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Ticket Resolution Summary Owner Reporter
#1185 duplicate TwinView and Seamless mode don't play nice -> duplicate of #2720 Alan Burlison
Description

Host OS: Solaris Nevada build 82
Guest OS: Windows XP SP2 + all current updates, Guest Additions installed

I have a TwinView setup with two monitors, using an Nvidia card. If I switch to seamless mode, any virtualbox windows on the second monitor disappear entirely - ones on the first monitor are fine. And if I drag a seamless-mode window so it straddles both the first and second monitors. the portion on the second monitor isn't shown.

Also, when I'm not in seamless mode, if I attempt to resize the virtualbox guest window so it straddles both monitors it won't resize any bigger than the size of an individual monitor.

#1186 fixed Windows Friert ein Spooky
Description

ich hab debian drauf als host os und als guest os win xp das stürzt nach kurzer zeit ab also es friert ein hier ist mal das log file www.gothtown.de/GothTown-2008-02-13-00-41-41.log ... auch nochma im anhang 1.5.4r27034 << das is die version . /usr/lib/virtualbox/VirtualBox Xlib: extension "XInputExtension" missing on display ":1.0". Qt WARNING: Failed to get list of devices das kommt immer in der console während virtualbox läuft

#1187 fixed Cannot write more than 1023 bytes at once on shared drive via C++ ofstream => Fixed in SVN Dirk Farin
Description

I have a strange behaviour when writing files to shared folders on the host system. The configuration is: host: Windows-XP guest: Linux, Debian, 2.6.22 (lenny / testing) gcc on guest: 4.2.3

When using this simple test program, compiled on the guest linux system:


#include <iostream> #include <iomanip> #include <fstream>

int main(int argc, char *argv[]) {

char buf[5000];

for (int i=0;i<5000;i++) buf[i]=1;

std::ofstream os("out", std::ios::binary | std::ios::out); os.write(buf, 1024);

os << "end" << std::endl;

}


The program writes only 'zeros' instead of 'ones' when the output is a shared host folder (ntfs, mount options: "rw,exec,suid,dev"). This happens when the number of bytes written is >=1024. For chunks smaller than 1023, it works ok. It also works ok, if the output is on the guest file-system.

If the last line is removed (the file output is not flushed), no output is written at all (zero-length file). The ios::bad flag is not set after writing, claiming that everything went ok.

Replacing the ofstream output with fwrite-based code works ok for all sizes.

Not sure, if this is a stdc++ problem or a VirtualBox problem, but since the problem occurs with several gcc versions and only appears when writing to the host filesystem, it seems to be related to VirtualBox.

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