Screen freezes for a few seconds
Hello,
a few days ago, I began to notice my mac is getting issues with completely freezing up for a few seconds. The screen is completely stationary, the cursor isn't moving and the clock's seconds do not count forwards. Audio is still continuing to run fine. No particular action on my part is prompting this behavior, it just completely randomly freezes up.
I ran the console in the background to see if there are consistent messages that appear whenever these freeze-ups occur. I finally found them, apparently there is some issue with the intel integrated graphics:
fault 10:14:07.579724 +0200 kernel virtual IOReturn IOAccelEventMachine2::waitForStamp(int32_t, stamp_t, stamp_t *): initial wait for 1 second expired. Continue wait for 4 seconds. stamp 804926 (gpu_stamp=804925) fault 10:14:11.580622 +0200 kernel virtual IOReturn IOAccelEventMachine2::waitForStamp(int32_t, stamp_t, stamp_t *): timeout waiting for IntelAccelerator stamp 804926 (gpu_stamp=804925) fault 10:14:11.580639 +0200 kernel void IOAccelEventMachine2::handleFinishChannelRestart(IOReturn, int32_t, uint32_t) - Setting restart type to 4 fault 10:14:11.580643 +0200 kernel void IOAccelEventMachine2::handleFinishChannelRestart(IOReturn, int32_t, uint32_t): GPURestartDequeued stampIdx=4 type=4 fromWhere=1 waitingOnIdx=4 fault 10:14:11.580692 +0200 kernel void IOAccelEventMachine2::restart_channel(): GPURestartSkipped stampIdx=4 type=4 fault 10:14:11.580695 +0200 kernel void IOAccelEventMachine2::restart_channel(): no channel associated with stamp_idx 4 (type 4) fault 10:14:12.642643 +0200 kernel virtual IOReturn IOAccelEventMachine2::waitForStamp(int32_t, stamp_t, stamp_t *): initial wait for 1 second expired. Continue wait for 4 seconds. stamp 804927 (gpu_stamp=804926) fault 10:14:16.642803 +0200 kernel virtual IOReturn IOAccelEventMachine2::waitForStamp(int32_t, stamp_t, stamp_t *): timeout waiting for IntelAccelerator stamp 804927 (gpu_stamp=804926) fault 10:14:16.642817 +0200 kernel void IOAccelEventMachine2::handleFinishChannelRestart(IOReturn, int32_t, uint32_t) - Setting restart type to 4 fault 10:14:16.642821 +0200 kernel void IOAccelEventMachine2::handleFinishChannelRestart(IOReturn, int32_t, uint32_t): GPURestartDequeued stampIdx=4 type=4 fromWhere=1 waitingOnIdx=4 fault 10:14:16.642869 +0200 kernel void IOAccelEventMachine2::restart_channel(): GPURestartSkipped stampIdx=4 type=4 fault 10:14:16.642872 +0200 kernel void IOAccelEventMachine2::restart_channel(): no channel associated with stamp_idx 4 (type 4)
| Model Name: | MacBook Pro |
| Model Identifier: | MacBookPro11,4 |
| Processor Name: | Intel Core i7 |
| Processor Speed: | 2.2 GHz |
| Number of Processors: | 1 |
| Total Number of Cores: | 4 |
| L2 Cache (per Core): | 256 KB |
| L3 Cache: | 6 MB |
| Memory: | 16 GB |
| Boot ROM Version: | MBP114.0183.B00 |
| System Version: | macOS 10.13.5 (17F77) |
| Kernel Version: | Darwin 17.6.0 |
I was wondering if someone else has similar issues and if there are potential fixes out there. These hangs are very annoying and completely random. Also, I don't remember installing some particular piece of software before this issue started occurring, so I'm stumped as to what has changed. Could this be a hardware issue?
MacBook Pro with Retina display, macOS High Sierra (10.13.5)
