2015-01-11 14:19 GMT-03:00 Alex Deucher <alexdeucher at gmail.com>: > Booting with nomodeset disables the graphics drivers so if you are > still getting problems, it may a hardware problem. Can you attach > your full dmesg and lspci output? Are you disabling the onboard > graphics when enabling the external dGPU? > > Alex >
I attached those outputs to https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1386973 I wasn't sure if you meant attaching to this response. I was able to boot with nomodeset into Ubuntu 15.04's image. I get to a graphic log in screen, but I also get some errors in the kernel log [drm:radeon_init] *ERROR* No UMS support in radeon module! Which seems by design so I assume the VESA driver was in use. I will try to boot Ubuntu 14.10 live image with nomodeset to see if I can get some error messages there. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.freedesktop.org/archives/dri-devel/attachments/20150111/33f8321b/attachment.html>