I have a Dell Latitude E5450 with a docking station k07a002 and 2 external monitors hp v241p.
Everything was working fine until I upgraded kernel to my current:
Linux Latitude-E5450 4.4.0-77-generic #98-Ubuntu SMP Wed Apr 26 08:34:02 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
Since then, when I start my laptop as usually straight plugged into the docking, after longing in I get
ERROR : could not set the configuration for CRTC 64
and all my screens go blank.
The only way I have screens working is turning on my laptop (without the docking) and plugging into the docking already logged into ubuntu. Everything works fine this way except if I press "Win-key + L" to lock my session. After that, screens go blank again.
xrandr
Screen 0: minimum 8 x 8, current 3840 x 1080, maximum 32767 x 32767 eDP1 connected (normal left inverted right x axis y axis) 1920x1080 60.00 + 59.93 48.00 1680x1050 59.95 59.88 1600x1024 60.17 1400x1050 59.98 1600x900 60.00 1280x1024 60.02 1440x900 59.89 1280x960 60.00 1368x768 60.00 1360x768 59.80 59.96 1152x864 60.00 1280x720 60.00 1024x768 60.00 1024x576 60.00 960x540 60.00 800x600 60.32 56.25 864x486 60.00 640x480 59.94 720x405 60.00 640x360 60.00 DP1 disconnected (normal left inverted right x axis y axis) DP1-1 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 476mm x 268mm 1920x1080 60.00*+ 1680x1050 59.88 1600x900 60.00 1280x1024 60.02 1440x900 59.90 1280x720 60.00 1024x768 60.00 800x600 60.32 640x480 60.00 DP1-2 disconnected (normal left inverted right x axis y axis) DP1-3 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 476mm x 268mm 1920x1080 60.00*+ 1680x1050 59.95 1600x900 60.00 1280x1024 60.02 1440x900 59.89 1280x720 60.00 1024x768 60.00 800x600 60.32 640x480 60.00 HDMI1 disconnected (normal left inverted right x axis y axis) HDMI2 disconnected (normal left inverted right x axis y axis) VIRTUAL1 disconnected (normal left inverted right x axis y axis)
sudo lshw -c video
*-display
description: VGA compatible controller
product: Haswell-ULT Integrated Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 0b
width: 64 bits
clock: 33MHz
capabilities: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:48 memory:f7800000-f7bfffff memory:e0000000-efffffff ioport:f000(size=64)
lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 0b)
X -version
X.Org X Server 1.18.4
Release Date: 2016-07-19
X Protocol Version 11, Revision 0
Build Operating System: Linux 4.4.0-45-generic x86_64 Ubuntu
Current Operating System: Linux Latitude-E5450 4.4.0-77-generic #98-Ubuntu SMP Wed Apr 26 08:34:02 UTC 2017 x86_64
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.4.0-77-generic.efi.signed root=UUID=7ff3a21b-4b0c-4898-8be1-7903408c7244 ro quiet splash vt.handoff=7
Build Date: 02 November 2016 10:06:10PM
xorg-server 2:1.18.4-0ubuntu0.2 (For technical support please see http://www.ubuntu.com/support)
Current version of pixman: 0.33.6
Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
Thank you
