VirtualBox

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Ticket Resolution Summary Owner Reporter
#10377 obsolete x86 debug registers don't work reliably in a guest OS Eugene153
Description

Some of x86 debug register events appears lost and not delivered to a guest OS.

To reproduce: Use gdb on a Linux guest to run a simple program like this:

#include <stdio.h>
int main(int argc, char ** argv) {
   char ch = 0;
   for (;;) {
      ch = ch + 1;
      printf("%d\n", ch);
   }
   return 0;
}

set a hardware breakpoint:

(gdb) watch ch
Hardware watchpoint 2: ch
(gdb)

do cont until the breakpoint fails to trigger, e.g.:

(gdb) cont
Continuing.
111
112
Hardware watchpoint 2: ch

Old value = 111 'o'
New value = 113 'q'
main (argc=1, argv=0x7fffffffe638) at t.c:8
8             printf("%d\n", ch);
(gdb)

in this case writing 112 to ch did not trigger the breakpoint.

The problem appears reproducible with any host, guest or debugger.

#1226 fixed x64 Vista host BSD when connecting USB Wi-Fi adapter to WinXP SP2 guest Alexander Nalunin
Description

I have Windows Vista Business (Aero enabled) x64 installed as HOST (With updates til Feb 08), Intel Core 2 Quad 6400, 4GB RAM. VirtualBox 1.5.6 x64 installed. Guest OS: Windows XP Service Pack 2 + Updates

When connecting my USB Wi-Fi adapter (D-Link DWL-G122 HW:C1) while guest OS is active gives Blue Screen of Death (formely BSD) on the host (Vista) OS.

I'm able to reproduce a problem 2 times. It's happends after I connect my USB adapter while Guest OS is in focus.

#6004 worksforme x64 Guest will not run on Windows 7 x64 -> HP BIOS bug Christopher
Description

I am running Windows 7 Enterprise x64 (Fresh install, no other virtualization products installed) on a Core2quad Q6600, 8 GB RAM

VirtualBox will not detect VT-x extensions, although they are enabled (I dual boot the system with Windows Hyper-V Server 2008 R2 without any problems running 64-bit guests)

VirtualBox reports

"VirtualBox - Error | VT-x/AMD-V hardware acceleration has been enabled, but is not operational. Your 64-bit guest will fail to detect a 64-bit CPU and will not be able to boot. Please ensure that you have enabled VT-x/AMD-V properly in the BIOS of your host computer."

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