Installing XRDP with update for Larger Monitors

Option 1a: Configure the TCP send buffer size

• Edit the file /etc/xrdp/xrdp.ini

• Locate the line that reads "tcp_send_buffer_bytes". Remove the comment character ("#").

• Edit the value so it now reads: 

tcp_send_buffer_bytes=4194304

• Restart the service:

# systemctl restart xrdp

Option 1b: Configure the kernel network buffer size

• Change the current network buffer size to a larger value with the following command:

sysctl -w net.core.wmem_max=8388608

• Create a new file /etc/sysctl.d/xrdp.conf with the following content:

net.core.wmem_max = 8388608

This will ensure that the value is properly set between reboots. 

Source: Link

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I followed the 2nd option and I have a 35in samsung wide screen monitor.  It would lock up and randomly come back.  User FitAward_6935 goes on to explain that larger monitors now require a higher tcp send buffer.  There is too much fragmentation over the xrdp protocol which then slows the performance.