Re: RandR questions
Alex, Thank you for the clarifications. Where do I go to edit the userspace action when the digital monitor connect/disconnect interrupt is generated? --Pedro On Tue, Nov 2, 2010 at 7:43 AM, Alex Deucher alexdeuc...@gmail.com wrote: On Tue, Nov 2, 2010 at 3:01 AM, Pedro DeKeratry pdekera...@gmail.com wrote: First let me describe the behavior that prompted my questions. This is on a laptop running Ubuntu Desktop 10.10 and the xorg.conf is configured to run a mutli-display using the external HDMI and external VGA ports, thus the laptop screen is blank/off. If I unplug the HDMI connection the system does some display switching and my laptop screen turns on. When I plug the HDMI connection back in nothing happens. A couple of xrandr commands later and I can get the HDMI output displaying how it was originally. Suppose though that instead of issuing the xrandr commands to bring the external HDMI connection back up after plugging it in, I reboot the machine instead. Since my /etc/xorg.conf is unchanged I would expect that both my external monitors come up, however, the laptop screen comes on instead of my HDMI external connection which is now shown as disconnected. To get things back the way they were I can either used xrandr like previously or the ATI gfx menu options. Note that this only happens with regards to my HDMI connection because I think the laptop screen and the HDMI share the TMDS graphics hardware ( Assuming my understanding of these things is correct ; ) .) Unplugging the VGA doesn't create any auto switching response. Your laptop screen and hdmi port are likely using separate encoders, but you only have 2 display controllers so you can only use two displays at a time. Digital connectors (DVI, HDMI, DP) have a hot plug pin that can generate an interrupt when the monitor is connected or disconnected, but older analog monitors (VGA, TV) do not. So, with that said: Is is xrandr that does the auto switching from ext. HDMI to laptop automatically when HDMI monitor signal is lost? Or is that the gfx drivers or some other X program? ( I'd like to disable it if possible ) When a connect/disconnect interrupt is generated the drm sends an event to userspace which can then do something with the event. In your case I think it just runs 'xrandr --auto' when it receives the event, but you can have it do whatever you want. Is it xrandr that is saving some kind of persistent configuration settings somewhere that overrides my xorg.conf file at the next reboot? I couldn't find any sort of conf file anywhere related to this. Googling xrandr info doesn't show much except same man pages. randr does not save any persistent state. if you want to force a particular setup, you need to specify it in your xorg.conf or via xrandr commands in your desktop startup scripts. Is xrandr scheduled to replace xorg.conf altogether? I've noticed that my xorg.conf really is pretty much as minimal as you can get. In previous Linux systems I've had much more intricate xorg.conf files with a lot more details filled in. Other than loading the driver for the gfx card, it seems like everything else can be pretty much done through xrandr. Am I understanding correctly where xrandr is headed in the Linux/X world? xrandr is just a utility to dynamically reconfigure your displays. xorg.conf is for specifying specific settings. See this page for info an using xrandr and specifying display settings in your xorg.conf: http://wiki.debian.org/XStrikeForce/HowToRandR12 Alex --Pedro On Sat, Oct 30, 2010 at 4:03 AM, Jeremy Huddleston jerem...@freedesktop.org wrote: This would be a good place... On Oct 29, 2010, at 21:07, Pedro DeKeratry wrote: Hi everyone, Is this the appropriate place to ask questions about the xrandr command line utility in order to understand how it interacts with my system environment at large or is such a question better suited to a distro specific mailing list? --Pedro ___ xorg@lists.freedesktop.org: X.Org support Archives: http://lists.freedesktop.org/archives/xorg Info: http://lists.freedesktop.org/mailman/listinfo/xorg Your subscription address: jerem...@freedesktop.org ___ xorg@lists.freedesktop.org: X.Org support Archives: http://lists.freedesktop.org/archives/xorg Info: http://lists.freedesktop.org/mailman/listinfo/xorg Your subscription address: alexdeuc...@gmail.com ___ xorg@lists.freedesktop.org: X.Org support Archives: http://lists.freedesktop.org/archives/xorg Info: http://lists.freedesktop.org/mailman/listinfo/xorg Your subscription address: arch...@mail-archive.com
Re: RandR questions
First let me describe the behavior that prompted my questions. This is on a laptop running Ubuntu Desktop 10.10 and the xorg.conf is configured to run a mutli-display using the external HDMI and external VGA ports, thus the laptop screen is blank/off. If I unplug the HDMI connection the system does some display switching and my laptop screen turns on. When I plug the HDMI connection back in nothing happens. A couple of xrandr commands later and I can get the HDMI output displaying how it was originally. Suppose though that instead of issuing the xrandr commands to bring the external HDMI connection back up after plugging it in, I reboot the machine instead. Since my /etc/xorg.conf is unchanged I would expect that both my external monitors come up, however, the laptop screen comes on instead of my HDMI external connection which is now shown as disconnected. To get things back the way they were I can either used xrandr like previously or the ATI gfx menu options. Note that this only happens with regards to my HDMI connection because I think the laptop screen and the HDMI share the TMDS graphics hardware ( Assuming my understanding of these things is correct ; ) .) Unplugging the VGA doesn't create any auto switching response. So, with that said: Is is xrandr that does the auto switching from ext. HDMI to laptop automatically when HDMI monitor signal is lost? Or is that the gfx drivers or some other X program? ( I'd like to disable it if possible ) Is it xrandr that is saving some kind of persistent configuration settings somewhere that overrides my xorg.conf file at the next reboot? I couldn't find any sort of conf file anywhere related to this. Googling xrandr info doesn't show much except same man pages. Is xrandr scheduled to replace xorg.conf altogether? I've noticed that my xorg.conf really is pretty much as minimal as you can get. In previous Linux systems I've had much more intricate xorg.conf files with a lot more details filled in. Other than loading the driver for the gfx card, it seems like everything else can be pretty much done through xrandr. Am I understanding correctly where xrandr is headed in the Linux/X world? --Pedro On Sat, Oct 30, 2010 at 4:03 AM, Jeremy Huddleston jerem...@freedesktop.org wrote: This would be a good place... On Oct 29, 2010, at 21:07, Pedro DeKeratry wrote: Hi everyone, Is this the appropriate place to ask questions about the xrandr command line utility in order to understand how it interacts with my system environment at large or is such a question better suited to a distro specific mailing list? --Pedro ___ xorg@lists.freedesktop.org: X.Org support Archives: http://lists.freedesktop.org/archives/xorg Info: http://lists.freedesktop.org/mailman/listinfo/xorg Your subscription address: jerem...@freedesktop.org ___ xorg@lists.freedesktop.org: X.Org support Archives: http://lists.freedesktop.org/archives/xorg Info: http://lists.freedesktop.org/mailman/listinfo/xorg Your subscription address: arch...@mail-archive.com
Re: RandR questions
On Tue, Nov 2, 2010 at 3:01 AM, Pedro DeKeratry pdekera...@gmail.com wrote: First let me describe the behavior that prompted my questions. This is on a laptop running Ubuntu Desktop 10.10 and the xorg.conf is configured to run a mutli-display using the external HDMI and external VGA ports, thus the laptop screen is blank/off. If I unplug the HDMI connection the system does some display switching and my laptop screen turns on. When I plug the HDMI connection back in nothing happens. A couple of xrandr commands later and I can get the HDMI output displaying how it was originally. Suppose though that instead of issuing the xrandr commands to bring the external HDMI connection back up after plugging it in, I reboot the machine instead. Since my /etc/xorg.conf is unchanged I would expect that both my external monitors come up, however, the laptop screen comes on instead of my HDMI external connection which is now shown as disconnected. To get things back the way they were I can either used xrandr like previously or the ATI gfx menu options. Note that this only happens with regards to my HDMI connection because I think the laptop screen and the HDMI share the TMDS graphics hardware ( Assuming my understanding of these things is correct ; ) .) Unplugging the VGA doesn't create any auto switching response. Your laptop screen and hdmi port are likely using separate encoders, but you only have 2 display controllers so you can only use two displays at a time. Digital connectors (DVI, HDMI, DP) have a hot plug pin that can generate an interrupt when the monitor is connected or disconnected, but older analog monitors (VGA, TV) do not. So, with that said: Is is xrandr that does the auto switching from ext. HDMI to laptop automatically when HDMI monitor signal is lost? Or is that the gfx drivers or some other X program? ( I'd like to disable it if possible ) When a connect/disconnect interrupt is generated the drm sends an event to userspace which can then do something with the event. In your case I think it just runs 'xrandr --auto' when it receives the event, but you can have it do whatever you want. Is it xrandr that is saving some kind of persistent configuration settings somewhere that overrides my xorg.conf file at the next reboot? I couldn't find any sort of conf file anywhere related to this. Googling xrandr info doesn't show much except same man pages. randr does not save any persistent state. if you want to force a particular setup, you need to specify it in your xorg.conf or via xrandr commands in your desktop startup scripts. Is xrandr scheduled to replace xorg.conf altogether? I've noticed that my xorg.conf really is pretty much as minimal as you can get. In previous Linux systems I've had much more intricate xorg.conf files with a lot more details filled in. Other than loading the driver for the gfx card, it seems like everything else can be pretty much done through xrandr. Am I understanding correctly where xrandr is headed in the Linux/X world? xrandr is just a utility to dynamically reconfigure your displays. xorg.conf is for specifying specific settings. See this page for info an using xrandr and specifying display settings in your xorg.conf: http://wiki.debian.org/XStrikeForce/HowToRandR12 Alex --Pedro On Sat, Oct 30, 2010 at 4:03 AM, Jeremy Huddleston jerem...@freedesktop.org wrote: This would be a good place... On Oct 29, 2010, at 21:07, Pedro DeKeratry wrote: Hi everyone, Is this the appropriate place to ask questions about the xrandr command line utility in order to understand how it interacts with my system environment at large or is such a question better suited to a distro specific mailing list? --Pedro ___ xorg@lists.freedesktop.org: X.Org support Archives: http://lists.freedesktop.org/archives/xorg Info: http://lists.freedesktop.org/mailman/listinfo/xorg Your subscription address: jerem...@freedesktop.org ___ xorg@lists.freedesktop.org: X.Org support Archives: http://lists.freedesktop.org/archives/xorg Info: http://lists.freedesktop.org/mailman/listinfo/xorg Your subscription address: alexdeuc...@gmail.com ___ xorg@lists.freedesktop.org: X.Org support Archives: http://lists.freedesktop.org/archives/xorg Info: http://lists.freedesktop.org/mailman/listinfo/xorg Your subscription address: arch...@mail-archive.com
Re: RandR questions
This would be a good place... On Oct 29, 2010, at 21:07, Pedro DeKeratry wrote: Hi everyone, Is this the appropriate place to ask questions about the xrandr command line utility in order to understand how it interacts with my system environment at large or is such a question better suited to a distro specific mailing list? --Pedro ___ xorg@lists.freedesktop.org: X.Org support Archives: http://lists.freedesktop.org/archives/xorg Info: http://lists.freedesktop.org/mailman/listinfo/xorg Your subscription address: jerem...@freedesktop.org ___ xorg@lists.freedesktop.org: X.Org support Archives: http://lists.freedesktop.org/archives/xorg Info: http://lists.freedesktop.org/mailman/listinfo/xorg Your subscription address: arch...@mail-archive.com
