KDE Bar freezes several time on XRDP

[Abinayasandhiya]

Hi,

Server: RHEL6 and RHEL7 KDE bar freezes on several times while invoke a connection via XRDP. cause of this issue cannot be find in XRDP log too.

Can anyone please help us on this.

Any solution/suggestion would be appreciated.

[jsorg71]

I see this too. Not sure what's happening.

[abdnasee]

@jsorg71 Is this somehow relates to the XRDP ?

[jsorg71]

it may be. Can you share your output from lspci. I see it on multi GPU system.

[Abinayasandhiya]

Hi @jsorg71 ,

FYI:

`[root@XXX xrdp]$ lspci 00:00.0 Host bridge: Intel Corporation Xeon E5/Core i7 DMI2 (rev 07) 00:01.0 PCI bridge: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 1a (rev 07) 00:01.1 PCI bridge: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 1b (rev 07) 00:02.0 PCI bridge: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 2a (rev 07) 00:02.1 PCI bridge: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 2b (rev 07) 00:02.2 PCI bridge: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 2c (rev 07) 00:02.3 PCI bridge: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 2d (rev 07) 00:03.0 PCI bridge: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 3a in PCI Express Mode (rev 07) 00:03.1 PCI bridge: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 3b (rev 07) 00:03.2 PCI bridge: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 3c (rev 07) 00:03.3 PCI bridge: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 3d (rev 07) 00:04.0 System peripheral: Intel Corporation Xeon E5/Core i7 DMA Channel 0 (rev 07) 00:04.1 System peripheral: Intel Corporation Xeon E5/Core i7 DMA Channel 1 (rev 07) 00:04.2 System peripheral: Intel Corporation Xeon E5/Core i7 DMA Channel 2 (rev 07) 00:04.3 System peripheral: Intel Corporation Xeon E5/Core i7 DMA Channel 3 (rev 07) 00:04.4 System peripheral: Intel Corporation Xeon E5/Core i7 DMA Channel 4 (rev 07) 00:04.5 System peripheral: Intel Corporation Xeon E5/Core i7 DMA Channel 5 (rev 07) 00:04.6 System peripheral: Intel Corporation Xeon E5/Core i7 DMA Channel 6 (rev 07) 00:04.7 System peripheral: Intel Corporation Xeon E5/Core i7 DMA Channel 7 (rev 07) 00:05.0 System peripheral: Intel Corporation Xeon E5/Core i7 Address Map, VTd_Misc, System Management (rev 07) 00:05.2 System peripheral: Intel Corporation Xeon E5/Core i7 Control Status and Global Errors (rev 07) 00:05.4 PIC: Intel Corporation Xeon E5/Core i7 I/O APIC (rev 07) 00:11.0 PCI bridge: Intel Corporation C600/X79 series chipset PCI Express Virtual Root Port (rev 05) 00:1a.0 USB controller: Intel Corporation C600/X79 series chipset USB2 Enhanced Host Controller #2 (rev 05) 00:1c.0 PCI bridge: Intel Corporation C600/X79 series chipset PCI Express Root Port 1 (rev b5) 00:1c.7 PCI bridge: Intel Corporation C600/X79 series chipset PCI Express Root Port 8 (rev b5) 00:1d.0 USB controller: Intel Corporation C600/X79 series chipset USB2 Enhanced Host Controller #1 (rev 05) 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev a5) 00:1f.0 ISA bridge: Intel Corporation C600/X79 series chipset LPC Controller (rev 05) 01:00.0 System peripheral: Hewlett-Packard Company Integrated Lights-Out Standard Slave Instrumentation & System Support (rev 05) 01:00.1 VGA compatible controller: Matrox Electronics Systems Ltd. MGA G200EH 01:00.2 System peripheral: Hewlett-Packard Company Integrated Lights-Out Standard Management Processor Support and Messaging (rev 05) 01:00.4 USB controller: Hewlett-Packard Company Integrated Lights-Out Standard Virtual USB Controller (rev 02) 03:00.0 RAID bus controller: Hewlett-Packard Company Smart Array Gen8 Controllers (rev 01) 04:00.0 Ethernet controller: Emulex Corporation OneConnect 10Gb NIC (be3) (rev 01) 04:00.1 Ethernet controller: Emulex Corporation OneConnect 10Gb NIC (be3) (rev 01) 04:00.2 Mass storage controller: Emulex Corporation OneConnect 10Gb iSCSI Initiator (be3) (rev 01) 04:00.3 Mass storage controller: Emulex Corporation OneConnect 10Gb iSCSI Initiator (be3) (rev 01) 1f:08.0 System peripheral: Intel Corporation Xeon E5/Core i7 QPI Link 0 (rev 07) 1f:08.3 System peripheral: Intel Corporation Xeon E5/Core i7 QPI Link Reut 0 (rev 07) 1f:08.4 System peripheral: Intel Corporation Xeon E5/Core i7 QPI Link Reut 0 (rev 07) 1f:09.0 System peripheral: Intel Corporation Xeon E5/Core i7 QPI Link 1 (rev 07) 1f:09.3 System peripheral: Intel Corporation Xeon E5/Core i7 QPI Link Reut 1 (rev 07) 1f:09.4 System peripheral: Intel Corporation Xeon E5/Core i7 QPI Link Reut 1 (rev 07) 1f:0a.0 System peripheral: Intel Corporation Xeon E5/Core i7 Power Control Unit 0 (rev 07) 1f:0a.1 System peripheral: Intel Corporation Xeon E5/Core i7 Power Control Unit 1 (rev 07) 1f:0a.2 System peripheral: Intel Corporation Xeon E5/Core i7 Power Control Unit 2 (rev 07) 1f:0a.3 System peripheral: Intel Corporation Xeon E5/Core i7 Power Control Unit 3 (rev 07) 1f:0b.0 System peripheral: Intel Corporation Xeon E5/Core i7 Interrupt Control Registers (rev 07) 1f:0b.3 System peripheral: Intel Corporation Xeon E5/Core i7 Semaphore and Scratchpad Configuration Registers (rev 07) 1f:0c.0 System peripheral: Intel Corporation Xeon E5/Core i7 Unicast Register 0 (rev 07) 1f:0c.1 System peripheral: Intel Corporation Xeon E5/Core i7 Unicast Register 0 (rev 07) 1f:0c.2 System peripheral: Intel Corporation Xeon E5/Core i7 Unicast Register 0 (rev 07) 1f:0c.3 System peripheral: Intel Corporation Xeon E5/Core i7 Unicast Register 0 (rev 07) 1f:0c.6 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller System Address Decoder 0 (rev 07) 1f:0c.7 System peripheral: Intel Corporation Xeon E5/Core i7 System Address Decoder (rev 07) 1f:0d.0 System peripheral: Intel Corporation Xeon E5/Core i7 Unicast Register 0 (rev 07) 1f:0d.1 System peripheral: Intel Corporation Xeon E5/Core i7 Unicast Register 0 (rev 07) 1f:0d.2 System peripheral: Intel Corporation Xeon E5/Core i7 Unicast Register 0 (rev 07) 1f:0d.3 System peripheral: Intel Corporation Xeon E5/Core i7 Unicast Register 0 (rev 07) 1f:0d.6 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller System Address Decoder 1 (rev 07) 1f:0e.0 System peripheral: Intel Corporation Xeon E5/Core i7 Processor Home Agent (rev 07) 1f:0e.1 Performance counters: Intel Corporation Xeon E5/Core i7 Processor Home Agent Performance Monitoring (rev 07) 1f:0f.0 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Registers (rev 07) 1f:0f.1 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller RAS Registers (rev 07) 1f:0f.2 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Target Address Decoder 0 (rev 07) 1f:0f.3 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Target Address Decoder 1 (rev 07) 1f:0f.4 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Target Address Decoder 2 (rev 07) 1f:0f.5 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Target Address Decoder 3 (rev 07) 1f:0f.6 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Target Address Decoder 4 (rev 07) 1f:10.0 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Channel 0-3 Thermal Control 0 (rev 07) 1f:10.1 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Channel 0-3 Thermal Control 1 (rev 07) 1f:10.2 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller ERROR Registers 0 (rev 07) 1f:10.3 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller ERROR Registers 1 (rev 07) 1f:10.4 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Channel 0-3 Thermal Control 2 (rev 07) 1f:10.5 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Channel 0-3 Thermal Control 3 (rev 07) 1f:10.6 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller ERROR Registers 2 (rev 07) 1f:10.7 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller ERROR Registers 3 (rev 07) 1f:11.0 System peripheral: Intel Corporation Xeon E5/Core i7 DDRIO (rev 07) 1f:13.0 System peripheral: Intel Corporation Xeon E5/Core i7 R2PCIe (rev 07) 1f:13.1 Performance counters: Intel Corporation Xeon E5/Core i7 Ring to PCI Express Performance Monitor (rev 07) 1f:13.4 Performance counters: Intel Corporation Xeon E5/Core i7 QuickPath Interconnect Agent Ring Registers (rev 07) 1f:13.5 Performance counters: Intel Corporation Xeon E5/Core i7 Ring to QuickPath Interconnect Link 0 Performance Monitor (rev 07) 1f:13.6 System peripheral: Intel Corporation Xeon E5/Core i7 Ring to QuickPath Interconnect Link 1 Performance Monitor (rev 07) 20:00.0 PCI bridge: Intel Corporation Xeon E5/Core i7 DMI2 in PCI Express Mode (rev 07) 20:01.0 PCI bridge: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 1a (rev 07) 20:01.1 PCI bridge: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 1b (rev 07) 20:02.0 PCI bridge: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 2a (rev 07) 20:02.1 PCI bridge: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 2b (rev 07) 20:02.2 PCI bridge: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 2c (rev 07) 20:02.3 PCI bridge: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 2d (rev 07) 20:03.0 PCI bridge: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 3a in PCI Express Mode (rev 07) 20:03.1 PCI bridge: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 3b (rev 07) 20:03.2 PCI bridge: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 3c (rev 07) 20:03.3 PCI bridge: Intel Corporation Xeon E5/Core i7 IIO PCI Express Root Port 3d (rev 07) 20:04.0 System peripheral: Intel Corporation Xeon E5/Core i7 DMA Channel 0 (rev 07) 20:04.1 System peripheral: Intel Corporation Xeon E5/Core i7 DMA Channel 1 (rev 07) 20:04.2 System peripheral: Intel Corporation Xeon E5/Core i7 DMA Channel 2 (rev 07) 20:04.3 System peripheral: Intel Corporation Xeon E5/Core i7 DMA Channel 3 (rev 07) 20:04.4 System peripheral: Intel Corporation Xeon E5/Core i7 DMA Channel 4 (rev 07) 20:04.5 System peripheral: Intel Corporation Xeon E5/Core i7 DMA Channel 5 (rev 07) 20:04.6 System peripheral: Intel Corporation Xeon E5/Core i7 DMA Channel 6 (rev 07) 20:04.7 System peripheral: Intel Corporation Xeon E5/Core i7 DMA Channel 7 (rev 07) 20:05.0 System peripheral: Intel Corporation Xeon E5/Core i7 Address Map, VTd_Misc, System Management (rev 07) 20:05.2 System peripheral: Intel Corporation Xeon E5/Core i7 Control Status and Global Errors (rev 07) 20:05.4 PIC: Intel Corporation Xeon E5/Core i7 I/O APIC (rev 07) 3f:08.0 System peripheral: Intel Corporation Xeon E5/Core i7 QPI Link 0 (rev 07) 3f:08.3 System peripheral: Intel Corporation Xeon E5/Core i7 QPI Link Reut 0 (rev 07) 3f:08.4 System peripheral: Intel Corporation Xeon E5/Core i7 QPI Link Reut 0 (rev 07) 3f:09.0 System peripheral: Intel Corporation Xeon E5/Core i7 QPI Link 1 (rev 07) 3f:09.3 System peripheral: Intel Corporation Xeon E5/Core i7 QPI Link Reut 1 (rev 07) 3f:09.4 System peripheral: Intel Corporation Xeon E5/Core i7 QPI Link Reut 1 (rev 07) 3f:0a.0 System peripheral: Intel Corporation Xeon E5/Core i7 Power Control Unit 0 (rev 07) 3f:0a.1 System peripheral: Intel Corporation Xeon E5/Core i7 Power Control Unit 1 (rev 07) 3f:0a.2 System peripheral: Intel Corporation Xeon E5/Core i7 Power Control Unit 2 (rev 07) 3f:0a.3 System peripheral: Intel Corporation Xeon E5/Core i7 Power Control Unit 3 (rev 07) 3f:0b.0 System peripheral: Intel Corporation Xeon E5/Core i7 Interrupt Control Registers (rev 07) 3f:0b.3 System peripheral: Intel Corporation Xeon E5/Core i7 Semaphore and Scratchpad Configuration Registers (rev 07) 3f:0c.0 System peripheral: Intel Corporation Xeon E5/Core i7 Unicast Register 0 (rev 07) 3f:0c.1 System peripheral: Intel Corporation Xeon E5/Core i7 Unicast Register 0 (rev 07) 3f:0c.2 System peripheral: Intel Corporation Xeon E5/Core i7 Unicast Register 0 (rev 07) 3f:0c.3 System peripheral: Intel Corporation Xeon E5/Core i7 Unicast Register 0 (rev 07) 3f:0c.6 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller System Address Decoder 0 (rev 07) 3f:0c.7 System peripheral: Intel Corporation Xeon E5/Core i7 System Address Decoder (rev 07) 3f:0d.0 System peripheral: Intel Corporation Xeon E5/Core i7 Unicast Register 0 (rev 07) 3f:0d.1 System peripheral: Intel Corporation Xeon E5/Core i7 Unicast Register 0 (rev 07) 3f:0d.2 System peripheral: Intel Corporation Xeon E5/Core i7 Unicast Register 0 (rev 07) 3f:0d.3 System peripheral: Intel Corporation Xeon E5/Core i7 Unicast Register 0 (rev 07) 3f:0d.6 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller System Address Decoder 1 (rev 07) 3f:0e.0 System peripheral: Intel Corporation Xeon E5/Core i7 Processor Home Agent (rev 07) 3f:0e.1 Performance counters: Intel Corporation Xeon E5/Core i7 Processor Home Agent Performance Monitoring (rev 07) 3f:0f.0 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Registers (rev 07) 3f:0f.1 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller RAS Registers (rev 07) 3f:0f.2 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Target Address Decoder 0 (rev 07) 3f:0f.3 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Target Address Decoder 1 (rev 07) 3f:0f.4 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Target Address Decoder 2 (rev 07) 3f:0f.5 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Target Address Decoder 3 (rev 07) 3f:0f.6 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Target Address Decoder 4 (rev 07) 3f:10.0 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Channel 0-3 Thermal Control 0 (rev 07) 3f:10.1 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Channel 0-3 Thermal Control 1 (rev 07) 3f:10.2 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller ERROR Registers 0 (rev 07) 3f:10.3 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller ERROR Registers 1 (rev 07) 3f:10.4 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Channel 0-3 Thermal Control 2 (rev 07) 3f:10.5 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller Channel 0-3 Thermal Control 3 (rev 07) 3f:10.6 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller ERROR Registers 2 (rev 07) 3f:10.7 System peripheral: Intel Corporation Xeon E5/Core i7 Integrated Memory Controller ERROR Registers 3 (rev 07) 3f:11.0 System peripheral: Intel Corporation Xeon E5/Core i7 DDRIO (rev 07) 3f:13.0 System peripheral: Intel Corporation Xeon E5/Core i7 R2PCIe (rev 07) 3f:13.1 Performance counters: Intel Corporation Xeon E5/Core i7 Ring to PCI Express Performance Monitor (rev 07) 3f:13.4 Performance counters: Intel Corporation Xeon E5/Core i7 QuickPath Interconnect Agent Ring Registers (rev 07) 3f:13.5 Performance counters: Intel Corporation Xeon E5/Core i7 Ring to QuickPath Interconnect Link 0 Performance Monitor (rev 07) 3f:13.6 System peripheral: Intel Corporation Xeon E5/Core i7 Ring to QuickPath Interconnect Link 1 Performance Monitor (rev 07)

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[abdnasee]

Hi @jsorg71 Have you managed to dig some result from the given output ? This KDE bar freezing issue is creating lot of hassle in our environment

[jsorg71]

i think this is related to clipboard. If I connect without clipboard I don't see the freeze. There used to be an app called klipper in KDE what could cause trouble but I don't see that in KDE 5.

[cuyo]

I think it is related to xrdp-chansrv. If I do sudo umount -f xrdp-chansrv and sudo killall xrdp-chansrv, then the bar and overall desktop become responsive.

It seems that xrdp-chansrv is crashing and is causing IO problems as shared-drives where xrdp-chansrv is mounted is located in root of home folder.

I haven't been able to find the root cause for this. It works well in the quick create Ubuntu 18.04 image. I thought it was isolated to KDE and related to how they handle fuse filesystems (no gvfs) but I tried with XFCE and it experiences the same freezes.

[jsorg71]

The clipboard is in chansrv. Can you try connect with clipboard turned off and see if freeze happens?

[cuyo]

You are right, if I disable clipboard then the crash doesn't happen. If I enable both clipboard and shared drives, then I can reproduce the crash every time I go to my share-drive and click copy on any file. This causes xrdp-chansrv to crash which is the reason for the freeze. I'm currently testing in XFCE but I suspect is similar reason for KDE.

Log of xrdp-chansrv when reproducing the issue with xrdp 0.9.10: [20191009-20:24:13] [INFO ] Socket 12: AF_UNIX connection received [20191009-20:24:14] [INFO ] term_signal_handler: got signal 15 [20191009-20:24:14] [INFO ] xserver_fatal_handler: entered.......

[tiago-as]

Hi, I have the same issue and yes, disabling the clipboard channel fixes it. Although, I was already working on a workaround because I was not aware of the clipboard channel situation. So I guess I can contribute with a workaround for who needs the clipboard channel activated. Just add this code to the /etc/xrdp/reconnectwm.sh file:

#!/bin/bash

MYUSER=`whoami`
MYENV=/tmp/$MYUSER/myenv

function restart_plasma() {

    pkill -u $MYUSER plasmashell  >& /dev/null

    MYPROC=`pgrep -u $MYUSER kwin_x11` 
    cat /proc/$MYPROC/environ | tr \\0 \\n > $MYENV
    set -a
    . $MYENV
    kstart5 plasmashell >& /dev/null

    # sleep to give time to plasma to recover
    sleep 2
}

# we need to kill plasma every time because it freezes on reconnect for some reason
restart_plasma | zenity --progress --no-cancel --title RDP --text "Restoring session" --auto-close

You can remove the zenity part if you want, which is a nice to have: Informing the user that something is happening. If you desire to keep it just install zenity via you favorite package manager.

DISCLAIMER: This code was implemented and tested in Kubuntu 20.04 so I cannot guarantee it will work on 100% of Linux systems but I'd say that it will cover most of Debian based OS running KDE.