|Summary:||[chv dsi] black screen|
|Component:||DRM/Intel||Assignee:||Intel GFX Bugs mailing list <intel-gfx-bugs>|
|Status:||CLOSED FIXED||QA Contact:||Intel GFX Bugs mailing list <intel-gfx-bugs>|
|i915 platform:||BSW/CHT||i915 features:||display/DSI|
Description Juan 2016-08-13 11:38:21 UTC
Created attachment 125766 [details] dmesg output and error file I have a black screen on booting. I boot in recovery mode with option modeset=0, then I remove the module i915, and reload it again with option modeset=1. then the screens turns black but I still can send commands to the terminal. Sometimes it works well so I can go on and start normally. The system is and HP pro 608 g1 tablet with and intel atom x5-z8500 and hd graphics(CHERRYVIEW) System architecture: x86_64 Kernel: 4.8.0-rc1-hp+ (lastest drm-intel-nightly) Linux Distribution: Debian Testing I've attached dmesg output and /sys/class/drm/card0/error Thanks Juan
Comment 1 Jani Nikula 2016-08-16 11:29:02 UTC
Created attachment 125812 [details] dmesg extracted from the tarball
Comment 2 Jani Nikula 2016-08-16 11:32:52 UTC
Please remove any modeset=0 parameters, reboot, and grab the dmesg. If this leads to black screen, please try to ssh in or do it blind.
Comment 3 Juan 2016-08-16 20:18:26 UTC
Created attachment 125827 [details] Dmesg without modeset=0 I've attached three files dmesg_ok.txt when everything runs ok. dmesg_vblank_timeout.txt and Xorg.0.log when i get black screen but everything else works well so I can get these files through ssh.
Comment 4 Hans de Goede 2016-12-01 15:43:29 UTC
Created attachment 128301 [details] [review] drm/i915/dsi: Do not clear DPOUNIT_CLOCK_GATE_DISABLE from vlv_init_display_clock_gating Hi, I've been seeing this same issue on another cherrytrail tablet. After working on debugging this more or less every evening for about a week, I believe I now have a fix :) Can you please build a recent kernel with the attached patch and see if that fixes this for you ? Regards, Hans
Comment 5 Juan 2016-12-10 20:24:04 UTC
Hi, I've build lasted kernel and I have applied the attached patch and it works! Thanks a lot. You have done a great Job. Regards, Juan