Bug#832476: xserver-common: "Broadcast RGB" auto fails on Intel HD + DisplayPort

[helios <helios.solaris@gmx.ch>]

Package: xserver-common
Version: 2:1.18.4-1
Severity: normal
Tags: newcomer

Dear Maintainer,

This has been a problem earlier with the intel driver. If "Broadcast RGB" was
set to auto, my screen connected via displayport was set to limited color space
(16-235).
I changed this by running "xrandr --output DP1 --set "Broadcast
RGB" "Full""
Somewhen later this was fixed in the driver and the command wasn't required
anymore.

However without the intel driver now, this command seems to be required again.
The display name is now DP-1 instead of DP1:
xrandr --output DP-1 --set "Broadcast RGB" "Full"


It would be better of course if the autodetection was fixed at first, but I
don't know how any of this works.
I don't think there is any DisplayPort device that requires limited color space
(Or DP-HDMI-Converters maybe?)

Intel Haswell i5-4690K
Intel HD 4600 graphics.



~$ xrandr --verbose
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192

DP-1 connected 1920x1080+0+0 (0x48) normal (normal left inverted right x axis y
axis) 510mm x 287mm
        Identifier: 0x43
        Timestamp:  4296682
        Subpixel:   unknown
        Gamma:      1.0:1.0:1.0
        Brightness: 1.0
        Clones:     HDMI-1
        CRTC:       0
        CRTCs:      0 1 2
        Transform:  1.000000 0.000000 0.000000
                    0.000000 1.000000 0.000000
                    0.000000 0.000000 1.000000
                   filter:
        EDID:
                00ffffffffffff0015c3682001010101
                14150104a5331d78e2ee95a3544c9926
                0f5054a1080081808140b30081c00101
                010101010101023a801871382d40582c
                4500fe1f1100001e000000ff00373436
                39373035310a20202020000000fd003b
                3d1f440f000a202020202020000000fc
                00455632333333570a20202020200142
                020318c0440102030423097f07830100
                0066030c00100080d50980a020e02d10
                1060a200fe1f110000188c0ad08a20e0
                2d10103e9600fe1f110000188c0ad08a
                20e02d10103e9600fe1f11000018011d
                007251d01e206e285500fe1f1100001e
                00000000000000000000000000000000
                00000000000000000000000000000033
        Broadcast RGB: Full
                supported: Automatic, Full, Limited 16:235
        audio: auto
                supported: force-dvi, off, auto, on



-- System Information:
Debian Release: stretch/sid
  APT prefers testing
  APT policy: (990, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.6.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages xserver-common depends on:
ii  x11-common     1:7.7+16
ii  x11-xkb-utils  7.7+3
ii  xkb-data       2.17-1

Versions of packages xserver-common recommends:
ii  xauth        1:1.0.9-1
ii  xfonts-base  1:1.0.4+nmu1

xserver-common suggests no packages.

-- no debconf information