[Bug 97958] [i915] [SKL] drm module loops between HDMI connected and disconnected

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97958

--- Comment #5 from Leo Bergolth <leo at strike.wu.ac.at> ---
I tried to force the output to connected using the kernel option
video=HDMI-A-1:D and a saved EDID block:
drm_kms_helper.edid_firmware=HDMI-A-1:edid/leo-samsung.bin.

Unfortunately this doesn't work.
After the TV had been switched off, the loop starts again.

Oct 29 00:07:40 apu kernel: [drm] Got external EDID base block and 1 extension
from "edid/leo-samsung.bin" for connector "HDMI-A-1"
Oct 29 00:07:40 apu kernel: [drm] Got external EDID base block and 1 extension
from "edid/leo-samsung.bin" for connector "HDMI-A-1"
Oct 29 00:07:44 apu kernel: [drm] Got external EDID base block and 1 extension
from "edid/leo-samsung.bin" for connector "HDMI-A-1"
Oct 29 00:07:44 apu kernel: [drm] Got external EDID base block and 1 extension
from "edid/leo-samsung.bin" for connector "HDMI-A-1"
Oct 29 00:07:47 apu kernel: [drm] Got external EDID base block and 1 extension
from "edid/leo-samsung.bin" for connector "HDMI-A-1"
Oct 29 00:07:48 apu kernel: [drm] Got external EDID base block and 1 extension
from "edid/leo-samsung.bin" for connector "HDMI-A-1"


udevadm monitor:
----------------
KERNEL[44410.060085] change   /devices/pci0000:00/0000:00:02.0/drm/card0 (drm)
UDEV  [44410.060848] change   /devices/pci0000:00/0000:00:02.0/drm/card0 (drm)
KERNEL[44410.062016] add      /devices/platform/HDMI-A-1 (platform)
KERNEL[44410.062049] remove   /devices/platform/HDMI-A-1 (platform)
UDEV  [44410.062335] add      /devices/platform/HDMI-A-1 (platform)
UDEV  [44410.062484] remove   /devices/platform/HDMI-A-1 (platform)
KERNEL[44410.150245] change   /devices/pci0000:00/0000:00:02.0/drm/card0 (drm)
UDEV  [44410.150613] change   /devices/pci0000:00/0000:00:02.0/drm/card0 (drm)
KERNEL[44410.151704] add      /devices/platform/HDMI-A-1 (platform)
KERNEL[44410.151831] remove   /devices/platform/HDMI-A-1 (platform)
UDEV  [44410.151955] add      /devices/platform/HDMI-A-1 (platform)
UDEV  [44410.152184] remove   /devices/platform/HDMI-A-1 (platform)
KERNEL[44413.899164] change   /devices/pci0000:00/0000:00:02.0/drm/card0 (drm)
UDEV  [44413.899883] change   /devices/pci0000:00/0000:00:02.0/drm/card0 (drm)
KERNEL[44413.900998] add      /devices/platform/HDMI-A-1 (platform)
KERNEL[44413.901355] remove   /devices/platform/HDMI-A-1 (platform)
UDEV  [44413.901372] add      /devices/platform/HDMI-A-1 (platform)
UDEV  [44413.901532] remove   /devices/platform/HDMI-A-1 (platform)
KERNEL[44413.989166] change   /devices/pci0000:00/0000:00:02.0/drm/card0 (drm)
UDEV  [44413.989547] change   /devices/pci0000:00/0000:00:02.0/drm/card0 (drm)
KERNEL[44413.990630] add      /devices/platform/HDMI-A-1 (platform)
KERNEL[44413.990698] remove   /devices/platform/HDMI-A-1 (platform)
UDEV  [44413.990981] add      /devices/platform/HDMI-A-1 (platform)
UDEV  [44413.991154] remove   /devices/platform/HDMI-A-1 (platform)
KERNEL[44417.779197] change   /devices/pci0000:00/0000:00:02.0/drm/card0 (drm)
UDEV  [44417.779935] change   /devices/pci0000:00/0000:00:02.0/drm/card0 (drm)
KERNEL[44417.781040] add      /devices/platform/HDMI-A-1 (platform)
KERNEL[44417.781140] remove   /devices/platform/HDMI-A-1 (platform)
UDEV  [44417.781318] add      /devices/platform/HDMI-A-1 (platform)
UDEV  [44417.781514] remove   /devices/platform/HDMI-A-1 (platform)
KERNEL[44417.869207] change   /devices/pci0000:00/0000:00:02.0/drm/card0 (drm)
UDEV  [44417.869561] change   /devices/pci0000:00/0000:00:02.0/drm/card0 (drm)
KERNEL[44417.870613] add      /devices/platform/HDMI-A-1 (platform)
KERNEL[44417.870649] remove   /devices/platform/HDMI-A-1 (platform)
UDEV  [44417.871309] add      /devices/platform/HDMI-A-1 (platform)
UDEV  [44417.871503] remove   /devices/platform/HDMI-A-1 (platform)

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