thanks. There is no additional drivers in the setting manager. How to add the list? Steve <verner.steven@gmail.com>编写： Are you using the open source or the proprietary drivers? Look under "additional drivers" in the settings manager. You could try using the opposite of what you are currently using(or a different proprietary if you have a list) and see what you get. <blockquote cite="mid:CAPFv0Ris2+ccM_3jg6v-brBotNS7FCX46-rTBw7Ekt88vbPR_w@mail.gmail.com" type="cite"> <div class="gmail_quote">On 10 Apr 2015 17:15, "Hartmut Haase" <<a moz-do-not-send="true" href="mailto:hha4491@web.de">hha4491@web.de</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi 雍兴辉, <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> My video card is Intel integrated GMA3600, when I choose to rotate 90 degrees in "Display Setting", the display show the message "the Signal is Lost". what can I do to support it? </blockquote> do I get you right? You have a video that you want to rotate 90°? If yes, e. g. vlc can do it. If no I don't understand at all what you want. </blockquote> </div> </blockquote>