<div dir="ltr"><span style="font-size:14px"> I have a video card gtx 650. I failed to switch user use "dm-tool switch-to-user $USER". In logfile /var/log/Xorg.1.log I see driver is not set to nvidia so it failed.</span><div style="font-size:14px">  But if I generate xorg.conf with nvidia-xconfig, user switching works fine. Seems that lightdm missed the xorg config somewhere. I also tried gdm3, it works without xorg.conf.​<br><div class="gmail_chip gmail_drive_chip" style="width:396px;height:18px;max-height:18px;background-color:#f5f5f5;padding:5px;color:#222;font-family:arial;font-style:normal;font-weight:bold;font-size:13px;border:1px solid #ddd;line-height:1"><a href="https://drive.google.com/file/d/0BxsxfYzEGk6aTTdxUXBmbjFkOEphVXZYand2aFN1SkgyYm9r/view?usp=drive_web" target="_blank" style="display:inline-block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;text-decoration:none;padding:1px 0px;border:none;width:100%"><img style="vertical-align: bottom; border: none;" src="https://ssl.gstatic.com/docs/doclist/images/generic_app_icon_16.png"> <span dir="ltr" style="color:#15c;text-decoration:none;vertical-align:bottom">Xorg.0.log</span></a></div>​​<br><div class="gmail_chip gmail_drive_chip" style="width:396px;height:18px;max-height:18px;background-color:#f5f5f5;padding:5px;color:#222;font-family:arial;font-style:normal;font-weight:bold;font-size:13px;border:1px solid #ddd;line-height:1"><a href="https://drive.google.com/file/d/0BxsxfYzEGk6aTkN1OVUwR2FINS16V203SEw2Sk9xNUQyci1z/view?usp=drive_web" target="_blank" style="display:inline-block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;text-decoration:none;padding:1px 0px;border:none;width:100%"><img style="vertical-align: bottom; border: none;" src="https://ssl.gstatic.com/docs/doclist/images/generic_app_icon_16.png"> <span dir="ltr" style="color:#15c;text-decoration:none;vertical-align:bottom">Xorg.1.log</span></a></div>​</div></div>