On Thu, 16 Aug 2012 04:19:26 -0700, Grant <emailgrant at gmail.com> wrote: > 'xset dpms force off; sleep 1; xset dpms force on' does indeed trigger > the error. I've attached my Xorg.0.log.old which includes the > segfault backtrace. I'm like a newborn baby when it comes to > compiling and Gentoo doesn't have a debug USE flag for > xf86-video-intel or xorg-server so I can't help there. Is there a > different package I should check for a debug USE flag? In the Xorg.log, the first error appears to be a failed modeset after resume: [ 5131.319] (II) AIGLX: Resuming AIGLX clients after VT switch [ 5131.319] (II) intel(0): switch to mode 1366x768 on crtc 3 (pipe 0) [ 5131.319] (EE) intel(0): failed to set mode: Invalid argument [ 5131.319] (WW) intel(0): failed to restore desired modes on VT switch That is going to leave the screens blank. And the subsequent segfault suggests that I don't have sufficient safeguards to handle that failure. Can you please run 'addr2line -e /usr/lib64/xorg/modules/drivers/intel_drv.so 0xb9ed7 0x68517 0x5aa2e' ? To solve what happened to prevent the modeswitch we need to have the dmesg, preferrably with drm.debug=6 (echo 6 > /sys/modules/drm/parameters/debug). Compiling a debug driver is pretty straightforward. $ git clone git://anongit.freedesktop.org/xorg/driver/xf86-video-intel $ cd xf86-video-intel $ ./autogen.sh --prefix=/usr --enable-debug=full $ make && sudo make install This will overwrite the system driver and so not need any modification to config files. (It is possible to install into local and change /etc/X11/xorg.conf to load the driver from there.) So just reinstall your distro package to revert. -Chris -- Chris Wilson, Intel Open Source Technology Centre
