<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - Radeon KMS fails with inaccessible AtomBIOS on systems with (U)EFI boot" href="https://bugs.freedesktop.org/show_bug.cgi?id=26891#c45">Comment # 45</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - Radeon KMS fails with inaccessible AtomBIOS on systems with (U)EFI boot" href="https://bugs.freedesktop.org/show_bug.cgi?id=26891">bug 26891</a> from <a class="email" href="mailto:agd5f@yahoo.com" title="Alex Deucher <agd5f@yahoo.com>"> Alex Deucher</a> <pre>(In reply to <a href="show_bug.cgi?id=26891#c44">comment #44</a>) > > Good news, the radeon card is recognised with an EFI stub boot only ! > > But the screens stay black !! (lcd panel and hdmi) ..., X is started because > I heard lightdm ubuntu sound, but all are black, no X and no console frame > buffer. It looks like you have a hybrid system with both an integrated GPU and a discrete GPU. You'll need to switch the mux to switch between the two GPUs (the integrated is probably selected by default). Apple has their own proprietary mux and I'm not sure how well it's supported in Linux.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>