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Ticket Resolution Summary Owner Reporter
#7312 duplicate jumbled audio 4sound
Description

All audio output is jumbled since virtualbox 3.2.8 release As a example I've recorded windows startup sound(sorry for poor volume). it seems that people are experiencing the same problem on mac http://forums.virtualbox.org/viewtopic.php?f=8&t=33537&p=150625#p150625

#18972 fixed Application windows disappear when switching to Seamless Mode 4til7
Description

When I switch to seamless mode, all application windows disappear. Problem experienced under 6.02. Upgraded to 6.12. The problem still exists.

This may be an ongoing issue. A search of bug track found reports of seamless mode not working (or not working well, e.g. https://www.virtualbox.org/ticket/15318). The ones reviewed were not specific about the issues experienced.

Ubuntu 18.04

#6586 obsolete linux loopback mounted disk image != actual hard disk image (linux loop devices) 6502cpu
Description

I use loopback devices to create disk image files for development (/dev/loop0 for example). If I create a _filesystem_ only on my loop device, virtualbox can boot from it. For example:

dd if=/dev/zero of=diskimage bs=1M count=128 losetup /dev/loop0 mkfs.msdos /dev/loop0 syslinux -s /dev/loop0

(assuming you have a virtualbox disk image file describing loop0).

If I instead however, create a _partiton_, with a filesystem on the partition, I cannot boot for some reason. For example, I would use this process to create a compact flash which I could then boot from either in a real device or with QEMU:

dd if=/dev/zero of=/dev/sdc bs=1M count=128 fdisk /dev/sdc (create a single partition, sdc1, msdos fat16) mkfs.msdos /dev/sdc1 syslinux -s /dev/sdc1

if I use: dd if=/dev/sdc bs=1M of=myimage and then losetup /dev/loop0 myimage

and boot virtualbox with that loopdevice .vdi, it doesn't boot. BUT, qemu has no trouble:

qemu -hda myimage /dev/zero

This small size disk does have 32/sectors per track and not 63 that most others have. Otherwise I can't see how it would be choking since virtualbox otherwise should be insensitive to the 'type' of device (/dev/sd instead of /dev/loop).

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