Bug 96930

Summary: No output on HDMI/DP on kernels 4.4+
Product: DRI Reporter: Adam Pribyl <covex>
Component: DRM/IntelAssignee: Intel GFX Bugs mailing list <intel-gfx-bugs>
Status: CLOSED FIXED QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: normal    
Priority: medium CC: intel-gfx-bugs
Version: XOrg git   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: HSW i915 features: display/DP

Description Adam Pribyl 2016-07-14 13:21:32 UTC 
Latest reliable kernel is 4.3.4-200.fc22.x86_64 for me. Any later is most of the times not "detecting" any monitors/output to be used in Xrog, text consoles results in a blank screen too. Even when it occasionaly starts Xorg then switching to text console is resulting in "no signal". Starting seconds Xorg session results in session not beeing correctly started. There is a e.g. https://bugzilla.redhat.com/show_bug.cgi?id=1317231 "solved" but even with 4.5.7-202.fc23.x86_64 I have no ouput on DP on the start.

This is intel NUC D54250WYK

00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller

From working session:
[    16.207] (II) intel: Driver for Intel(R) Integrated Graphics Chipsets:
        i810, i810-dc100, i810e, i815, i830M, 845G, 854, 852GM/855GM, 865G,
        915G, E7221 (i915), 915GM, 945G, 945GM, 945GME, Pineview GM,
        Pineview G, 965G, G35, 965Q, 946GZ, 965GM, 965GME/GLE, G33, Q35, Q33,
        GM45, 4 Series, G45/G43, Q45/Q43, G41, B43
[    16.207] (II) intel: Driver for Intel(R) HD Graphics: 2000-6000
[    16.207] (II) intel: Driver for Intel(R) Iris(TM) Graphics: 5100, 6100
[    16.207] (II) intel: Driver for Intel(R) Iris(TM) Pro Graphics: 5200, 6200, P6300
[    16.207] (II) modesetting: Driver for Modesetting Kernel Drivers: kms
[    16.207] (II) FBDEV: driver for framebuffer: fbdev
[    16.207] (II) VESA: driver for VESA chipsets: vesa
[    16.207] xf86EnableIOPorts: failed to set IOPL for I/O (Operation not permitted)
[    16.208] (II) intel(0): Using Kernel Mode Setting driver: i915, version 1.6.0 20151218
Comment 1 Jari Tahvanainen 2017-03-28 15:37:40 UTC 
Adam - We seem to have neglected the bug quite a bit, apologies. Do you see this problem with the latest kernel (preferable drm-tip branch from
git://anongit.freedesktop.org/drm-tip) ?

Mark this as 
REOPENED if you can reproduce (and attach kernel log) and 
RESOLVED if you cannot reproduce.

See more information for data "required" from https://01.org/linuxgraphics/documentation/how-report-bugs
Comment 2 Adam Pribyl 2017-03-30 14:49:57 UTC 
As we reported in redhat bugzilla this seems to be resolved in kernels 4.8.10+.
Thanks anyway.

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