External monitor can only copy laptop's built-in
I have a Dell Inspiron 6400 / 1505E with 1680x1050 built-in LVDS and external VGA connected to a 1680x1050 LCD monitor. I can get the external monitor to mirror the regular display, but I cannot put them side-by-side with the KDE System Settings tool. The KDE System Settings tool sees the external VGA monitor as the first monitor and the built-in LVDS as the second. When I configure the LVDS to the right of the external VGA monitor, the LVDS goes blank. When I configure the LVDS to the left of the external VGA monitor, the external VGA goes blank. What must I do to get these monitors configured? I'm using Kubuntu 9.10, KDE 4.2.2. Thanks. -- Dotan Cohen http://gibberish.co.il http://what-is-what.com ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: External monitor can only copy laptop's built-in
If you haven't done so, you need also to define a virtual screen size which is big enough to include both physical displays. You may want to have a look in man 1 xrandr. --- Omer On Fri, 2010-05-21 at 17:55 +0300, Dotan Cohen wrote: I have a Dell Inspiron 6400 / 1505E with 1680x1050 built-in LVDS and external VGA connected to a 1680x1050 LCD monitor. I can get the external monitor to mirror the regular display, but I cannot put them side-by-side with the KDE System Settings tool. The KDE System Settings tool sees the external VGA monitor as the first monitor and the built-in LVDS as the second. When I configure the LVDS to the right of the external VGA monitor, the LVDS goes blank. When I configure the LVDS to the left of the external VGA monitor, the external VGA goes blank. What must I do to get these monitors configured? I'm using Kubuntu 9.10, KDE 4.2.2. Thanks. -- One does not make peace with enemies. One makes peace with former enemies. My own blog is at http://www.zak.co.il/tddpirate/ My opinions, as expressed in this E-mail message, are mine alone. They do not represent the official policy of any organization with which I may be affiliated in any way. WARNING TO SPAMMERS: at http://www.zak.co.il/spamwarning.html ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: External monitor can only copy laptop's built-in
On 21 May 2010 18:10, Omer Zak w...@zak.co.il wrote: If you haven't done so, you need also to define a virtual screen size which is big enough to include both physical displays. You may want to have a look in man 1 xrandr. --- Omer Thank you Omer, there was no indication in the KDE dialogue that was even necessary. Going through the manpage, it looks like I need the --fb flag. However, it seems to automatically calculate the size if none is given: --fb widthxheight Reconfigures the screen to the specified size. All configured monitors must fit within this size. When this option is not pro‐ vided, xrandr computes the smallest screen size that will hold the set of configured outputs; this option provides a way to override that behaviour. In any case, the problem might be that my video driver doesn't support such a large screen: ✈dcl:~$ xrandr --fb 3360x1050 xrandr: screen cannot be larger than 1680x1680 (desired size 3360x1050) ✈dcl:~$ xrandr --fb 1680x2100 xrandr: screen cannot be larger than 1680x1680 (desired size 1680x2100) How can I check if this is a driver issue, short of installing a different driver? -- Dotan Cohen http://gibberish.co.il http://what-is-what.com ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: External monitor can only copy laptop's built-in
Which graphics chip do you have? If you have either nVidia or ATI, both have graphics utilities (and command line utilities) that are bundled with the drivers to setup dual/triple/quad monitor setup. Hetz 2010/5/21 Dotan Cohen dotanco...@gmail.com On 21 May 2010 18:10, Omer Zak w...@zak.co.il wrote: If you haven't done so, you need also to define a virtual screen size which is big enough to include both physical displays. You may want to have a look in man 1 xrandr. --- Omer Thank you Omer, there was no indication in the KDE dialogue that was even necessary. Going through the manpage, it looks like I need the --fb flag. However, it seems to automatically calculate the size if none is given: --fb widthxheight Reconfigures the screen to the specified size. All configured monitors must fit within this size. When this option is not pro‐ vided, xrandr computes the smallest screen size that will hold the set of configured outputs; this option provides a way to override that behaviour. In any case, the problem might be that my video driver doesn't support such a large screen: ✈dcl:~$ xrandr --fb 3360x1050 xrandr: screen cannot be larger than 1680x1680 (desired size 3360x1050) ✈dcl:~$ xrandr --fb 1680x2100 xrandr: screen cannot be larger than 1680x1680 (desired size 1680x2100) How can I check if this is a driver issue, short of installing a different driver? -- Dotan Cohen http://gibberish.co.il http://what-is-what.com ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il -- my blog (hebrew): http://benhamo.org Skype: heunique MSN: hetz-b...@benhamo.org ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: External monitor can only copy laptop's built-in
On Fri, May 21, 2010 at 7:15 PM, Dotan Cohen dotanco...@gmail.com wrote: On 21 May 2010 18:10, Omer Zak w...@zak.co.il wrote: If you haven't done so, you need also to define a virtual screen size which is big enough to include both physical displays. [...] ✈dcl:~$ xrandr --fb 1680x2100 xrandr: screen cannot be larger than 1680x1680 (desired size 1680x2100) From what I remember, you first have to get a large enough virtual display by putting something like the below example section into your xorg.conf and restart your X server (with that Screen active). Only then will xrandr let you place your physical screens on the display as you like, using the --pos option. Section Screen Identifier scrv Device intelgr Monitor Configured Monitor SubSection Display Virtual 2720 1680 EndSubSection EndSection ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: External monitor can only copy laptop's built-in
On 21 May 2010 19:34, Hetz Ben Hamo het...@gmail.com wrote: Which graphics chip do you have? If you have either nVidia or ATI, both have graphics utilities (and command line utilities) that are bundled with the drivers to setup dual/triple/quad monitor setup. Hetz It's an ATI MobileRadien x1400, but I'm using the FOSS drivers. -- Dotan Cohen http://gibberish.co.il http://what-is-what.com ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: External monitor can only copy laptop's built-in
I've had some success configuring xorg.conf or using the system settings configuration for the dual display. But that sometimes works, sometimes doesn't, and hard to know why (not to mention a reboot changes things back again) and very hard to give a 'recipe'. It seems to be very version-dependent or buggy to the point where it works for some people on some video cards, and may not work for others. The best solution I could find is xrandr, as Omer mentioned. xrandr *always* worked for me, even in complex configurations. Things to note: change the resolution/refresh rate of each screen to their maximum (start with xrandr -q to see where you stand, and then xrandr --output LVDS --mode YYYxZZZ). It also has switches to put one screen on the right or left of the other, and it all happens immediately. Of course, as Omer mentioned, make sure the virtual display settings are big enough for (1680+1680)x1050. Also check out the 'addmode' switches that allow you to set a very specific configuration (refresh rate, etc) on each of the monitors to really make sure you are taking advantage of it. The downside of xrandr is that you have to manually do it., and you lose the wonderful auto-detect features of xorg. Then again you can map it to a hot-key and make it work with a single click of a button. - Aviram On Friday 21 May 2010 07:55:43 Dotan Cohen wrote: I have a Dell Inspiron 6400 / 1505E with 1680x1050 built-in LVDS and external VGA connected to a 1680x1050 LCD monitor. I can get the external monitor to mirror the regular display, but I cannot put them side-by-side with the KDE System Settings tool. The KDE System Settings tool sees the external VGA monitor as the first monitor and the built-in LVDS as the second. When I configure the LVDS to the right of the external VGA monitor, the LVDS goes blank. When I configure the LVDS to the left of the external VGA monitor, the external VGA goes blank. What must I do to get these monitors configured? I'm using Kubuntu 9.10, KDE 4.2.2. Thanks. ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: External monitor can only copy laptop's built-in
On 21 May 2010 19:42, Aviram Jenik avi...@jenik.com wrote: Things to note: change the resolution/refresh rate of each screen to their maximum (start with xrandr -q to see where you stand, and then xrandr --output LVDS --mode YYYxZZZ). It also has switches to put one screen on the right or left of the other, and it all happens immediately. Of course, as Omer mentioned, make sure the virtual display settings are big enough for (1680+1680)x1050. This seems to be my problem: setting the virtual display size: ✈dcl:~$ xrandr --fb 3360x1050 xrandr: screen cannot be larger than 1680x1680 (desired size 3360x1050) ✈dcl:~$ xrandr --fb 1680x2100 xrandr: screen cannot be larger than 1680x1680 (desired size 1680x2100) Might the problem be that I need to create another virtual display as opposed to setting the current display? I don't see how to do that, in fact from the examples in the xrandr manpage it doesn't look necessary. Also check out the 'addmode' switches that allow you to set a very specific configuration (refresh rate, etc) on each of the monitors to really make sure you are taking advantage of it. The downside of xrandr is that you have to manually do it., and you lose the wonderful auto-detect features of xorg. Then again you can map it to a hot-key and make it work with a single click of a button. I have no problem with doing it manually, actually, I'd prefer that. Thanks. -- Dotan Cohen http://gibberish.co.il http://what-is-what.com ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: External monitor can only copy laptop's built-in
2010/5/21 Daniel Daboul danieldab...@gmail.com: On Fri, May 21, 2010 at 7:15 PM, Dotan Cohen dotanco...@gmail.com wrote: On 21 May 2010 18:10, Omer Zak w...@zak.co.il wrote: If you haven't done so, you need also to define a virtual screen size which is big enough to include both physical displays. [...] ✈dcl:~$ xrandr --fb 1680x2100 xrandr: screen cannot be larger than 1680x1680 (desired size 1680x2100) From what I remember, you first have to get a large enough virtual display by putting something like the below example section into your xorg.conf and restart your X server (with that Screen active). Only then will xrandr let you place your physical screens on the display as you like, using the --pos option. Section Screen Identifier scrv Device intelgr Monitor Configured Monitor SubSection Display Virtual 2720 1680 EndSubSection EndSection Current *buntu OSes complete ignore xorg.conf it seems. In 9.04 with Bulletproof X the system would at least read the changes that I made to xorg.conf, but this 9.10 version seems to ignore it completely. Googling it seems that it is _supposed_ to use xorg.conf if the user puts it there even in 9.10, however, lots of people report that their changes to the file are ignored. -- Dotan Cohen http://gibberish.co.il http://what-is-what.com ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: External monitor can only copy laptop's built-in
On Friday 21 May 2010 11:13:10 Dotan Cohen wrote: On 21 May 2010 19:42, Aviram Jenik avi...@jenik.com wrote: Things to note: change the resolution/refresh rate of each screen to their maximum (start with xrandr -q to see where you stand, and then xrandr --output LVDS --mode YYYxZZZ). It also has switches to put one screen on the right or left of the other, and it all happens immediately. Of course, as Omer mentioned, make sure the virtual display settings are big enough for (1680+1680)x1050. This seems to be my problem: setting the virtual display size: ✈dcl:~$ xrandr --fb 3360x1050 xrandr: screen cannot be larger than 1680x1680 (desired size 3360x1050) ✈dcl:~$ xrandr --fb 1680x2100 xrandr: screen cannot be larger than 1680x1680 (desired size 1680x2100) I don't think you can do it at run-time. It should be an xorg settings, but you're right that the latest ubuntus seem to ignore it. I've got no idea what configuration had my virtual screen set, but I remember setting it explicitely (until I did, I had similar results to what you're describing). - Aviram ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
