It's pretty rare to see Linus Torvalds author patches himself pertaining to the open-source Linux graphics drivers, but waking up this morning I was surprised to see he authored and committed an Intel Xe kernel graphics driver change himself. It ended up being after he encountered a "debug session from hell" but was ultimately helped by AI in fixing a bug that had been irking him.

The patch by Linus Torvalds is for the Xe kernel driver and the change is no longer hand out the flat Compute Command Streamer (CCS) storage as usable vRAM. On a Battlemage G21 graphics card, he was hitting a scenario where there was a mismatch where the usable memory ended and hit a case where the GDM display manager would end up being endlessly restarted.

Making his patch all the more intriguing were his extra comments on the commit:

"And this was a debug session from hell, enormously helped by an AI doing much of the grunt-work.

I'd like to call it my tireless helper, but the AI several times stated flat out that this was impossible and unsolvable and that we should just write a report about it.

I suspect those things have been trained by people who may not be quite as stubborn as I am.

But while the AI was ready to give up several times, it did keep adding debug code and analyzing it faithfully when I pushed. So credit where credit is due and I let the AI write the commit message above.

This is basically a one-liner fixing a bogus "round_up()" to a "round_down()", but there were 24 patches adding more and more debug information to this, and 18 kernel boot to finally narrow it down to this. - Linus"

Linus Torvalds views AI as a useful tool and in this case reaffirmed he found it "enormously helped" his effort in tracking down this Intel graphics driver bug.

The Intel Xe driver fix is merged to Linux 7.3 Git and is also marked to back-porting to the stable kernel branches.