Thanks Jason. I found your post already, but I can't boot an old kernel. That was my biggest problem. ;-) Lars Original Message processed by david® [BlueOnyx:12644] Re: Urgent Hyper-V problem - please help :-) (29-Mrz-2013 18:07) From: bluequa...@ozin.com To (2):'BlueOnyx General Mailing List', blueo...@blueonyx.it Kernel 5.9 and 6.4 (2.6.32-358) has proper built in support for Hyper-V All you need to do is: Boot into the old kernel Remove the old Hyper-V components as follows: Execute the following steps in the bash shell. 1. First, execute: rpm qa | grep microsoft Example: On a RHEL 5.8 system, you will see the following: # rpm qa | grep microsoft kmod-microsoft-hyper-v-3.4-1.20120727 microsoft-hyper-v-3.4.20120727 2. Next, execute: rpm e microsoft-hyper-v-<version string from step 1> kmod-microsoft-hyper-v-<version string from step 1> Then reboot into the new kernel 2.6.32-358 You can then add a NON-LEGACY network card and have a much faster network stack. Give the new card the same Virtual MAC as the old card and there are no config changes needed either Jason Ozin From: blueonyx-boun...@mail.blueonyx.it [mailto:blueonyx-boun...@mail.blueonyx.it] On Behalf Of blueo...@larsi.de Sent: 29 March 2013 16:52 To: blueo...@blueonyx.it Subject: [BlueOnyx:12643] Urgent Hyper-V problem - please help :-) Hello, I did a yum update on a customers server and after that there is no network connection. I read all the issues with hyper-v and sometime ago Michael noticed a problem with irqbalancing on this server. But this time "service irqbalancing stop" did not change anything. All solutions point me to boot an older kernel, but I can't do this. Everytime I boot the machine, it allways go to the last kernel and changing the grub.conf only results in a broken server, which won't boot anymore. Does anyone has an idea for me? I can boot the server in kernel 2.6.32-279.5.1.el6.i686. Thanks in advance. Lars.
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