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Faraclas
Tux's lil' helper
Joined: 08 Dec 2014
Posts: 117
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 Posted: Mon Mar 16, 2015 4:06 pm Post subject: Nvidia / IntelHD Optimus Problems [Solved] |
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For complete background see my build notes: https://docs.google.com/document/d/1ceLv8lyxv4660QfIuklbRJb0ozh_zeSfaty2FLKhtr0/edit?usp=sharing
This is very similar to this issue but I think different enough as well: https://forums.gentoo.org/viewtopic-t-1010746.html
In summary, the computer shipped with Ubuntu and before I wiped the drive to start over, I copied the Ubuntu installation over to an external SSD which I can still boot off of. In Ubuntu, all monitors are working well (multiples work, hot-plugging works) and glxgears is showing 6000+ FPS. In Gentoo, all monitors are not working (no externals work, no hotplugging) and glxgears is showing 500 FPS.
I'm using the XRandR commands by adding the following into /etc/gdm/Init/Default
| Code: | #Lines added for optimus
exec xrandr --setprovideroutputsource modesetting NVIDIA-0
exec xrandr --auto |
and here is my xorg.conf
| Code: | Section "ServerLayout"
Identifier "layout"
Screen 0 "nvidia"
Inactive "intel"
EndSection
Section "Device"
Identifier "nvidia"
Driver "nvidia"
BusID "PCI:2:0:0"
# Option "ConstrainCursor" "off"
EndSection
Section "Screen"
Identifier "nvidia"
Device "nvidia"
Option "AllowEmptyInitialConfiguration"
# Option "IgnoreDisplayDevices" "CRT"
EndSection
Section "Device"
Identifier "intel"
Driver "modesetting"
# BusID "PCI:0:2:0"
Option "AccelMethod" "SNA"
#Option "AccelMethod" "none"
EndSection
Section "Screen"
Identifier "intel"
Device "intel"
EndSection |
The interesting thing to me is that
a) I cannot find any similar XRandR lines anywhere on the Ubuntu system. It doesn't mean it doesn't exist, but I couldn't find it.
b) The Ubuntu xorg.conf section for the intel device looks like this:
| Code: | Excerpt from Ubuntu’s xorg.conf
Section "Device"
Identifier "intel"
Driver "intel"
BusID "PCI:0@0:2:0"
Option "AccelMethod" "SNA"
EndSection |
And it is interesting that Ubuntu is using "intel" and not "modesetting" for the driver. However, if I try that I get a black screen probably becuase of the xrandr line specifying modesetting. To get the modesetting line to work, I added modesetting to my VIDEO_CARDS in make.conf as
| Code: | | VIDEO_CARDS="intel i965 nvidia modesetting" |
I also tried setting the xrandr line to be
| Code: | | exec xrandr --setprovideroutputsource intel NVIDIA-0 |
but got a black screen here.
Here is the Xorg Log from Gentoo (extracted from journalctl): https://bpaste.net/show/01b187d1c458
Here is the Xorg Log from Ubuntu: http://paste.ubuntu.com/10608257/
HOWEVER (from the Ubuntu log)
| Code: | [ 14.775] (II) intel(G0): SNA initialized with Haswell (gen7.5, gt2) backend
[ 14.775] (==) intel(G0): Backing store enabled
[ 14.775] (==) intel(G0): Silken mouse enabled
[ 14.775] (II) intel(G0): HW Cursor enabled
[ 14.775] (II) intel(G0): RandR 1.2 enabled, ignore the following RandR disabled message.
[ 14.776] (==) intel(G0): DPMS enabled
[ 14.776] (II) intel(G0): [DRI2] Setup complete
[ 14.776] (II) intel(G0): [DRI2] DRI driver: i965
[ 14.776] (II) intel(G0): [DRI2] VDPAU driver: i965
[ 14.776] (II) intel(G0): direct rendering: DRI2 enabled
[ 14.776] (II) intel(G0): hardware support for Present enabled
[ 14.776] (WW) intel(G0): Option "AllowEmptyInitialConfiguration" is not used
[ 14.776] (WW) intel(G0): Option "IgnoreDisplayDevices" is not used
[ 14.776] (==) intel(G0): display hotplug detection enabled |
We can see that RandR is enabled form the intel driver and the intel driver is handling the hotplug.
So basically, how can I make my system do what the Ubuntu system is doing?
Thanks!!! |
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Faraclas
Tux's lil' helper
Joined: 08 Dec 2014
Posts: 117
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| Posted: Sat Mar 21, 2015 7:09 am Post subject: |
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Basically I was going about it the wrong way. Ubuntu was using Primus / Bumblebee and just not being open about it.
I installed Bumblebee and then primus. It is working GREAT!
Obviously, steam and the games run much better using primusrun. The interesting thing is that I also now use primusrun to launch VirtualBox. My Win8 VM is running at near native speeds.  |
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