Puppet keeps complaining that there's an issue with the graphics resolution on t-snow-r4-0094.test.releng.scl3.mozilla.com. Please check the EDID.
t-snow-r4-0139.test.releng.scl3.mozilla.com is also complaining
both edid adapters are fine, would you like for us to run diagnostics on these machines?
They're no longer reporting issues, so I'm guessing it was a loose connection that you've fixed.