Top-posting seems appropriate to say that I think this has been fixed in latest git and possibly 2.20.6. I will report back if not. Thank you, Grant >>> '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
