>> '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' ? I reproduced the segfault on my other (identical) laptop and got: [ 10865.673] 3: /usr/lib64/xorg/modules/drivers/intel_drv.so (0x7f5cf32f5000+0x39ba5) [0x7f5cf332eba5] [ 10865.673] 4: /usr/lib64/xorg/modules/drivers/intel_drv.so (0x7f5cf32f5000+0x47015) [0x7f5cf333c015] [ 10865.673] 5: /usr/lib64/xorg/modules/drivers/intel_drv.so (0x7f5cf32f5000+0x4bc29) [0x7f5cf3340c29] [ 10865.673] 6: /usr/lib64/xorg/modules/drivers/intel_drv.so (0x7f5cf32f5000+0x57708) [0x7f5cf334c708] so I changed the command: # addr2line -e /usr/lib64/xorg/modules/drivers/intel_drv.so 0x39ba5 0x47015 0x4bc29 0x57708 ??:0 ??:0 ??:0 ??:0 # > 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). I've attached kern.log since the segfault. It looks like there's some good stuff in there. > 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 If it's still necessary for me to do so, please tell me how to install into a folder (/usr/local ?) that I can delete later to completely wipe out the install. Thanks, Grant -------------- next part -------------- A non-text attachment was scrubbed... Name: kern.log Type: application/octet-stream Size: 49068 bytes Desc: not available URL: <http://lists.freedesktop.org/archives/intel-gfx/attachments/20120818/6753e427/attachment-0001.obj>
