me but see below. Posted this in the other exceptions thread:

 

I think I've solved my random Channel Exceptions. I updated the bios on my EP45T-UD3LR from F5 to F10. Not sure why that fixed things but I've been crash free for 3 days now during lots of gaming and regular use. Going to keep on testing to make sure. I was also using a F5 specific DSDT and am now using a F10 bios specific one.

 

I'm not knowledged enough on DSDT hacking to understand the differences between the two DSDTs but I can post them here if someone wants to take a look.

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Just chiming in... I am getting the same error:

 

 

kernel[0]: NVDA(OpenGL): Channel exception! exception type = 0xd = GR: SW Notify Error

 

I'm running the following specs:

 

Main Board: GIGABYTE GA-Z68X-UD3H-B3 (U1h) // this is the UEFI firmware

CPU: i5-2500K // not overclocked

GPU: Zotac GeForce 640 // runs brilliantly under Linux Mint 14 (cinnamon) with up to 500 FPS in Minecraft!

Memory: Corsair Vengeance 8GB // on two 4GB sticks

OS: Mountain Lion 10.8.2

 

The only game I play is Minecraft, and I regularly get channel exception errors during a gaming session, but it is unpredictable as to when the error shows up. I can log in by ssh and kill Minecraft to regain control of the computer.

 

Sometimes I get the error in the OS itself, the screen will get corrupted and I'll lose control of the computer, but that is truly infrequent.

 

I have tried removing the AGPM kext, but that didn't help, so I restored it.

I have tried installing the latest nVidia Quadro 4000 driver, but that hasn't helped, so I'll restore the Apple provided one.

 

One user on the Apple Forums (https://discussions.apple.com/thread/1916253?start=435&tstart=0) has posted that his solution was to completely remove all kexts starting with NV or GeF.

 

That sounds drastic, but I'm willing to try it. For now, I simply reboot into Linux whenever I want to play Minecraft.

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I also have probs with Channel Exception - even on old (non fermi/ non kepler) GT 9600. Coming up with 10.8.1.

Now, with OS X 10.8.3 D68 they are gone. Perhaps next update (i think soon ) to 10.8.3 final will help at least some (non fermi) to avoid channel exception problem.

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This is a known problem with all cards using the NVDANV50Hal. Some cards also go into a low power state spontaneously causing major lags requiring a system reboot.

Apple has acknowledged the issue and has fixed it in 10.8.3

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upgraded my HD5870 with a GTX 660Ti. Since then i started to experiencing the

NVDA(OpenGL): Channel exception! exception

system lockups about once a day (i suspected Safari is involved) Nothing helped to fix it. Now i upgraded to 10.8.3 D74 and i hope it's gone for now. I did lose Trim support (i have 4 SSD's) but i rather have non-working-trim-support then this NVIDIA OpenGL bug. If it's not fixed in 10.8.3 final i will go back to my hd5870 cause in 4 years running Ati cards in OSX86 i never had this {censored} before.

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10.8.3 has't resolved this issue, for me at leasˆ

 

 

Mar 22 09:51:32 robinxps kernel[0]: NVDA(OpenGL): Channel exception! exception type = 0x8 = Fifo: Watchdog Timeout Error

Mar 22 09:51:32 robinxps kernel[0]: IOVendorGLContext::ReportGPURestart

Mar 22 09:51:32 robinxps kernel[0]: 0000006e

Mar 22 09:51:32 robinxps kernel[0]: 00000001 0000902d 00000000 00000000

Mar 22 09:51:32 robinxps kernel[0]: 00000000 00000100 00000000 0000000c

Mar 22 09:51:32 robinxps kernel[0]: 00000000 00000000 00000000

Mar 22 09:51:32 robinxps kernel[0]: 00000000 00000000

Mar 22 09:51:32 robinxps kernel[0]: 0000006e

Mar 22 09:51:32 robinxps kernel[0]: 00000001 0000902d 00000000 00000000

Mar 22 09:51:32 robinxps kernel[0]: 00000000 00000100 00000000 0000000c

Mar 22 09:51:32 robinxps kernel[0]: 00000000 00000000 00000000

Mar 22 09:51:32 robinxps kernel[0]: 00000000 00000000

Mar 22 09:51:32 robinxps kernel[0]: NVDA(OpenGL): Channel exception! exception type = 0xd = GR: SW Notify Error

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Perfectly working Asus P5Q, Geforce GTX460se and OS X 10.8.2. NEVER a problem, upgraded to 10.8.3 and the errors and lockups started.

NVDA(OpenGl): Channel Timeout!.. I tried removing 10.8.3 Nvidia kexts and installing 10.8.2 and big crash. Complete Fresh install of

10.8.3 and same problem. This computer dual boots Windows 8 and NEVER a problem at any time. Clearly a driver issue. Why cant

Apple/Nvidia make a driver that just works with all Nvidia cards. Hate to say it but Windows users have that exact thing, a single

driver from NVIDIA that just plain works without crashes. Oh well, hopefully one of the more gifted Hackintosh people can figure

this out...

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After a long time.. its solved!!!

Added LegacyAGPM.kext with changed High/Low thresholds

 

the file: http://cl.ly/0g3s2K2h3y3B

 

as seen on: http://legacy.tonymacx86.com/viewtopic.php?f=15&t=20367&start=0&hilit=Channel+exception

 

Open console and check typing AGPM.

 

It must appear the current state GPU are using

 

Until now, im very happy... even FCPX do not crash anymore

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Nvidia 9600 GT from 10.9.0 to 10.9.2 beta (13C32)

 

Serious problems still :(

 

2013-12-25 01:55:28,000 kernel[0]: IOVendorGLContext::ReportGPURestart 
2013-12-25 01:55:28,000 kernel[0]: NVDA(OpenGL): Channel exception! exception type = 0xd = Graphics Engine Error (GR Error 5)
2013-12-25 01:55:48,000 kernel[0]: NVDA(OpenGL): Channel timeout!
 
UI Freezing & Crashing.
with h264 web videos and desktop apps.
 
 
Affecting real Macbook Pros too with Nvidia 9400m or Nvidia 9600m GT graphics.
This things started happening at 10.8 Mountain Lion. It is a shame that after more than one year it's still not fixed.

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I have bought instead a Gainward GT630 1Gb card. Kepler GK208 chip. Slow memory. 14 Gb/sec only compared to the 56 Gb/sec of the 9600 GT, but the GPU itself has 3 times as much power. 691 GFlops compared to 208.

All problems gone. No crashes anymore.

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