Bug 736895 - Optimus isn't well supported
Summary: Optimus isn't well supported
Alias: None
Product: Fedora
Classification: Fedora
Component: xorg-x11-drv-nouveau
Version: 15
Hardware: x86_64
OS: Unspecified
Target Milestone: ---
Assignee: Ben Skeggs
QA Contact: Fedora Extras Quality Assurance
Whiteboard: [cat:modesetting]
Depends On:
TreeView+ depends on / blocked
Reported: 2011-09-09 02:06 UTC by Tim Wegener
Modified: 2012-08-07 15:37 UTC (History)
9 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2012-08-07 15:37:50 UTC
Type: ---

Attachments (Terms of Use)
Xorg log (38.45 KB, text/plain)
2011-09-09 02:26 UTC, Tim Wegener
no flags Details
Relevant excerpt from /var/log/messages (13.36 KB, text/plain)
2011-09-09 02:27 UTC, Tim Wegener
no flags Details

System ID Private Priority Status Summary Last Updated
Red Hat Bugzilla 691429 0 unspecified CLOSED [Sandybridge] Intel driver doesn't detect external monitor on HDMI input 2021-02-22 00:41:40 UTC

Description Tim Wegener 2011-09-09 02:06:31 UTC
Description of problem:
An external monitor connected via the HDMI port is not detected under System Settings->Displays->Detect Displays.

This seems to be similar to Bug 691429, but in my case a HDMI output is not even listed in the xrandr output:

$ xrandr -q
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
LVDS1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 194mm
   1920x1080      60.0*+   40.0  
   1400x1050      60.0  
   1280x1024      60.0  
   1280x960       60.0  
   1024x768       60.0  
   800x600        60.3     56.2  
   640x480        59.9  
VGA1 disconnected (normal left inverted right x axis y axis)

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Connect external monitor to HDMI port
2. Go to System Settings->Displays
3. Click Detect Displays
Actual results:
External monitor is not detected.

Expected results:
External monitor should be detected and used.

Additional info:
Dell Latitude E6520
Intel® Core™ i7-2720QM CPU @ 2.20GHz × 8 
Intel® Sandybridge Mobile

The monitor has been used successfully with another laptop.

Booting with nomodeset did not help (but rather made things worse).
Turning off Optimus mode in the bios didn't help (but rather made things worse).

Comment 1 Tim Wegener 2011-09-09 02:25:31 UTC
More info:

$ lsmod |egrep 'nou|i915'
i915                  378728  2 
nouveau               545642  0 
ttm                    55273  1 nouveau
drm_kms_helper         26474  2 i915,nouveau
drm                   193923  5 i915,nouveau,ttm,drm_kms_helper
i2c_algo_bit            4974  2 i915,nouveau
i2c_core               25712  7 i2c_i801,videodev,i915,nouveau,drm_kms_helper,drm,i2c_algo_bit
mxm_wmi                 1727  1 nouveau
video                  12340  2 i915,nouveau

$ lspci -v |grep VGA
00:02.0 VGA compatible controller: Intel Corporation Device 0126 (rev 09) (prog-if 00 [VGA controller])
01:00.0 VGA compatible controller: nVidia Corporation Device 1056 (rev a1) (prog-if 00 [VGA controller])

FWIW, in case there is any chance that this is related/relevant: there have also been (ACPI?) problems with this laptop, e.g. it can't reboot (it just hangs at the final point where normally it should reboot).

Comment 2 Tim Wegener 2011-09-09 02:26:25 UTC
Created attachment 522230 [details]
Xorg log

Xorg log

Comment 3 Tim Wegener 2011-09-09 02:27:05 UTC
Created attachment 522231 [details]
Relevant excerpt from /var/log/messages

Comment 4 Adam Jackson 2011-10-11 16:13:27 UTC
Sorry, that's how Optimus works.  The non-LVDS digital outputs are only connected to the nvidia chip.

Comment 5 Ben Skeggs 2011-12-06 22:57:32 UTC
It's also worth noting your NVIDIA GPU is GF119, which while the graphics part of the chip is still a Fermi (current generation codename), NVIDIA redesigned quite a lot of other areas (including the display).  This chipset was not supported in F15 (I don't think it was even around when F15 was released).

F16 and up support your chipset, and if you're willing to setup an xorg.conf with multiple X screens (ie. you won't be able to move windows between them) you should get some functionality out of your external monitor.

Comment 6 Tim Wegener 2011-12-19 04:22:29 UTC
This should probably be marked as duplicate of Bug 691429.

FWIW, I worked around it by just using analog VGA instead of HDMI for the external monitor.

Comment 7 Fedora End Of Life 2012-08-07 15:37:53 UTC
This message is a notice that Fedora 15 is now at end of life. Fedora
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