In light of the Meltdown security vulnerability I was glad to see that an updated linux kernel was released that should help to solve it. I updated and restarted. Now my secondary display that is in i portrait configuration (clockwise rotation) is back to no rotation and I can't change it, gets an error message. Anyone know what to do or point me in the right direction to fix this?
Background:
I run LM 18.3 Cinnamon 64-bit and keep the system updated. So even with Level 5 visible in Update Manager I have nothing to upgrade at the moment. I was running kernel 4.10.0-42 without any problems and then with Meltdown fixes 4.13 series appeared/is selectable in the Linux kernels choice window in update manager. I installed the latest, 4.13.0-26 and go the problem. I've since tested with 4.13.0-16 which is the oldest selectable in 4.13 series with the same bad result so it is nothing specific to the newest version/Meltdown fix. If I boot the 4.10.0-42 which is still installed there is no problem.
When I have a 4.13 kernel loaded and open Displays, select secondary display and choose "Clockwise" in rotation the following error dialog appears and the right display goes dark. Note that "180 degrees" work. Searching for "CRTC 64" pointed me to running xrandr command so here comes that listing when 4.10.0-42 is loaded.
The display which troubles me is on DP2.
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Screen 0: minimum 8 x 8, current 3760 x 1920, maximum 32767 x 32767
DP1 connected primary 2560x1440+0+195 (normal left inverted right x axis y axis) 708mm x 398mm
2560x1440 59.95*+
1920x1200 59.95
1920x1080 60.00 60.00 50.00 50.00 59.94
1920x1080i 60.00 50.00 59.94
1680x1050 59.95
1280x1024 75.02 60.02
1440x900 74.98 59.89
1280x960 60.00
1280x720 60.00 50.00 59.94
1024x768 75.03 60.00
800x600 75.00 60.32
720x576 50.00
720x480 60.00 59.94
640x480 75.00 72.81 66.67 60.00 59.94
720x400 70.08
DP2 connected 1200x1920+2560+0 right (normal left inverted right x axis y axis) 518mm x 324mm
1920x1200 59.95*+
1920x1080 60.00 50.00 59.94 30.00 25.00 24.00 29.97 23.98
1920x1080i 60.00 50.00 59.94
1600x1200 60.00
1280x1024 75.02 60.02
1152x864 75.00
1280x720 60.00 50.00 59.94
1024x768 75.03 60.00
800x600 75.00 60.32
720x576 50.00
720x480 60.00 59.94
640x480 75.00 60.00 59.94
720x400 70.08
DP3 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
HDMI3 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
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<monitors version="1">
<configuration>
<clone>no</clone>
<output name="DP1">
<vendor>PHL</vendor>
<product>0x08e7</product>
<serial>0x00001892</serial>
<width>2560</width>
<height>1440</height>
<rate>60</rate>
<x>0</x>
<y>195</y>
<rotation>normal</rotation>
<reflect_x>no</reflect_x>
<reflect_y>no</reflect_y>
<primary>yes</primary>
</output>
<output name="DP2">
<vendor>DEL</vendor>
<product>0xa0b9</product>
<serial>0x31414553</serial>
<width>1920</width>
<height>1200</height>
<rate>60</rate>
<x>2560</x>
<y>0</y>
<rotation>right</rotation>
<reflect_x>no</reflect_x>
<reflect_y>no</reflect_y>
<primary>no</primary>
</output>
<output name="DP3">
</output>
<output name="HDMI1">
</output>
<output name="HDMI2">
</output>
<output name="HDMI3">
</output>
<output name="VIRTUAL1">
</output>
</configuration>
</monitors>
Hardware
Dell Optiplex 5050 SFF machine, 32 GiB RAM. Philips BDM3270 display (primary) and Dell U2415 display (secondary, having troubles). Both are connected via separate display port cables.
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$ inxi -Fxz
System: Host: MyMachinesHostname Kernel: 4.10.0-42-generic x86_64 (64 bit gcc: 5.4.0)
Desktop: Cinnamon 3.6.7 (Gtk 3.18.9-1ubuntu3.3) Distro: Linux Mint 18.3 Sylvia
Machine: System: Dell product: OptiPlex 5050
Mobo: Dell model: 0FDY5C v: A00 Bios: Dell v: 1.3.11 date: 05/06/2017
CPU: Quad core Intel Core i7-7700 (-HT-MCP-) cache: 8192 KB
flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 28800
clock speeds: max: 4200 MHz 1: 900 MHz 2: 900 MHz 3: 900 MHz 4: 900 MHz 5: 900 MHz 6: 900 MHz
7: 900 MHz 8: 900 MHz
Graphics: Card: Intel Device 5912 bus-ID: 00:02.0
Display Server: X.Org 1.18.4 drivers: intel (unloaded: fbdev,vesa)
Resolution: 2560x1440@59.95hz, 1920x1200@59.95hz
GLX Renderer: Mesa DRI Intel HD Graphics 630 (Kaby Lake GT2)
GLX Version: 3.0 Mesa 17.2.4 Direct Rendering: Yes
Audio: Card Intel Device a2f0 driver: snd_hda_intel bus-ID: 00:1f.3 Sound: ALSA v: k4.10.0-42-generic
Network: Card: Intel Ethernet Connection (5) I219-V driver: e1000e v: 3.2.6-k bus-ID: 00:1f.6
IF: enp0s31f6 state: up speed: 1000 Mbps duplex: full mac: <filter>
Drives: HDD Total Size: 1000.2GB (13.0% used) ID-1: /dev/nvme0n1 model: N/A size: 256.1GB
ID-2: /dev/nvme1n1 model: N/A size: 256.1GB ID-3: /dev/sda model: HGST_HTS721010A9 size: 1000.2GB
Partition: ID-1: / size: 203G used: 91G (48%) fs: ext4 dev: /dev/nvme0n1p2
ID-2: swap-1 size: 34.24GB used: 0.00GB (0%) fs: swap dev: /dev/nvme0n1p3
RAID: No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors: System Temperatures: cpu: 29.8C mobo: 27.8C
Fan Speeds (in rpm): cpu: N/A
Info: Processes: 258 Uptime: 26 min Memory: 1706.4/32056.4MB Init: systemd runlevel: 5 Gcc sys: 5.4.0
Client: Shell (bash 4.3.481) inxi: 2.2.35
Thanks in advance for any help!