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hdmi doesnot work, randr cannot detects monitor

asked 2016-01-16 04:48:20 -0500

wuairen gravatar image

I am using a Intel compatible integrated Graphics laptop. There are both win7 and fedora22. When I connect the LCD TV panel( 1920x1080 ) via HDMI, it cannot display on it under fedora22. But it works well on win7. If it firstly boots up from win7, and enable display on this panel. And then reboot , during the whole process, no power off for both laptop and the TV panel, keeping the connection, the TV panel will keep display all the time, even after login in fedora22, and it can display video properly, while no hdmi sound. If there is power off, that is same as power on fedora22, then there will no HDMI output.

Here is some information:

lspci| grep "VGA" 00:02.0 VGA compatible controller: Intel Corporation Sky Lake Integrated Graphics (rev 07)

xrandr -q --verbose ( under HDMI works or not works condition, output for this are same. ) xrandr: Failed to get size of gamma for output default Screen 0: minimum 1920 x 1080, current 1920 x 1080, maximum 1920 x 1080 default connected primary 1920x1080+0+0 (0x180) normal (normal) 0mm x 0mm Identifier: 0x17f Timestamp: 54817 Subpixel: horizontal rgb Clones:
CRTC: 0 CRTCs: 0 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: _MUTTER_PRESENTATION_OUTPUT: 0 1920x1080 (0x180) 0.000MHz *current h: width 1920 start 0 end 0 total 1920 skew 0 clock 0.00KHz v: height 1080 start 0 end 0 total 1080 clock 0.00Hz

Could you someone help answer me, why there is no named monitor detected, such as VGA, hdmi.., even both screen works well ? How to enable hdmi output under fedora22, with Intel integrated graphics?

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answered 2016-01-16 04:57:54 -0500

zoltanh721 gravatar image

I think you gonna need to upgrade to F23, and you get newer Intel drivers to support Skylake type. Also use arandr as xrandr UI to have easy usage.

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answered 2016-11-16 15:55:56 -0500

timon gravatar image

I had the same issues on Fedora 24, with a Skylake i7 as well. I ended up replacing the kernel parameter nomodeset with i915.modeset=1 and adding i915.preliminary_hw_support=1 to the kernel parameters.

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Asked: 2016-01-16 04:48:20 -0500

Seen: 296 times

Last updated: Nov 16 '16