Bug 99878 - [BSW][DP] screen becomes black while booting
Summary: [BSW][DP] screen becomes black while booting
Status: CLOSED FIXED
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: DRI git
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2017-02-20 17:26 UTC by Andrew Belitsky
Modified: 2017-07-03 20:28 UTC (History)
2 users (show)

See Also:
i915 platform: BSW/CHT
i915 features: display/DP

Attachments
output of dmesg (48.40 KB, text/plain)
2017-02-20 17:26 UTC, Andrew Belitsky 		no flags Details
output of lspci -vvx (10.05 KB, text/plain)
2017-02-20 17:29 UTC, Andrew Belitsky 		no flags Details
output of dmesg with drm.debug=14 (99.72 KB, text/plain)
2017-02-20 20:03 UTC, Andrew Belitsky 		no flags Details
dmesg from ubuntu live usb (128.41 KB, text/plain)
2017-02-22 13:35 UTC, Andrew Belitsky 		no flags Details
Show Obsolete (1) View All

Description Andrew Belitsky 2017-02-20 17:26:14 UTC 
Created attachment 129760 [details]
output of dmesg

I installed Arch Linux ln Lenovo M600 (the video card is integraytd in the CPU Intel N3700)
I use kernel 4.9.9 now. If i boot the kernel with nomodeset the screen is visible but if I don't pass it the scrren becomes black while loading. The OS doesn't hang because I can connect to it though ssh and get some logs.
Comment 1 Andrew Belitsky 2017-02-20 17:29:28 UTC 
Created attachment 129761 [details]
output of lspci -vvx
Comment 2 Jani Nikula 2017-02-20 18:51:04 UTC 
Please add drm.debug=14 module parameter, *without* nomodeset, and attach dmesg again.
Comment 3 Andrew Belitsky 2017-02-20 20:03:25 UTC 
Created attachment 129779 [details]
output of dmesg with drm.debug=14
Comment 4 Jani Nikula 2017-02-22 09:19:40 UTC 
No clues in the logs that I can see. Can you try drm-tip branch of https://cgit.freedesktop.org/drm-tip please?
Comment 5 Andrew Belitsky 2017-02-22 13:33:09 UTC 
I'll try to build it.
I tried to boot ubuntu-16.04.1 from live usb. The same problem: when it begins to boot the display becomes black. But when it's loaded if I press The power button on the computer case the display turns on and everything becomes visible.
Comment 6 Andrew Belitsky 2017-02-22 13:35:33 UTC 
Created attachment 129826 [details]
dmesg from ubuntu live usb
Comment 7 Andrew Belitsky 2017-03-06 18:35:03 UTC 
I tried to connect the display to the pc with a VGA cable and everything works now.
The problem persists only if I use a DisplayPort cable for connection.
Comment 8 Elizabeth 2017-06-27 21:45:22 UTC 
(In reply to Andrew Belitsky from comment #7)
> I tried to connect the display to the pc with a VGA cable and everything
> works now.
> The problem persists only if I use a DisplayPort cable for connection.

Hello Andrew,
Is the problem still present? Have you done any change on HW or SW additional to the drm-tip? Thank you.
Comment 9 Andrew Belitsky 2017-07-01 09:10:39 UTC 
There is no such problem now, everything works fine. I'm on debian 9 with kernel 4.9.30-2+deb9u2.
Comment 10 Elizabeth 2017-07-03 20:28:01 UTC 
(In reply to Andrew Belitsky from comment #9)
> There is no such problem now, everything works fine. I'm on debian 9 with
> kernel 4.9.30-2+deb9u2.

Thank you for your answer,
Seems that the problem was fixed in newer kernel then. I'm closing this bug, if there is any new information on this case please open a new bug and share the logs and information.

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