After disconnect, physical screen always stays black

Forums / NoMachine for Linux / After disconnect, physical screen always stays black

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  • #9052
    loginatnine
    Participant

    Hi!

    I’m using NoMachine 5.0.47 with the option “Lock the physical screen when somebody connects”. This works fine but when I get back at work to use my desktop again, the screen is blacked out and I can’t do anything with it, even changing terminal with ctrl+alt+F5 doesn’t work. It seems like my desktop is doing something (the screen flickers) but it always stays black and I can’t do anything. The only solution is ssh and reboot or a force reboot with the power button.

    I tried disconnecting gracefully with the client, same thing.

    I can reconnect with the client fine but the screen will always stay black on my physical desktop.

    Any ideas?

    Thanks

    #9056
    Britgirl
    Keymaster

    What Linux distribution and version are you using on the PC at work (the server)? Client OS which initiates the connection ? – useful to know for replication during investigation.

    #9057
    loginatnine
    Participant

    Oups sorry I was sure I mentioned this.

    Desktop at work -> Linux Mint 17.1 Rebecca

    Client used to connect -> NoMachine 5.0.47 on Windows 7

    #9058
    loginatnine
    Participant

    The server is also using NoMachine 5.0.47

    #9106
    fra81
    Moderator

    Hi!

    Unfortunately we weren’t able to reproduce your issue in our labs with the same desktop environment. Are you sure that there are no NoMachine connections left at the moment of the black screen (e.g. you had connected from home and forgot to close the connection before going to work)?

    More info about the hardware could help us match your environment more closely, mainly about graphics card and drivers.

    #9107
    loginatnine
    Participant

    Yes I am absolutely sure about the connections. Actually, I even tried to restart nxserver by ssh’ing into my box without success. Can I help you out with some logs maybe? Here is some info about my desktop :

    sudo lshw –short

    H/W path        Device      Class          Description

    ======================================================

    system         30A1002PCA (LENOVO_MT_30A1)

    /0                          bus            SHARKBAY

    /0/0                        memory         64KiB BIOS

    /0/3d                       processor      Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz

    /0/3d/3e                    memory         1MiB L2 cache

    /0/3d/3f                    memory         256KiB L1 cache

    /0/3d/40                    memory         8MiB L3 cache

    /0/41                       memory         32GiB System Memory

    /0/41/0                     memory         8GiB DIMM DDR3 Synchronous 1600 MHz (0.6 ns)

    /0/41/1                     memory         8GiB DIMM DDR3 Synchronous 1600 MHz (0.6 ns)

    /0/41/2                     memory         8GiB DIMM DDR3 Synchronous 1600 MHz (0.6 ns)

    /0/41/3                     memory         8GiB DIMM DDR3 Synchronous 1600 MHz (0.6 ns)

    /0/100                      bridge         4th Gen Core Processor DRAM Controller

    /0/100/2                    display        Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller

    /0/100/3                    multimedia     Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller

    /0/100/14                   bus            8 Series/C220 Series Chipset Family USB xHCI

    /0/100/16                   communication  8 Series/C220 Series Chipset Family MEI Controller #1

    /0/100/16.3                 communication  8 Series/C220 Series Chipset Family KT Controller

    /0/100/19       eth0        network        Ethernet Connection I217-LM

    /0/100/1a                   bus            8 Series/C220 Series Chipset Family USB EHCI #2

    /0/100/1b                   multimedia     8 Series/C220 Series Chipset High Definition Audio Controller

    /0/100/1c                   bridge         8 Series/C220 Series Chipset Family PCI Express Root Port #1

    /0/100/1c.3                 bridge         8 Series/C220 Series Chipset Family PCI Express Root Port #4

    /0/100/1c.3/0               bridge         Integrated Technology Express, Inc.

    /0/100/1d                   bus            8 Series/C220 Series Chipset Family USB EHCI #1

    /0/100/1f                   bridge         C226 Series Chipset Family Server Advanced SKU LPC Controller

    /0/100/1f.2                 storage        82801 SATA Controller [RAID mode]

    /0/100/1f.3                 bus            8 Series/C220 Series Chipset Family SMBus Controller

    /0/1            scsi0       storage

    /0/1/0.0.0      /dev/cdrom  disk           DVD-RAM SW830

    /0/2            scsi1       storage

    /0/2/0.0.0      /dev/sda    disk           480GB INTEL SSDSC2BW48

    /0/2/0.0.0/1    /dev/sda1   volume         288GiB Windows NTFS volume

    /0/2/0.0.0/2    /dev/sda2   volume         158GiB Extended partition

    /0/2/0.0.0/2/5  /dev/sda5   volume         126GiB Linux filesystem partition

    /0/2/0.0.0/2/6  /dev/sda6   volume         31GiB Linux swap / Solaris partition

    /0/3            scsi2       storage

    /0/3/0.0.0      /dev/sdb    disk           1TB WDC WD1000DHTZ-0

    /0/3/0.0.0/1                volume         931GiB Windows NTFS volume

    /0/4            scsi4       storage

    /0/4/0.0.0      /dev/sdc    disk           1TB WDC WD1000DHTZ-0

    /0/4/0.0.0/1                volume         931GiB Windows NTFS volume

    /0/5            scsi5       storage

    /0/5/0.0.0      /dev/sdd    disk           SCSI Disk

    /0/5/0.0.1      /dev/sde    disk           SCSI Disk

    /0/5/0.0.2      /dev/sdf    disk           SCSI Disk

    /0/5/0.0.3      /dev/sdg    disk           M.S./M.S.Pro/HG

    /0/5/0.0.3/0    /dev/sdg    disk

    /0/5/0.0.4      /dev/sdh    disk           SCSI Disk

    /1                          power          To Be Filled By O.E.M.

     

    #9114
    fra81
    Moderator

    Would you help us debugging this issue by running a debug library? In this case, please contact us to forum[at]nomachine[dot]com so we can send you the library and instructions.

    #9118
    loginatnine
    Participant

    With pleasure, email sent!

    #9131
    Britgirl
    Keymaster

    We will be sending you an email soon with further instructions.

    #9184
    Britgirl
    Keymaster

    Thanks for the additional information that you submitted with the logs. We have found out what the problem is and one of our developers will update the topic soon. Can you update the forum post with what you wrote in your email? 🙂

    #9198
    loginatnine
    Participant

    Sure, thx for the support!

    Here’s what I wrote in the email, I’ve narrowed the bug down while reproducing it with the debug library:

    My work computer (nomachine server) has 2 physical screens. My home computer (nomachine client) has 1 physical screen. Therefore, each time I remote desktop to my work computer, I hit the display options of linux mint to disable the second screen so everything is rendered properly. This is what triggers the bug. After doing this, even with restoring the 2 screens before disconnecting, I hit the bug.

    If I don’t change the display options, everything works properly.

    #9365
    loginatnine
    Participant

    Any update on this? Thx!

    #9370
    Britgirl
    Keymaster

    Hi, we have a patch. Are you interested in testing?

    #9371
    loginatnine
    Participant

    Definitely, send it my way anytime you want!

    #9429
    Britgirl
    Keymaster

    Hi, we’ve emailed you further instructions. Have you received it?

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