I installed the Parallels Hypervisor 2.1 build 1670 under Suse 10.0 with WinXPsp1 as guest operating system. So far I have two problems. 1. When starting the VM, I get the following error: Parallels Workstation encountered a problem with the /dev/rtc device. This may be caused by one of the following reasons: (1) you do not have proper system permissions, (2) the device is not found in your host PC, (3) the device is used by another process. The absence of /dev/rtc device may downgrade VM performance and make internal timers slow. linux:~ # dmesg |grep -i real Real Time Clock Driver v1.12 linux:~ # zcat /proc/config.gz |grep -i rtc # CONFIG_APM_RTC_IS_GMT is not set CONFIG_RTC=y # CONFIG_HPET_RTC_IRQ is not set CONFIG_SENSORS_RTC8564=m CONFIG_SND_RTCTIMER=m linux:~ # hwclock --debug --show hwclock from util-linux-2.12q Using /dev/rtc interface to clock. Last drift adjustment done at 1144781683 seconds after 1969 Last calibration done at 1144781683 seconds after 1969 Hardware clock is on UTC time Assuming hardware clock is kept in UTC time. Waiting for clock tick... ...got clock tick Time read from Hardware Clock: 2006/04/11 19:39:50 Hw clock time : 2006/04/11 19:39:50 = 1144784390 seconds since 1969 Tue Apr 11 12:39:50 2006 -0.045644 seconds linux:~ # cat /proc/interrupts CPU0 0: 755762 XT-PIC timer 1: 16 XT-PIC i8042 2: 0 XT-PIC cascade 5: 401 XT-PIC Intel 82801DB-ICH4 7: 3 XT-PIC parport0 8: 3 XT-PIC rtc 9: 3 XT-PIC acpi 11: 410996 XT-PIC uhci_hcd:usb1, uhci_hcd:usb2, uhci_hcd:usb3, ehci_hcd:usb4, yenta, ohci1394, eth0, nvidia 12: 114 XT-PIC i8042 14: 40071 XT-PIC ide0 15: 25354 XT-PIC ide1 NMI: 0 LOC: 0 ERR: 0 MIS: 0 2. When connecting a US B printer or harddrive, I get: Unable to connect USB device I tried one suggestion . Check if an usb-operating group exists in your Linux primary OS. 2. If the group exists: * Include into this group users who have to have an access to USB devices. * Proceed to step 5. 3. If the group does not exist: * Create a group and include into it users who have to have an access to USB devices. * In the /etc/fstab file edit the string that mounts the usbfs. Devgid parameter should contain the identifier of the group created in the previous step. usbfs /proc/bus/usb usbfs devgid=<USB gid>,devmode=0664 0 0 This option will of course only work if you have the relevant support compiled into your kernel. 4. Restart your Linux primary OS. This resulted in an error in /var/log/boot.msg: mount: mount point /proc/bus/usb does not exist Here is the fstab mod: usbfs /proc/bus/usb usbfs noauto 0 0 to usbfs /proc/bus/usb usbfs devgid=1000,devmode=0664 0 0 per the instructions above, after adding USB group which is 1000, I get the following in the /var/log/boot.msg file: Without the modification, I do not get the boot.msg error message, but in either case, I get the Unable to connect USB device error. Parallels is apparently working on this problem.