Created attachment 128489 [details] Configuration is 8x monitors, 8x devices, 8x screens with 2x Radeon E6760 CompactPCI Boards (MEN G214) The latest version I used was from Fedora 22, 4.2.6-200.fc22.x86_64. I expect it was version 7.6 but I missed to save the log files. The current configuration is CentOS 7 3.10.0-327.36.3.el7.x86_64 with module version 7.5. I was not able to detect any failure - it just look wrong and seam to be a simple failure. Xorg configuration is 8x monitors, 8x devices, 8x screens with 2x Radeon E6760 CompactPCI Boards (MEN G214) See attached Xorg.0.log. == Result == Graphic Board ONE: Monitor 1 and 2 are aktive/working - Monitor 3 and 4 is black. Monitor 1 has Display :0.0. Monitor 2 has Display :0.3. Display :0.1 and :0.2 are working but not visible. Display :0.1 and :0.2 seams to be between Monitor 1 and 2. DisplayPort-1 will be used more often last DISPLAY is visible. Graphic Board TWO: Monitor 1 and 2 are aktive/working - Monitor 3 and 4 is black. Monitor 1 has Display :0.4. Monitor 2 has Display :0.7. Display :0.5 and :0.6 are working but not visible. Display :0.5 and :0.6 seams to be between Monitor 1 and 2. DisplayPort-1 will be used more often last DISPLAY is visible. Seams to be simple - right? I hope it is. Please help, I don't want to use fglrx driver. Oh, just for information - fglrx is working, but slower in our usecase.
Created attachment 128490 [details] xorg.conf
Created attachment 128491 [details] Xorg.0.log Please ignore "radeon.modeset=0 rd.driver.blacklist=radeon" I switched between fglrx and radeon that's the reason glx module also is not installed correctly.
May help: - Monitor numbering driver internally seams to work. - Who makes the mapping from card0-DP-1 to DisplayPort-0 etc.? The difference to fglrx driver is that the card index is not part of the name. E.g. fglrx name looks like 0-DisplayPort-0. - modes are available, but not all monitors are enabled bash> grep " connected" /var/log/Xorg.0.log [ 5443.924] (II) RADEON(0): Output DisplayPort-0 connected [ 5443.958] (II) RADEON(1): Output DisplayPort-1 connected [ 5443.992] (II) RADEON(2): Output DisplayPort-1 connected [ 5444.027] (II) RADEON(3): Output DisplayPort-1 connected [ 5444.106] (II) RADEON(4): Output DisplayPort-6 connected [ 5444.185] (II) RADEON(5): Output DisplayPort-7 connected [ 5444.264] (II) RADEON(6): Output DisplayPort-7 connected [ 5444.343] (II) RADEON(7): Output DisplayPort-7 connected bash> head -n 1 /sys/bus/pci/drivers/radeon/*/drm/card*/card*/modes ==> /sys/bus/pci/drivers/radeon/0000:05:00.0/drm/card0/card0-DP-1/modes <== 1680x1050 ==> /sys/bus/pci/drivers/radeon/0000:05:00.0/drm/card0/card0-DP-2/modes <== 1680x1050 ==> /sys/bus/pci/drivers/radeon/0000:05:00.0/drm/card0/card0-DP-3/modes <== ==> /sys/bus/pci/drivers/radeon/0000:05:00.0/drm/card0/card0-DP-4/modes <== ==> /sys/bus/pci/drivers/radeon/0000:05:00.0/drm/card0/card0-DP-5/modes <== 1680x1050 ==> /sys/bus/pci/drivers/radeon/0000:05:00.0/drm/card0/card0-DP-6/modes <== 1680x1050 ==> /sys/bus/pci/drivers/radeon/0000:06:00.0/drm/card1/card1-DP-7/modes <== 1920x1200 ==> /sys/bus/pci/drivers/radeon/0000:06:00.0/drm/card1/card1-DP-8/modes <== 1920x1200 ==> /sys/bus/pci/drivers/radeon/0000:06:00.0/drm/card1/card1-DP-9/modes <== ==> /sys/bus/pci/drivers/radeon/0000:06:00.0/drm/card1/card1-DP-10/modes <== ==> /sys/bus/pci/drivers/radeon/0000:06:00.0/drm/card1/card1-DP-11/modes <== 1920x1200 ==> /sys/bus/pci/drivers/radeon/0000:06:00.0/drm/card1/card1-DP-12/modes <== 1920x1200 bash> head -n 1 /sys/bus/pci/drivers/radeon/*/drm/card*/card*/enabled ==> /sys/bus/pci/drivers/radeon/0000:05:00.0/drm/card0/card0-DP-1/enabled <== enabled ==> /sys/bus/pci/drivers/radeon/0000:05:00.0/drm/card0/card0-DP-2/enabled <== enabled ==> /sys/bus/pci/drivers/radeon/0000:05:00.0/drm/card0/card0-DP-3/enabled <== disabled ==> /sys/bus/pci/drivers/radeon/0000:05:00.0/drm/card0/card0-DP-4/enabled <== disabled ==> /sys/bus/pci/drivers/radeon/0000:05:00.0/drm/card0/card0-DP-5/enabled <== enabled ==> /sys/bus/pci/drivers/radeon/0000:05:00.0/drm/card0/card0-DP-6/enabled <== enabled ==> /sys/bus/pci/drivers/radeon/0000:06:00.0/drm/card1/card1-DP-7/enabled <== enabled ==> /sys/bus/pci/drivers/radeon/0000:06:00.0/drm/card1/card1-DP-8/enabled <== enabled ==> /sys/bus/pci/drivers/radeon/0000:06:00.0/drm/card1/card1-DP-9/enabled <== disabled ==> /sys/bus/pci/drivers/radeon/0000:06:00.0/drm/card1/card1-DP-10/enabled <== disabled ==> /sys/bus/pci/drivers/radeon/0000:06:00.0/drm/card1/card1-DP-11/enabled <== disabled ==> /sys/bus/pci/drivers/radeon/0000:06:00.0/drm/card1/card1-DP-12/enabled <== disabled
In short, this configuration (Zaphod style, with 4 screens per GPU) isn't supported. The radeon driver only supports 2 screens per GPU in Zaphod mode. Unless you really need multiple X11 protocol screens and/or static configuration in xorg.conf, I'd suggest trying without xorg.conf and letting the desktop environment manage the display configuration via RandR 1.4. Note that in this case I highly recommend using at least the xf86-video-ati 7.8.0 release, possibly even current Git master, and ideally a newer version of Xorg as well. Alternatively, you could try combining two displays per Zaphod screen, but I'm not sure that'll work out.
(In reply to Michel Dänzer from comment #4) > In short, this configuration (Zaphod style, with 4 screens per GPU) isn't > supported. The radeon driver only supports 2 screens per GPU in Zaphod mode. Sorry, I saw the restriction of 6 monitors per GPU and didn't saw any restriction of 2 screens per GPU - I may overlooked. Is the limit simulated or by design? I have an idea of the differences supporting one or two, but didn't understand the differences in supporting two or six screens - the idea of fragmentation exists already. You don't need to explain in details, but if you are able to refer to some background information - I am just a bit stupid and nosy. > Unless you really need multiple X11 protocol screens and/or static > configuration in xorg.conf, I'd suggest trying without xorg.conf and letting > the desktop environment manage the display configuration via RandR 1.4. Note > that in this case I highly recommend using at least the xf86-video-ati 7.8.0 > release, possibly even current Git master, and ideally a newer version of > Xorg as well. We use only X server with openbox - not that rich desktop environment. I tried to configure with xrandr command but I have no idea how to create displays without xorg.conf and I don't know how to bind a output to a display. I am able to create displays and output binding with xorg.conf only, can you show me a different way/command? But if the driver doesn't support more than 2 screens how can xrandr help? > Alternatively, you could try combining two displays per Zaphod screen, but > I'm not sure that'll work out. Our safety concept currently does not allow more than one monitor per screen and display - we change that in future if we have to, but currently cannot.
(In reply to Stefan.LAUTERWASSER from comment #5) > (In reply to Michel Dänzer from comment #4) > > In short, this configuration (Zaphod style, with 4 screens per GPU) isn't > > supported. The radeon driver only supports 2 screens per GPU in Zaphod mode. > Sorry, I saw the restriction of 6 monitors per GPU and didn't saw any > restriction of 2 screens per GPU - I may overlooked. X screens (e.g., :0.0, :0.1) not monitors. Depending on the asics the hardware supports up to 6 monitors per GPU. You can have multiple monitors per X screen. > > Is the limit simulated or by design? I have an idea of the differences > supporting one or two, but didn't understand the differences in supporting > two or six screens - the idea of fragmentation exists already. > You don't need to explain in details, but if you are able to refer to some > background information - I am just a bit stupid and nosy. Zaphod mode is a legacy feature and as Michel said, it only supports two X screens per GPU. > > > Unless you really need multiple X11 protocol screens and/or static > > configuration in xorg.conf, I'd suggest trying without xorg.conf and letting > > the desktop environment manage the display configuration via RandR 1.4. Note > > that in this case I highly recommend using at least the xf86-video-ati 7.8.0 > > release, possibly even current Git master, and ideally a newer version of > > Xorg as well. > We use only X server with openbox - not that rich desktop environment. > I tried to configure with xrandr command but I have no idea how to create > displays without xorg.conf and I don't know how to bind a output to a > display. > I am able to create displays and output binding with xorg.conf only, can you > show me a different way/command? > But if the driver doesn't support more than 2 screens how can xrandr help? > The driver supports up to 6 monitors, but only 2 independent X screens. With randr, you have one X screen with up to 6 monitors.
Created attachment 132133 [details] working multi-head configuration with 8 monitors I am not sure, but I think these entry fixed the issue more or less: Section "Device" Option "ZaphodHeads" "DisplayPort-X" EndSection Also new entries are: Section "Module" Load "dri" Load "extmod" EndSection Section "DRI" Mode 0666 EndSection Section "Device" Option "AccelMethod" "glamor" Option "DRI3" "True" Option "TearFree" "True" EndSection I also have to enable the the monitors manually via xrandr after x start-up - don't know why: DISPLAY=:0.4 xrandr --output DisplayPort-1-4 --auto DISPLAY=:0.5 xrandr --output DisplayPort-1-5 --auto DISPLAY=:0.6 xrandr --output DisplayPort-1-6 --auto DISPLAY=:0.7 xrandr --output DisplayPort-1-7 --auto
Created attachment 132134 [details] working xinerama configuration with 8 monitors (slow performance) I also created and tested a Xinerama/one Display configuration. Here I also have to enable the the monitors manually via xrandr after x start-up - also don't know why: DISPLAY=:0.0 xrandr --output DisplayPort-1-4 --auto --right-of DisplayPort-3 DISPLAY=:0.0 xrandr --output DisplayPort-1-5 --auto --right-of DisplayPort-1-4 DISPLAY=:0.0 xrandr --output DisplayPort-1-6 --auto --right-of DisplayPort-1-5 DISPLAY=:0.0 xrandr --output DisplayPort-1-7 --auto --right-of DisplayPort-1-6 RESULT: Display :0.0 Screen 0: minimum 320 x 200, current 14400 x 1200, maximum 16384 x 16384 DisplayPort-0 connected primary 1920x1200+0+0 (normal left inverted right x axis y axis) 518mm x 324mm DisplayPort-1 connected 1920x1200+1920+0 (normal left inverted right x axis y axis) 518mm x 324mm DisplayPort-2 connected 1920x1200+3840+0 (normal left inverted right x axis y axis) 518mm x 324mm DisplayPort-3 connected 1920x1200+5760+0 (normal left inverted right x axis y axis) 518mm x 324mm DisplayPort-1-4 connected 1680x1050+7680+0 (normal left inverted right x axis y axis) 474mm x 296mm DisplayPort-1-5 connected 1680x1050+9360+0 (normal left inverted right x axis y axis) 474mm x 296mm DisplayPort-1-6 connected 1680x1050+11040+0 (normal left inverted right x axis y axis) 474mm x 296mm DisplayPort-1-7 connected 1680x1050+12720+0 (normal left inverted right x axis y axis) 474mm x 296mm It is working - slow - but it is working. :-)
Created attachment 132135 [details] Xorg.0.log of nearly working xinerama configuration with 8 monitors (slow performance) working multi-head configuration with 8 monitors working xinerama configuration with 8 monitors (slow performance) The reason for manual enabling the monitors looks in the Xorg.0.log file like: [ 14959.533] (II) RADEON(G0): Output DisplayPort-1-4 has no monitor section [ 14959.569] (II) RADEON(G0): Output DisplayPort-1-5 has no monitor section [ 14959.605] (II) RADEON(G0): Output DisplayPort-1-6 has no monitor section [ 14959.640] (II) RADEON(G0): Output DisplayPort-1-7 has no monitor section But I don't know how to fix these issue.
Sorry, please ignore/delete last - and this - post. The id's in the files are not matching. I have to retest it.
Created attachment 132136 [details] Xorg.0.log of nearly working xinerama configuration with 8 monitors (slow performance) working multi-head configuration with 8 monitors working xinerama configuration with 8 monitors (slow performance) The reason for manual enabling the monitors looks - after fixing identifiers - in the Xorg.0.log file like: [ 17828.932] (EE) RADEON(G0): Cannot position output DisplayPort-1-4 relative to unknown output DisplayPort-3 [ 17828.932] (EE) RADEON(G0): Cannot position output DisplayPort-1-5 relative to output DisplayPort-1-4 without modes [ 17828.932] (EE) RADEON(G0): Cannot position output DisplayPort-1-6 relative to output DisplayPort-1-5 without modes [ 17828.932] (EE) RADEON(G0): Cannot position output DisplayPort-1-7 relative to output DisplayPort-1-6 without modes But I don't know how to fix these issue. Please help.
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