Bugzilla

There have been several of these recently, all on Intel graphics hardware, using the "AppleIntelKBLGraphics" drivers:

https://crash-stats.mozilla.org/search/?mac_crash_info=~Graphics%20hardware%20encountered%20an%20error%20and%20was%20reset&date=%3E%3D2021-05-03T00%3A17%3A00.000Z&date=%3C2021-06-03T00%3A17%3A00.000Z&_facets=signature&_facets=mac_crash_info&_facets=platform_version&_sort=-date&_columns=date&_columns=signature&_columns=product&_columns=version&_columns=build_id&_columns=platform#facet-mac_crash_info

The `mac_crash_info` in all of them is as follows:

        {
          "num_records": 2,
          "records": [
            {
              "message": "abort() called",
              "module": "/usr/lib/system/libsystem_c.dylib"
            },
            {
              "module": "/System/Library/PrivateFrameworks/GPUSupport.framework/Versions/A/Libraries/libGPUSupportMercury.dylib",
              "signature_string": "Graphics hardware encountered an error and was reset: 0x00000813\n"
            }
          ]
        }

The "context error" is set to this value by a call to `IOAccelContext2::affectedByHardwareReset(bool, unsigned int)` in the `IOAcceleratorFamily2` kernel-mode graphics driver. This method is called from `IOAccelFIFOChannel2::restart()` in the same module, and gets the error number from `IGAccelFIFOChannel::getHardwareDiagnosisReport(unsigned int*)` in the `AppleIntelKBLGraphics` kernel-mode graphics driver. This method calls `IGHardwareRingBuffer::doHangAnalysis()` and `IGHardwareRingBuffer::generateHangSig()`.

I haven't managed to figure out how the error number is generated, or what it means.

There have been several of these recently, all on Intel graphics hardware, using the "AppleIntelKBLGraphics" drivers:

https://crash-stats.mozilla.org/search/?mac_crash_info=~Graphics%20hardware%20encountered%20an%20error%20and%20was%20reset&date=%3E%3D2021-05-03T00%3A17%3A00.000Z&date=%3C2021-06-03T00%3A17%3A00.000Z&_facets=signature&_facets=mac_crash_info&_facets=platform_version&_sort=-date&_columns=date&_columns=signature&_columns=product&_columns=version&_columns=build_id&_columns=platform#facet-mac_crash_info

The `mac_crash_info` in all of them is as follows:

        {
          "num_records": 2,
          "records": [
            {
              "message": "abort() called",
              "module": "/usr/lib/system/libsystem_c.dylib"
            },
            {
              "module": "/System/Library/PrivateFrameworks/GPUSupport.framework/Versions/A/Libraries/libGPUSupportMercury.dylib",
              "signature_string": "Graphics hardware encountered an error and was reset: 0x00000813\n"
            }
          ]
        }

The "context error" is set to this value by a call to `IOAccelContext2::affectedByHardwareReset(bool, unsigned int)` in the `IOAcceleratorFamily2` kernel-mode graphics driver, called from `IOAccelFIFOChannel2::restart()`. It gets the error number from `IGAccelFIFOChannel::getHardwareDiagnosisReport(unsigned int*)` in the `AppleIntelKBLGraphics` kernel-mode graphics driver. This method calls `IGHardwareRingBuffer::doHangAnalysis()` and `IGHardwareRingBuffer::generateHangSig()`.

I haven't managed to figure out how the error number is generated, or what it means.