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<p>Quoting Chris Fisichella <<a href="mailto:chris@communityrenewables.com">chris@communityrenewables.com</a>>:</p>
<blockquote style="border-left:2px solid blue;margin-left:2px;padding-left:12px;" type="cite">
<p>Hi,<br>
<br>
Does anyone have any experience with removing the X cursor from a second monitor to make it workable?<br>
<br>
Thanks,<br>
Chris<br>
<br>
I have been trying to add a second monitor to my machine. I can' quite get it. I am running Debian 7.6.0 and can get the desktop to show either:<br>
1. On the original monitor (HP 2025, Nouveau driver), second monitor does not load X<br>
2. On the second monitor (Haier 760, mga driver), first monitor is black with just an underscore cursor showing<br>
3. The first monitor showing a usable window manager. I am typing in that window manager right now. Off to the right is the second monitor. I can move my cursor onto it and it turns to an X. I can't drag any windows onto that display. I arrived at this configuration by using the xorg.conf file that was generated by running<br>
<br>
#Xorg - configure<br>
<br>
In the Xorg.0.log file, I see:<br>
[ 18.165] (EE) [drm] drmOpen failed.<br>
[ 18.165] (EE) MGA(1): [drm] DRIScreenInit failed. Disabling DRI.<br>
.<br>
.<br>
.<br>
[ 18.166] (WW) MGA(1): Direct rendering disabled<br>
[ 18.166] (--) RandR disabled<br>
<br>
The entire Xorg.0.log file is below<br>
Indeed, when I run<br>
#xrandr<br>
I don't see the second display.<br>
<br>
</p>
</blockquote>
<p>I swapped out the Matrox card and installed an ATI card. It's interesting because I had the same failure mode. Can I have two cards on separate PCI busses? I noticed for both cards it first does this:<br>
<br>
[ 16.987] (--) PCI: (0:0:13:0) 10de:03d1:105b:0d15 rev 162, Mem @ 0xfb000000/16777216, 0xe0000000/268435456, 0xfa000000/16777216, BIOS @ 0x????????/131072<br>
[ 16.987] (--) PCI:*(0:1:7:0) 102b:0520:102b:ff03 rev 1, Mem @ 0xf9000000/16777216, 0xfd7fc000/16384, 0xfc800000/8388608, BIOS @ 0x????????/65536<br>
<br>
It finds both cards. One card is on bus 0 at location 13 (0xD) and the other is on bus 1 at location 7.<br>
<br>
For the card on bus 0, It finds and successfully calls<br>
[ 17.295] drmOpenDevice: node name is /dev/dri/card0<br>
[ 17.295] drmOpenDevice: open result is 9, (OK)<br>
[ 17.295] drmOpenByBusid: Searching for BusID pci:0000:00:0d.0<br>
[ 17.295] drmOpenDevice: node name is /dev/dri/card0<br>
[ 17.295] drmOpenDevice: open result is 9, (OK)<br>
[ 17.295] drmOpenByBusid: drmOpenMinor returns 9<br>
[ 17.295] drmOpenByBusid: drmGetBusid reports pci:0000:00:0d.0<br>
[ 17.295] (II) [drm] DRM interface version 1.4<br>
[ 17.295] (II) [drm] DRM open master succeeded.<br>
<br>
The call to drmOpenByBusid returns 0:0:0d.0. I believe that is the onboard video<br>
<br>
When it comes time to use the video card in the PCI slot, something different happens:<br>
[ 18.043] drmOpenDevice: node name is /dev/dri/card0<br>
[ 18.044] drmOpenDevice: open result is 11, (OK)<br>
[ 18.044] drmOpenDevice: node name is /dev/dri/card0<br>
[ 18.044] drmOpenDevice: open result is 11, (OK)<br>
[ 18.044] drmOpenByBusid: Searching for BusID pci:0000:01:07.0<br>
[ 18.044] drmOpenDevice: node name is /dev/dri/card0<br>
[ 18.044] drmOpenDevice: open result is 11, (OK)<br>
[ 18.044] drmOpenByBusid: drmOpenMinor returns 11<br>
[ 18.044] drmOpenByBusid: Interface 1.4 failed, trying 1.1<br>
[ 18.044] drmOpenByBusid: drmGetBusid reports pci:0000:00:0d.0<br>
[ 18.044] drmOpenDevice: node name is /dev/dri/card1<br>
<br>
<br>
I see the call to drmOpenByBusid, and it seems to be trying to find the card on 1:07:0. I don't know why it is still using /dev/dri/card0. The second call to drmGetByBusid then goes back to 0:d:0. /dev/dri/card1 should be the card that is on the PCI conector. Anyway, as you can see from the last email everything fails from there:<br>
<br>
[ 18.165] (EE) [drm] drmOpen failed.<br>
[ 18.165] (EE) MGA(1): [drm] DRIScreenInit failed. Disabling DRI.<br>
<br>
The same thing happened to the ATI card.<br>
<br>
Any pointers on how to troubleshoot this? Is it a software bug? User inexperience? I tried following the many posted "dual head" how-to's but they just say to use xrandr. I can't get that far with my setup.<br>
<br>
Thanks,<br>
Chris<br>
<br></p>
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