<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - Discrete GPU fails to initialize and X segfaults on dual-GPU r600/radeonsi laptop" href="https://bugs.freedesktop.org/show_bug.cgi?id=70409#c2">Comment # 2</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - Discrete GPU fails to initialize and X segfaults on dual-GPU r600/radeonsi laptop" href="https://bugs.freedesktop.org/show_bug.cgi?id=70409">bug 70409</a> from <a class="email" href="mailto:calcprogrammer1@gmail.com" title="Adam Honse <calcprogrammer1@gmail.com>"> Adam Honse</a> <pre>OK, I've done more research into the issue. I started by reinstalling Ubuntu GNOME 3.10 on my laptop for a clean install, then upgraded to the most up-to-date packages in Ubuntu's repository. I have not built any custom packages. With this setup, X will not start at all. Trying to run startx fails with a segmentation fault and the error: r600: Unknown chipset 0x9900 This chipID appears to be the 7660G GPU according to this line of the Xorg log: [ 2200.372] (--) RADEON(0): Chipset: "ARUBA" (ChipID = 0x9900) Upon looking into the Xorg log, it shows that the 7660G (ARUBA) initializes acceleration via EXA while the 7730M (VERDE) initializes acceleration via glamor. Both cards have acceleration enabled, and then it segfaults before anything happens on screen. I want to use glamor acceleration on both cards as I've found it to perform better than EXA, so I added a simple xorg.conf.d file like so: Section "Device" Identifier "Radeon" Option "AccelMethod" "glamor" EndSection Now X starts, but it's back to my original problem. With xorg.conf forcing glamor acceleration, the 7660G GPU initializes EGL and glamor properly which is reflected by desktop acceleration working, but the 7730M attempts to initialize EGL and fails, being unusable for DRI PRIME (though still showing up in listproviders, twice for some reason). I have a thread on Ubuntu Forums with Xorg.log from both without and with forcing glamor. In addition when I tried to replicate the issue on my desktop, I got graphical corruption. I'll file a different bug report for that issue. <a href="http://ubuntuforums.org/showthread.php?t=2180826">http://ubuntuforums.org/showthread.php?t=2180826</a> The conversation that led to this report started here: <a href="http://phoronix.com/forums/showthread.php?84382-RadeonSI-GLAMOR-Support-Still-M-I-A-From-Ubuntu-13-10&p=363236#post363236">http://phoronix.com/forums/showthread.php?84382-RadeonSI-GLAMOR-Support-Still-M-I-A-From-Ubuntu-13-10&p=363236#post363236</a></pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>