Created attachment 116065 [details] dmesg info ==System Environment== ----------------------------------------------------- Regression: Not sure , the first testing Non-working platforms: SKL desktop ==Kernel== -------------------------------------------------- commit 5267b96e584de7aa76434cc9fefad61169664c2f Author: Daniel Vetter <daniel.vetter@ffwll.ch> Date: Tue May 26 19:32:00 2015 +0200 drm-intel-nightly: 2015y-05m-26d-17h-31m-17s UTC integration manifest ==Bug detailed description== Board is RVP 11. 1, Boot up system with edp, hotplug VGA, VGA cannot be detect 2, Boot up system only with edp, enter kernel successfully. 3, Boot up system only with VGA, in the BIOS post phase VGA are working, VGA black screen before entering kernel, ssh can successfully. ==Reproduce steps== ---------------------------- 1, Only connect the VGA display 2, Boot machine
SKL doesn't have a VGA encoder, so it has to be a VGA dongle or some kind? would be interesting to know which DDI port it's connected to. A not so wild guess: DDI E (what used to be the DDI for the FDI link to PCH). We don't currently have code that initializes and support DDI E (hot plug interrupts, lane sharing with DDI A, ...). What would help is a register dump of what the BIOS does. To do that, you need to boot the machine disabling the i915 driver (for instance, don't set i915.preliminary_hw_support and boot in runlevel 3), run intel-gpu-tools' ./tools/quick_dump/quick_dump.py and attach the results here. Thanks,
There's a somewhat related bug about a HSW ULT with an embedded DP-to-VGA failing: https://bugs.freedesktop.org/show_bug.cgi?id=88590
Created attachment 116107 [details] quick_dump info
If disable i915 driver, VGA can works.
Hello Damien, Would you plan to fix this bug in i915 driver? As we disable i915, VGA is working.
just so it's not lost: 12:56 < damien_l> tjaalton: still the same idea as before, we don't initialize DDI E hope someone could pick this up soon
Presumed fixed upstream, please reopen if the problem still persists with v4.3-rc or later.
hi Prigent, Could you help to verified it? we have no this platform.
I have a SKL-H with VGA port. It does not boot at all. Assign to Ricardo to check if this test possible on your side.
Luis can you please help to review if solved now
Issue is not seen anymore over SKL - H. Intel® Graphics for Linux* | 01.org --> Getting drivers information ... [DONE] (Graphic Stack) Intel® Graphics for Linux* | 01.org Software information ============================================ Kernel version : 4.9.0-rc2-drm-intel-nightly-ww44-commit-f746a21+ Linux distribution : Ubuntu 16.04.1 LTS Architecture : 64-bit Mesa version : 12.0.0 (git-8b06176 xf86-video-intel version : 2.99.917 Xorg-Xserver version : 1.18.99.901 (1.19.0 RC 1) DRM version : 2.4.71 VAAPI version : Intel i965 driver for Intel(R) Skylake - 1.7.3.pre1 (1.7.2-140-g852cea1) Cairo version : 1.15.2 Intel GPU Tools version : Tag [intel-gpu-tools-1.16-96-g93437cb] / Commit [93437cb] Kernel driver in use : i915 Hardware acceleration : Enabled Bios revision : 106.4 Bios release date : 02/15/2016 KSC revision : 1.15 Hardware information ============================================ Motherboard model : SkylakeClientplatform Motherboard type : SkylakeHaloDDR4RVP11 Laptop Motherboard manufacturer : IntelCorporation CPU family : Other CPU information : Genuine Intel(R) CPU 0000 @ 1.60GHz GPU Card : Intel Corporation Sky Lake Integrated Graphics (rev 05) (prog-if 00 [VGA controller]) Memory ram : 16 GB Maximum memory ram allowed : 32 GB Display resolution : 1920x1080 CPU thread : 8 CPU core : 4 Socket : Other Signature : Hard drive capacity : 74GiB (80GB) Firmwares information ============================================ DMC version : 1.26
Closing bug
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