EFI Shell version 2.40 [1.0] Current running mode 1.1.2 Minnowboard Max board version: A1 Certain monitors EDID seem to have issues with the MinnowBoard MAX, in particular with the Lilliput screens. Larger, more normal, monitors (eg: Dell), seem to be fine, but the Lilliputs very often won't give a display at all, sometimes requiring odd re-plugging in, or VT switching to resolve. It was thought this might get fixed with the A1 from the A0 (also seen there), but this has come up on the A1 now as well. This bug is meant as a tracking bug with respect to that.
Additional information: Darren and I both have a Lilliput 7in screen, looks to be 619A http://lilliputweb.net/resistive-touch-screen-lcd-monitors/7-inch-monitors/619a.html Darren noted that with his A0 board it worked fine, with his A1 board it did not. I just tested mine (with a cable borrowed from Pidge), and it works more or less fine. I took my board, and tested it with Darren's monitor, and was able to replicate what he's seeing. If I use my board, Darren's screen and the cable I borrowed - I get display on Darren's screen from my board. If I use my A0 board, my screen and Pidge's cable: I get no display If I use my A0 board, my Dell screen, and a different cable (hdmi <-> dvi w/ adapter), it does work
Created attachment 2034 [details] Lilliput xrandr output
Created attachment 2035 [details] BenQ
(In reply to comment #3) > Created attachment 2035 [details] > BenQ Model: Q24WS manufactured circa 2007
Ok a More detailed problem description: With some monitors the minnow just won't display anything, even at firmware boot time. It's not clear what the exact problem is. We have noticed an oddity with even specific cables which I'll detail: Monitors Known to work regardless of cable used seemingly: - Dell U2312HM Monitors Known to have issues: - Lilliput 7in screen, looks to be 619A http://lilliputweb.net/resistive-touch-screen-lcd-monitors/7-inch-monitors/619a.html EDID information from xrandr attached - BENQ Q24WS EDID information from xrandr attached Cables used: - micro-hdmi to full hdmi cable pulled from FRI2 box: works (marked A, in John's posession) - micro-hdmi to full hdmi cable pulled from FRI2 box: doesn't work (marked B, on Darren's desk) - full hdmi to dvi cable w/ micro-hdmi to hdmi adapter: works - micro-hdmi to full hdmi adapter attached to hdmi cable: doesn't work Most testing was done with the Lilliput screens, which we have two of and act consistently between the two. Using cable marked B, no MinnowBoard MAX A1 to Lilliput ever works. Only changing the cable from the B to the A cable, all tests worked.
The work-around seems to work, so I'm going to close this. We can track the issue not being "fixed" in the GOP driver in 6599