Performance with Rocky Linux Host is extremely slow

[rocky9_nomchine]

Hello,

I am able to make a successful connection from Windows 11 to Rocky Linux Remote Host.

However, the performance is very poor, there is a few second delays between input actions.

After the connection is established, the remote host (local input) also becomes very unresponsive with a few seconds delay.

Both Windows 11 and Rocky Linux are running NoMachine 9.3.7, and both machines are on the same network.

As a comparison, I tried with two different Windows 11 client, same result.

But connection between two Windows machine is good, also connecting to Windows Host from Rocky Client is also good.

 

In summary:

Rocky Linux Remote Host – Windows Client (bad performance, very laggy)

Windows 11 Remote Host – Windows 11 Client (Good performance)

Windows 11 Remote Host – Rocky Linux Client (Good performance)

Affected Nomachine ver: 9.3.7

Attached log is taken fro Windows 11 Client when connected to Rocky Host.

 

Attachments:

1. Selenium-RedHat-logs-2026-01-05-16.03.31.zip

[Britgirl]

Hi, thanks for the client side logs. Can you send us the logs from the server as well? You can get them through the UI on the Rocky server: Settings > Server > Security > Take logs, reproduce the problem first and then click Take logs.

[rocky9_nomchine]

Sure, here it is (I had to do a logrotate to cut down on log size.)

Attachments:

1. Server-logs-2026-01-07-14.08.04.zip

[Britgirl]

Can you try disabling EGL capture? From a terminal run:

sudo /usr/NX/bin/nxserver --eglcapture no

[rocky9_nomchine]

Disabling egl did not help.

I also tried playing around with Server Performance setting on the Linux host.

Default settings are:

• unchecked – Use a specific display encoding
• checked – use hardware encoding
• unchecked – Use a specific display frame rate
• checked – Use acceleration for display processing.

I tried disabling hardware encoding, and acceleration for display processing, enabling specific display encoding (VP8, MPEG, H.264), using a specific display frame rate (30FPS), none of it did any improvement.

I have attached the server side logs that include all the activities above.

The logs had to be split to meet the 1024kb requirement, and I added .zip to the z01, z02, or else the forum won’t let me upload them.

You will have to rename them before combing:
Server logs 2026-01-08 12.36.08.z01.zip -> need to be renamed as: Server logs 2026-01-08 12.36.08.z01
Server logs 2026-01-08 12.36.08.z02.zip -> need to be renamed as: Server logs 2026-01-08 12.36.08.z02
Server logs 2026-01-08 12.36.08.zip -> does not need to be renamed.

Then combine with $zip -FF ‘Server logs 2026-01-08 12.36.08.zip’ –out full.zip“

Attachments:

1. Server-logs-2026-01-08-12.36.08-1.zip
2. Server-logs-2026-01-08-12.36.08.z01.zip
3. Server-logs-2026-01-08-12.36.08.z02.zip

[Britgirl]

My bad. I should have mentioned that after disabling egl you should logout and log back in or reboot the system. Please try that if you didn’t do that already.

[rocky9_nomchine]

AH yes, after  sudo /usr/NX/bin/nxserver --eglcapture no
follow by a reboot, the performance issue appears to go away.

 

[rocky9_nomchine]

There is a no problem with sudo /usr/NX/bin/nxserver --eglcapture no.
I use dual monitor setup on Rocky Linux, with eglcapture disabled, I lose the ability to select which monitor to display. Instead, both displays are showing, and I can choose either scale both to the client monitor size, or “enable view point mode”.

I have not yet tried resizing the remote display.

[Britgirl]

Can you submit new logs?

[rocky9_nomchine]

Please see the attached.
Service side debug level log during remote control with –eglcapture set to no.

Attachments:

1. Server-logs-2026-01-14-16.25.26.zip

[Britgirl]

Can you provide the output of the following commands?

gdbus call --session --dest org.gnome.Mutter.DisplayConfig --object-path /org/gnome/Mutter/DisplayConfig --method org.gnome.Mutter.DisplayConfig.GetCurrentState

gdbus call --session --dest org.gnome.Mutter.DisplayConfig --object-path /org/gnome/Mutter/DisplayConfig --method org.gnome.Mutter.DisplayConfig.GetResources

[rocky9_nomchine]

Here it is:

gdbus call --session --dest org.gnome.Mutter.DisplayConfig --object-path /org/gnome/Mutter/DisplayConfig --method org.gnome.Mutter.DisplayConfig.GetResources
(uint32 1, [(uint32 0, int64 43, 1920, 0, 1600, 1200, 48, uint32 0, [uint32 0, 1, 2, 3, 4, 5, 6, 7], @a{sv} {}), (1, 45, 0, 0, 1920, 1080, 55, 0, [0, 1, 2, 3, 4, 5, 6, 7], {}), (2, 47, 0, 0, 0, 0, -1, 0, [0, 1, 2, 3, 4, 5, 6, 7], {}), (3, 49, 0, 0, 0, 0, -1, 0, [0, 1, 2, 3, 4, 5, 6, 7], {})], [(uint32 0, int64 4294967347, 0, [uint32 0, 1, 2, 3], 'DP-1', [uint32 48, 52, 27, 40, 31, 28, 21, 45, 47, 46, 56, 54, 36, 10, 34, 8, 57, 1, 17, 38, 29, 18, 9], @au [], {'vendor': <'DEL'>, 'product': <'DELL 2007FP'>, 'serial': <'C953665T311S'>, 'width-mm': <410>, 'height-mm': <310>, 'display-name': <'DP-1'>, 'backlight': <-1>, 'min-backlight-step': <-1>, 'primary': , 'presentation': , 'connector-type': <'DisplayPort'>, 'underscanning': , 'supports-underscanning': , 'supports-color-transform': , 'edid': <[byte 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x10, 0xac, 0x21, 0xa0, 0x53, 0x31, 0x31, 0x33, 0x16, 0x10, 0x01, 0x03, 0x80, 0x29, 0x1f, 0x78, 0xee, 0xee, 0x91, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xa5, 0x4b, 0x00, 0x81, 0x80, 0xa9, 0x40, 0x71, 0x4f, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x48, 0x3f, 0x40, 0x30, 0x62, 0xb0, 0x32, 0x40, 0x40, 0xc0, 0x13, 0x00, 0x6f, 0x13, 0x11, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xff, 0x00, 0x43, 0x39, 0x35, 0x33, 0x36, 0x36, 0x35, 0x54, 0x33, 0x31, 0x31, 0x53, 0x0a, 0x00, 0x00, 0x00, 0xfc, 0x00, 0x44, 0x45, 0x4c, 0x4c, 0x20, 0x32, 0x30, 0x30, 0x37, 0x46, 0x50, 0x0a, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x38, 0x4c, 0x1e, 0x53, 0x11, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00, 0xd5]>}), (1, 4294967349, 1, [0, 1, 2, 3], 'DVI-I-1', [55, 50, 22, 27, 40, 31, 28, 21, 45, 47, 46, 56, 54, 36, 10, 34, 8, 57, 1, 17, 38, 29, 18, 9], [], {'vendor': <'DEL'>, 'product': <'DELL P2310H'>, 'serial': <'N918R0170P2S'>, 'width-mm': <510>, 'height-mm': <290>, 'display-name': <'DVI-I-1'>, 'backlight': <-1>, 'min-backlight-step': <-1>, 'primary': , 'presentation': , 'connector-type': <'DVII'>, 'underscanning': , 'supports-underscanning': , 'supports-color-transform': , 'edid': <[byte 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x10, 0xac, 0x28, 0xd0, 0x53, 0x32, 0x50, 0x30, 0x01, 0x14, 0x01, 0x03, 0x80, 0x33, 0x1d, 0x78, 0x2e, 0xee, 0x95, 0xa3, 0x54, 0x4c, 0x99, 0x26, 0x0f, 0x50, 0x54, 0xa5, 0x4b, 0x00, 0x71, 0x4f, 0x81, 0x80, 0xd1, 0xc0, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x3a, 0x80, 0x18, 0x71, 0x38, 0x2d, 0x40, 0x58, 0x2c, 0x45, 0x00, 0xfd, 0x1e, 0x11, 0x00, 0x00, 0x1e, 0x00, 0x00, 0x00, 0xff, 0x00, 0x4e, 0x39, 0x31, 0x38, 0x52, 0x30, 0x31, 0x37, 0x30, 0x50, 0x32, 0x53, 0x0a, 0x00, 0x00, 0x00, 0xfc, 0x00, 0x44, 0x45, 0x4c, 0x4c, 0x20, 0x50, 0x32, 0x33, 0x31, 0x30, 0x48, 0x0a, 0x20, 0x00, 0x00, 0x00, 0xfd, 0x00, 0x38, 0x4c, 0x1e, 0x53, 0x11, 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00, 0xc3]>})], [(uint32 0, int64 0, uint32 1536, uint32 2048, 59.953784942626953, uint32 9), (1, 1, 800, 600, 75.0, 5), (2, 2, 2048, 1152, 59.903182983398438, 6), (3, 3, 5120, 2880, 59.987163543701172, 6), (4, 4, 1152, 2048, 59.903182983398438, 9), (5, 5, 960, 1280, 59.939048767089844, 9), (6, 6, 2048, 1536, 59.953784942626953, 6), (7, 7, 1620, 2880, 59.960258483886719, 9), (8, 8, 1024, 768, 60.003841400146484, 10), (9, 9, 640, 480, 59.940475463867188, 10), (10, 10, 1152, 864, 59.958633422851562, 6), (11, 11, 768, 1024, 59.920131683349609, 9), (12, 12, 800, 1280, 59.810325622558594, 9), (13, 13, 900, 1600, 59.946022033691406, 9), (14, 14, 1080, 1440, 59.988838195800781, 9), (15, 15, 1050, 1680, 59.954250335693359, 9), (16, 16, 1920, 1440, 59.967990875244141, 6), (17, 17, 800, 600, 60.316539764404297, 5), (18, 18, 640, 480, 75.0, 10), (19, 19, 1080, 1920, 59.962844848632812, 9), (20, 20, 2880, 5120, 59.987163543701172, 9), (21, 21, 1368, 768, 59.882049560546875, 6), (22, 22, 1680, 1050, 59.954250335693359, 6), (23, 23, 1050, 1400, 59.978443145751953, 9), (24, 24, 1920, 1200, 59.884601593017578, 6), (25, 25, 864, 1152, 59.958633422851562, 9), (26, 26, 3200, 1800, 59.956130981445312, 6), (27, 27, 1600, 900, 59.946022033691406, 6), (28, 28, 1400, 1050, 59.978443145751953, 6), (29, 29, 720, 400, 70.0816650390625, 6), (30, 30, 1800, 3200, 59.956130981445312, 9), (31, 31, 1440, 900, 59.887443542480469, 6), (32, 32, 1440, 1920, 59.967990875244141, 9), (33, 33, 4096, 2304, 59.989021301269531, 6), (34, 34, 1024, 768, 75.028579711914062, 5), (35, 35, 1200, 1920, 59.884601593017578, 9), (36, 36, 1152, 864, 75.0, 5), (37, 37, 720, 1280, 59.855125427246094, 9), (38, 38, 800, 600, 59.861404418945312, 6), (39, 39, 1600, 2560, 59.986587524414062, 9), (40, 40, 1440, 1080, 59.988838195800781, 6), (41, 41, 2880, 1620, 59.960258483886719, 6), (42, 42, 900, 1440, 59.887443542480469, 9), (43, 43, 2560, 1600, 59.986587524414062, 6), (44, 44, 2160, 3840, 59.980926513671875, 9), (45, 45, 1280, 1024, 75.024673461914062, 5), (46, 46, 1280, 960, 59.939048767089844, 6), (47, 47, 1280, 1024, 60.019741058349609, 5), (48, 48, 1600, 1200, 60.0, 5), (49, 49, 1200, 1600, 59.869106292724609, 9), (50, 50, 1920, 1080, 59.962844848632812, 6), (51, 51, 768, 1368, 59.882049560546875, 9), (52, 52, 1600, 1200, 59.869106292724609, 6), (53, 53, 2560, 1440, 59.960628509521484, 6), (54, 54, 1280, 720, 59.855125427246094, 6), (55, 55, 1920, 1080, 60.0, 5), (56, 56, 1280, 800, 59.810325622558594, 6), (57, 57, 1024, 768, 59.920131683349609, 6), (58, 58, 600, 800, 59.861404418945312, 9), (59, 59, 3840, 2160, 59.980926513671875, 6), (60, 60, 1440, 2560, 59.960628509521484, 9), (61, 61, 2304, 4096, 59.989021301269531, 9)], 65535, 65535)

[Britgirl]

We’d like to send you a debug package which will allow us to extract more detailed logs. If you’re interested, let us know and we’ll send you further instructions.

[Author]

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