I downgraded and have postive results. Currently installed: virtualbox 4.2.18-1 virtualbox-guest-iso 4.2.18-1 virtualbox-host-modules 4.2.18-7 linux 3.11.6-1 No USB read/write problems any more. I still get Malformed Packet in Wireshark, but this seems unrelated. However now I receive crashes of my VM when attaching/detaching USB devices to my VM often. Guess I have to live with that. Am 03.09.2014 um 12:54 schrieb Peter Bauer: > Hi, > > I have also issues with USB devices on Windows 7 32Bit guest. The > devices I use are mainly USB Serial COM ports. On top of that a > proprietary binary protocol is used. > > The applications that communicate with the USB Serial COM ports are > constantly having problems reading and writing data. > > Installed: > virtualbox 4.3.14-3 > virtualbox-guest-iso 4.3.14-1 > virtualbox-guest-modules 4.3.14-5 > virtualbox-host-modules 4.3.14-5 > Linux localhost 3.16.1-1-ARCH #1 SMP PREEMPT Thu Aug 14 07:40:19 CEST > 2014 x86_64 GNU/Linux > > Extension Pack 4.3.14r95030 > > With usbmon and wireshark I could see a lot of malformed USB packets. > I'm afraid I don't know enough to make an exact conclusion whats wrong > in detail. > > I will try a downgrad from 4.3.14-3 to 4.3.12 and report again. > > > > > Am 04.08.2014 um 22:05 schrieb Ralf Mardorf: >> On Mon, 2014-08-04 at 20:15 +0100, Marco Monteiro wrote: >>> I have experienced problems with USB also. My guest is Windows 8.1. >>> When I try to access the USB device from Windows, the access fails >>> and then everything inside the VM seems to start misbehaving. I cannot >>> properly shutdown the VM - I have to kill the VBox process. >> >> Hi Marco, >> >> when the USB data transfer paused, the graphic performance and access to >> the VDI drive slowed down, for iTunes and other apps running on the XP >> guest. Performance for iTunes always is bad, but other apps usually run >> without issues. I always could shut down Windows, but sometimes much >> time was needed before I could use the menu. If you can't shutdown your >> guest, you could try to shut down the virtual machine by closing the >> VBox window, instead off killing the process. >> >> I add an additional comment to my bug report. >> >> "There isn't an issue for the USB mouse, but data transfer between VBox >> and an iPad2 is broken when I use 4.3.14. There aren't issues anymore, >> after I downgraded all packages to 4.3.12. The whole performance of Vbox >> is slower when syncing iTunes and an iPad with .14 and there are many >> unknown errors and timeouts, if you e.g. try to install 20 applications >> or more from iTunes running on the VBox guest to an iPad. Disconnecting >> the iPad's USB causes VBox to crash, if it is done without unchecking >> the iPad in VBox's devices menu, this doesn't happen when using .12. >> >> The used packages are virtualbox, virtualbox-host-dkms, >> virtualbox-extension-pack and I install the guest additions that fit to >> the installed version of virtualbox. Perhaps the culprit isn't the >> package virtualbox, it might be the package virtualbox-extension-pack, >> since it's needed for USB2 support." - >> https://bugs.archlinux.org/task/41424 >> >> JFTR everything already was ok, when I only downgraded the package >> virtualbox, disabled USB2 support and kept the 4.3.14 guest additions. >> In the mean time I downgraded all packages and add the 4.3.12 guest >> additions, so with the outdated version I now can use USB2 again. >> >> Perhaps you have the time confirm my bug report. >> >> Regards, >> Ralf >> >
