<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body>
<p>
<div>
<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - black screen, X not starting since kernel >=3.15 with Haswell-ULT"
href="https://bugs.freedesktop.org/show_bug.cgi?id=90039#c23">Comment # 23</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - black screen, X not starting since kernel >=3.15 with Haswell-ULT"
href="https://bugs.freedesktop.org/show_bug.cgi?id=90039">bug 90039</a>
from <span class="vcard"><a class="email" href="mailto:conselvan2@gmail.com" title="Ander Conselvan de Oliveira <conselvan2@gmail.com>"> <span class="fn">Ander Conselvan de Oliveira</span></a>
</span></b>
<pre>(In reply to Chris Wilson from <a href="show_bug.cgi?id=90039#c21">comment #21</a>)
<span class="quote">> (In reply to Ander Conselvan de Oliveira from <a href="show_bug.cgi?id=90039#c18">comment #18</a>)
> > Looking at your dmesg, it seems X turns off all CRTCs (which is normal
> > behavior). The odd part is that after that no CRTCs are turned on.
>
> It's not X that is turning them off, the kernel reports all outputs as
> unknown status, including the one currently active.</span >
What I saw is:
[ 34.584653] [drm:drm_ioctl] pid=1987, dev=0xe200, auth=1,
DRM_IOCTL_MODE_SETCRTC
[ 34.584663] [drm:drm_mode_setcrtc] [CRTC:20]
[ 34.584667] [drm:intel_crtc_set_config] [CRTC:20] [NOFB]
...
[ 34.854489] [drm:drm_ioctl] pid=1987, dev=0xe200, auth=1,
DRM_IOCTL_MODE_SETCRTC
[ 34.854493] [drm:drm_mode_setcrtc] [CRTC:24]
[ 34.854495] [drm:intel_crtc_set_config] [CRTC:24] [NOFB]
...
[ 34.854505] [drm:drm_ioctl] pid=1987, dev=0xe200, auth=1,
DRM_IOCTL_MODE_SETCRTC
[ 34.854508] [drm:drm_mode_setcrtc] [CRTC:28]
[ 34.854510] [drm:intel_crtc_set_config] [CRTC:28] [NOFB]
I might have missed something, but that seems consistent with X behavior to me.
Before those SetCrtc calls, I see:
[ 34.075768] [drm:drm_mode_getconnector] [CONNECTOR:31:?]
[ 34.075770] [drm:drm_helper_probe_single_connector_modes_merge_bits]
[CONNECTOR:31:eDP-1]
[ 34.075772] [drm:intel_dp_detect] [CONNECTOR:31:eDP-1]
[ 34.075777] [drm:drm_helper_probe_single_connector_modes_merge_bits]
[CONNECTOR:31:eDP-1] status updated from 3 to 1
[ 34.075787] [drm:drm_add_display_info] eDP-1: Assigning EDID-1.4 digital
sink color depth as 6 bpc.
[ 34.075788] [drm:drm_edid_to_eld] ELD: no CEA Extension found
[ 34.075791] [drm:drm_helper_probe_single_connector_modes_merge_bits]
[CONNECTOR:31:eDP-1] probed modes :
[ 34.075795] [drm:drm_mode_debug_printmodeline] Modeline 32:"1920x1080" 60
138700 1920 1968 2000 2080 1080 1083 1088 1111 0x48 0xa
And I see this in drm_crtc.h
enum drm_connector_status {
connector_status_connected = 1,
connector_status_disconnected = 2,
connector_status_unknown = 3,
};
So it seems connector status changed from disconnected (3) to (1). Did I miss
something?</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the QA Contact for the bug.</li>
<li>You are on the CC list for the bug.</li>
<li>You are the assignee for the bug.</li>
</ul>
</body>
</html>