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


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#21
Vampirexx

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Can we solve the freeze problem on osx 10.8.2 replacing all extensions geforce and nvidia kext with the working 10.8 ones?
Will this trick work?

#22
8ender

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I updated to 10.8.2 and now i'm not getting them during regular use but I can't play a game without getting one every 5 minutes or so. Checked the temp of the GPU and its normal, clock speeds, etc are all normal as well.

#23
Sanky18

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I found something interesting. I ran the openGL extensions viewer app and ran the tests in it and instantly got a freeze. Everytime i ran the tests i got a hard freeze with console filled with channel exceptions and timeouts. Maybe you guys can try the same thing out and post the results.
Btw i have a laptop, Lenovo G460 having the nvidia geforce 310m 512 mb.

#24
8ender

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I tried the test on a new GTX650 and was able to get through. Haven't tried the GTS250 yet.


Interesting thing though: I bought this GTX650 hoping to get a nice upgrade and solve these exceptions and while I'm not getting them nearly as often I am still getting about one exception and lock up a day. Same error messages most of the time:


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


I've tried with and without AGPM and nVidia official drivers and not without success. Doesn't seem to be any rhyme or reason for the exceptions.

#25
mitch_de

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Yep, for me OpenGLExensionsviewer Benches can run forever without Channel exception. But RAGE , Unique Heaven freeze by channel exceptions.
I think reason is very hard to figure out and may also depend from gpu BIOS , Mainboard beside gpu type. Normally non FERMI gpus should not get any channel exceptions - at least in the past i never got them with up to10.7.5. Removing APGM didn't helped.

#26
8ender

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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.

#27
8ender

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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.

#28
8ender

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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.



#29
hugeschnauzer

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MIne always crashing. 10.8.2. gtx285
please help!!

Maybe its a good idea to do an upgrade in that GTX 285 to an ATI
Whats the most powerful ATI's today/easy to install/no crash??

tks

#30
jeffmikels

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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....rt=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.

#31
mitch_de

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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.

#32
Dr. Hurt

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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

#33
hugeschnauzer

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Im running 10.8.3 D78

not disappeared yet

GTX 285

#34
aphex6b

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

NVDA(OpenGL): Channel exception! exception

[left]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.



#35
hugeschnauzer

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10.8.3 did not solved the problem for me..

Maybe some tweak in dsdt... I hope to find a solution for that

#36
wishnu

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Seems like last 10.8.3 beta solved problem for me.
35 hours uptime with no freezes and no exceptions in system log

#37
robin_hood

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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

#38
hugeschnauzer

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Same for me...
Maybe the solution is inside the DSDT.. I need to extract it from Linux first, as Gringo vermelho told me..
No time right now.. but is crashing a lot

#39
RBOwens

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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...

#40
hugeschnauzer

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For me 10.8.3 is better.. less freezes..
And sometimes, if i wait some time the freeze stops and i can continue working

Hope to find a solution for this someday...





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