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Hardware Specifications
2023 Intel® Processors - Alchemist/Arctic Sound-M Platform
2021 Intel® Processors (Formerly Rocket Lake)
2020-2021 Intel® Processors (Formerly Tiger Lake)
2020 Intel® Processors with Intel® Hybrid Technology (Formerly Lakefield)
2020 Intel® Iris® Xe MAX GPU (formerly DG1)
2019 Intel® Processors (Formerly Ice Lake)
2018-2019 Intel® Processors (Formerly Whiskey Lake)
2017-2019 Intel® Processors (Formerly Amber Lake)
2017-2019 Intel® Processors (Formerly Coffee Lake)
2019-2020 Intel® Processors (Formerly Comet Lake)
2016 Intel® Processors (Formerly Kaby Lake)
2016 Intel® Processors (Formerly Apollo Lake and Broxton)
2015-2016 Intel® Processors (Formerly Skylake)
2014 Intel® Processors (Formerly Bay Trail)
2014-2015 Intel® Processors (Formerly Cherry Trail and Braswell)
2014-2015 Intel® Processors (Formerly Broadwell)
2013 Intel® Core™ Processor Family (Formerly Haswell)
2012 Intel® Core™ Processor Family (Formerly IvyBridge)
2011 Intel® Core™ Processor Family (Formerly SandyBridge)
2010 Intel® Core™ Processor Family (Formerly Iron Lake)
Code Documentation
Bugs and Debugging
Intel® G45 Express Chipset
Intel® 965 Express Chipset Family and Intel® G35 Express Chipset Graphics Controller
Intel® Integrated Graphics Device - OpRegion Specification
Archived Documentation
How to Report Bugs
How to get Kernel Backtrace
Learn More About GFX Bug Handling
Tips that may Help to Solve your Issue in Less Timed
How to Get the GPU Error State
Recent Kernel Version
Old Kernel
Compress Instead of Crop
How to Dump Video BIOS (VBIOS)
How to Debug Suspend-Resume Issues
Using Intel® Reg-Dumper
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How to Get the GPU Error State
For all GPU-hang bugs, the most useful information is on error state.
After a hang is detected all related and helpful information gets recorded in a error state that can be grabbed as instructed below.
It must be done after the hang, but before rebooting the machine.
Recent Kernel Version
On recent kernel you can grab this information from your sysfs:
$ cat /sys/class/drm/card0/error | gzip > error.gz
Please note, that depending on your environment, it can be a different card number. But, it is probably 0.
Old Kernel
On old kernel but not older than 2.6.34 you need to get it from debugfs:
/sys/kernel/debug/dri/0/i915_error_state [2]
Anything from that file, other than "no error state collected", is very interesting and very helpful for bug reports.
[1] If you don't have a /sys/kernel/debug/dri directory, then make sure that debugfs is mounted like this:
sudo mount -t debugfs debugfs /sys/kernel/debug
[2] If you have n gpus, the directory could be also be:
/sys/kernel/debug/dri/<n>
Compress Instead of Crop
All information on this file is useful, so please never crop the file when attaching it to a bug report, Compress it instead.
Parent topic: Bugs and Debugging