Because nothing could make the signal to noise ratio on that bug report worse than posting it to a news aggregator. Thank you, SandB0x. I'm sure everyone on Ubuntu's XOrg team appreciates it.
You make it sound as if it was posted to lipstick.com. HN mostly has very technical type of people who are well capable of debugging and eliminating issues.
Reading the bug reports, I am pretty sure that the signal to noise issue will actually be better in commments from HN folks.
