Bug 109267 - Display not working with i915 driver
Summary: Display not working with i915 driver
Status: NEW
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: XOrg git
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
Whiteboard: ReadyForDev, Triaged
Depends on:
Reported: 2019-01-10 04:56 UTC by Danni Uptlen
Modified: 2019-01-16 07:22 UTC (History)
3 users (show)

See Also:
i915 platform: GLK
i915 features: display/DSI

dmesg (58.87 KB, text/plain)
2019-01-10 04:56 UTC, Danni Uptlen
no flags Details
dmesg drm-tip (582.94 KB, text/plain)
2019-01-15 02:58 UTC, Danni Uptlen
no flags Details

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Description Danni Uptlen 2019-01-10 04:56:51 UTC
Created attachment 143051 [details]

On boot, laptop display goes black, however desktop etc loads (confirmed by swapping to tty and outputting data to file whilst still being unable to see anything).

If I boot with nomodeset and manually setting resolution to 800x1280, I can get to desktop but cannot rotate screen etc.

-- system architecture: ("uname -m")
-- kernel version: ("uname -r"). 
4.18.0-10-generic (i have attempted to use drm-tip but cannot boot, i think emmc support needs to be enabled?  I don't know how to do this)
-- Linux distribution:
xubuntu 18.10
-- Machine or mother board model:
Lenovo D330-10IGM

Happy to try drm-tip if anyone can tell me how to get it booting.

dmesg is attached
Comment 1 Denis 2019-01-10 09:28:11 UTC
>Happy to try drm-tip if anyone can tell me how to get it booting

https://01.org/linuxgraphics/documentation/build-guide-0 here you can find manual.
(could be that with defconfig you'll fail, so worse to try use simply "config" command, and use your current system config (from /boot folder, but copy it before) with a name .config (in GUI you will find this option, something like "use my own config")

As I saw, intel guys also asking for this part, when you are booted with latest drm-tip:

full dmesg from boot with kernel parameters drm.debug=0x1e log_buf_len=4M.
Comment 2 Radosław Szwichtenberg 2019-01-10 13:10:45 UTC
Thanks a lot for submitting a bug!
As Denis mentioned - Please try to reproduce the error using drm-tip (https://cgit.freedesktop.org/drm-tip) and kernel parameters drm.debug=0x1e log_buf_len=4M, and if the problem persists attach the full dmesg from boot.
Comment 3 Danni Uptlen 2019-01-15 01:38:54 UTC
I have followed the build guide and installed, however I cannot boot the new kernel.  I have been searching for some way to fix this and have asked for help in a few forums now.

I understand that this is not a help forum, but if anyone understands why this might occur after following the build guide, that would be a great help.

Gave up waiting for root device. common problems:

Boot args (cat /proc/cmdline)
Check rootdelay= (did the system wait long enough?)
Check root= (did the system wait for the right device?)
Missing modules (cat /proc/modules; ls /dev) ALERT! /dev/disk/by-uuid/blahblahblah does not exist.
Dropping to shell!
Comment 4 Danni Uptlen 2019-01-15 02:58:05 UTC
Created attachment 143114 [details]
dmesg drm-tip

please find drm-tip log file attached
Comment 5 Jani Saarinen 2019-01-15 07:12:03 UTC
CPU looks to be GLK N4000, document that.
Comment 6 Jani Saarinen 2019-01-15 07:15:28 UTC
Jani, looks like mipi/dsi issue?
Comment 7 Jani Nikula 2019-01-15 07:53:25 UTC
It's DSI all right. Might be a dupe of bug #108826. Nothing suspicious AFAICS in dmesg.
Comment 8 Jani Saarinen 2019-01-15 07:57:39 UTC
On Ci https://intel-gfx-ci.01.org/tree/drm-tip/fi-glk-dsi.html system shows nicely desktop too.
Comment 9 Jani Saarinen 2019-01-15 08:39:22 UTC
Stan, do you see pattern here?

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