I have this exact same issue. I have connected two displays (RGB and
HDMI cables) I've updated from Ubuntu 18.04 to 18.10. Everything was
working correctly in 18.04.
Steps to reproduce:
Case 1:
1. Start docked laptop with displays connected in the docking station
2. Undock laptop
3. Redock laptop
apport information
** Attachment added: "RfKill.txt"
https://bugs.launchpad.net/bugs/1777863/+attachment/5212978/+files/RfKill.txt
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apport information
** Attachment added: "ProcEnviron.txt"
https://bugs.launchpad.net/bugs/1777863/+attachment/5212974/+files/ProcEnviron.txt
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apport information
** Attachment added: "ProcModules.txt"
https://bugs.launchpad.net/bugs/1777863/+attachment/5212976/+files/ProcModules.txt
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apport information
** Attachment added: "CurrentDmesg.txt"
https://bugs.launchpad.net/bugs/1777863/+attachment/5212968/+files/CurrentDmesg.txt
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apport information
** Attachment added: "CRDA.txt"
https://bugs.launchpad.net/bugs/1777863/+attachment/5212967/+files/CRDA.txt
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Linux kernel: 4.18.0-11.12
Still not fixed.
Logs attached. (journalctl.log)
** Attachment added: "journalctl.log"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1777863/+attachment/5212964/+files/journalctl.log
** Changed in: linux (Ubuntu)
Status: Incomplete => New
** Tags
apport information
** Attachment added: "AlsaInfo.txt"
https://bugs.launchpad.net/bugs/1777863/+attachment/5212966/+files/AlsaInfo.txt
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apport information
** Attachment added: "IwConfig.txt"
https://bugs.launchpad.net/bugs/1777863/+attachment/5212969/+files/IwConfig.txt
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apport information
** Attachment added: "WifiSyslog.txt"
https://bugs.launchpad.net/bugs/1777863/+attachment/5212980/+files/WifiSyslog.txt
** Changed in: linux (Ubuntu)
Status: New => Confirmed
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ProblemType: Bug
ApportVersion: 2.20.10-0ubuntu13.1
Architecture: amd64
AudioDevicesInUse:
USERPID ACCESS COMMAND
/dev/snd/controlC1: lubo 1623 F pulseaudio
/dev/snd/controlC0: lubo 1623 F pulseaudio
CurrentDesktop: KDE
DistroRelease: Ubuntu 18.10
InstallationDate:
apport information
** Attachment added: "ProcCpuinfoMinimal.txt"
https://bugs.launchpad.net/bugs/1777863/+attachment/5212973/+files/ProcCpuinfoMinimal.txt
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apport information
** Attachment added: "ProcCpuinfo.txt"
https://bugs.launchpad.net/bugs/1777863/+attachment/5212972/+files/ProcCpuinfo.txt
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apport information
** Attachment added: "Lsusb.txt"
https://bugs.launchpad.net/bugs/1777863/+attachment/5212971/+files/Lsusb.txt
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apport information
** Attachment added: "ProcInterrupts.txt"
https://bugs.launchpad.net/bugs/1777863/+attachment/5212975/+files/ProcInterrupts.txt
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apport information
** Attachment added: "UdevDb.txt"
https://bugs.launchpad.net/bugs/1777863/+attachment/5212979/+files/UdevDb.txt
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apport information
** Attachment added: "Lspci.txt"
https://bugs.launchpad.net/bugs/1777863/+attachment/5212970/+files/Lspci.txt
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apport information
** Attachment added: "PulseList.txt"
https://bugs.launchpad.net/bugs/1777863/+attachment/5212977/+files/PulseList.txt
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I've updated the kernel to v4.20:
Linux citadel 4.20.0-042000-generic #201812232030 SMP Mon Dec 24 01:32:58 UTC
2018 x86_64 x86_64 x86_64 GNU/Linux
So far I've got no problem with docking and undocking. OS recognizes
both monitors with no problem.
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