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Ticket Resolution Summary Owner Reporter
#14047 duplicate chromium browser version 41.x -> duplicate of #13984 Gerry73
Description

I'm using virtual box 4.3.26. I have a vm with xubuntu 14.04.2 LTS. I have installed chromium: until version 40.x it works fine. If I update to newer version (exactly 41.0.2272.76 ubuntu 14.04 64bit), chromium stop to work properly. For example, if i try to change order of tabs it doesn't works. If I open developer tools (with ctrl+shift+i) I can't resize area. Before upgrading to version 41.x of chromium everything works properly. I also had the same problems with the version 4.3.12 of virtualbox.

#11154 duplicate Bad VM to Host Network Performance with Intel NIC or virtio Gevatter Gaul
Description

I'm running VirtualBox 4.2 on a Ubuntu 12.04 LTS 64bit. The machine is a Xeon E1230 Quadcore with 32G ECC RAM. The VM, running Ubuntu 12.04 LTS 64bit, is connected via a Host Adapter. When running a ping from the Host to the VM, everything seems fine and I get an average latency of around 0.2ms. But in the other direction, depending on the configured VM NIC, I get very high ping results. Strangely enough, the problem only exists, when configuring more than one virtual CPU. Here are my measurements:

Average Ping:

VCPUs PCnet-PCI II PCnet-FAST III Intel PRO/1000 MT Desktop Intel PRO/1000 T Server Intel PRO/1000 MT Server Paravirtualized Network 1 0.168 0.183 0.209 0.191 0.206 0.399 2 0.193 0.182 15.987 12.157 10.349 5.327 3 0.179 0.167 12.032 14.052 9.657 5.337 4 0.174 0.176 12.929 13.680 13.627 5.482

mdev:

VCPUs PCnet-PCI II PCnet-FAST III Intel PRO/1000 MT Desktop Intel PRO/1000 T Server Intel PRO/1000 MT Server Paravirtualized Network 1 0.043 0.046 0.040 0.061 0.039 0.055 2 0.085 0.085 16.036 16.390 14.946 4.638 3 0.045 0.046 14.575 16.903 13.330 5.252 4 0.045 0.044 16.286 16.033 16.148 4.881

We see, as soon as I configure more than one VCPU, latency goes through the roof.

vbox guest log and showvminfo output are attached.

#17866 invalid Serial Port/UART cannot be used GhostGambler
Description

I want to use the UART functionality to communicate with the VM (in this example Linux) from macOS.

As configuration I used --uart2 0x2f8 3 and --uartmode2 file /tmp/serial_port2.

The Linux guest says everything is fine:

$ dmesg | grep tty
[    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.15.0-23-generic root=LABEL=cloudimg-rootfs ro console=tty1 console=ttyS0
[    0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.15.0-23-generic root=LABEL=cloudimg-rootfs ro console=tty1 console=ttyS0
[    0.004000] console [tty1] enabled
[    0.004000] console [ttyS0] enabled
[    1.535605] 00:02: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
[    1.721594] 00:03: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A

The file /tmp/serial_port2 is created on the macOS file system, but when I want to access it with cat or screen, nothing happens. The commands just exit immediately:

$ screen /tmp/serial_port2 115200
[screen is terminating]
$ cat serial_port2 
$ 

If I run the command as root, screen starts and shows the message

Cannot exec 'serial_port2': No such file or directory  

If I instead use --uartmode2 tcpserver 8081, I can use nc 127.0.0.1 8081 and I receive data from the VM as expected.

I also created another VM with uartmode=client, but they also cannot communicate with each other.

Is this function not working, or am I doing something wrong?

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