<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - Same output (DisplayPort) is used in multi-head configuration for different Devices/Displays" href="https://bugs.freedesktop.org/show_bug.cgi?id=99103#c6">Comment # 6</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - Same output (DisplayPort) is used in multi-head configuration for different Devices/Displays" href="https://bugs.freedesktop.org/show_bug.cgi?id=99103">bug 99103</a> from <a class="email" href="mailto:alexdeucher@gmail.com" title="Alex Deucher <alexdeucher@gmail.com>"> Alex Deucher</a> <pre>(In reply to Stefan.LAUTERWASSER from <a href="show_bug.cgi?id=99103#c5">comment #5</a>) > (In reply to Michel Dänzer from <a href="show_bug.cgi?id=99103#c4">comment #4</a>) > > In short, this configuration (Zaphod style, with 4 screens per GPU) isn't > > supported. The radeon driver only supports 2 screens per GPU in Zaphod mode. > Sorry, I saw the restriction of 6 monitors per GPU and didn't saw any > restriction of 2 screens per GPU - I may overlooked. X screens (e.g., :0.0, :0.1) not monitors. Depending on the asics the hardware supports up to 6 monitors per GPU. You can have multiple monitors per X screen. > > Is the limit simulated or by design? I have an idea of the differences > supporting one or two, but didn't understand the differences in supporting > two or six screens - the idea of fragmentation exists already. > You don't need to explain in details, but if you are able to refer to some > background information - I am just a bit stupid and nosy. Zaphod mode is a legacy feature and as Michel said, it only supports two X screens per GPU. > > > Unless you really need multiple X11 protocol screens and/or static > > configuration in xorg.conf, I'd suggest trying without xorg.conf and letting > > the desktop environment manage the display configuration via RandR 1.4. Note > > that in this case I highly recommend using at least the xf86-video-ati 7.8.0 > > release, possibly even current Git master, and ideally a newer version of > > Xorg as well. > We use only X server with openbox - not that rich desktop environment. > I tried to configure with xrandr command but I have no idea how to create > displays without xorg.conf and I don't know how to bind a output to a > display. > I am able to create displays and output binding with xorg.conf only, can you > show me a different way/command? > But if the driver doesn't support more than 2 screens how can xrandr help? > The driver supports up to 6 monitors, but only 2 independent X screens. With randr, you have one X screen with up to 6 monitors.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>