Public bug reported:
Ubuntu release: 14.04.5 LTS
Kernel: linux-image-4.4.0-36-generic 4.4.0-36.55~14.04.1
I have a Dell Optiplex 7040 with an Intel Sky Lake r6 video card:
00:02.0 VGA compatible controller [0300]: Intel Corporation Sky Lake Integrated
Graphics [8086:1912] (rev 06) (prog-if 00 [VGA controller])
Subsystem: Dell Device [1028:06b9]
Flags: bus master, fast devsel, latency 0, IRQ 128
Memory at f6000000 (64-bit, non-prefetchable) [size=16M]
Memory at e0000000 (64-bit, prefetchable) [size=256M]
I/O ports at f000 [size=64]
Expansion ROM at <unassigned> [disabled]
Capabilities: <access denied>
Kernel driver in use: i915_bpo
Running trusty with the lts-xenial kernel, I get no output on the built-
in VGA port after grub has started the kernel. The monitor goes into
power-save mode. The system does boot correctly and I can ssh into it.
If I connect the monitor using one of the other ports (HDMI or
DisplayPort) everything is visible.
When only the VGA port is connected to the monitor the kernel dmesg
output contains:
[ 3.613697] i915_bpo 0000:00:02.0: DP-3: EDID block 0 invalid.
[ 3.614522] i915_bpo 0000:00:02.0: No connectors reported connected with
modes
** Affects: linux-lts-xenial (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1619677
Title:
Optiplex 7040 - No output on VGA port
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