Re: kvm win8 guest audio is terrible.
Den 31.05.2019 01:51, skrev R. Ramesh: More info needed: - HW (cpu, graphics, soundcard) Motherboard audio. I think it is realtek alc 887. So, bog standard. Should work. - BIOS (cpu power-states) Guest cpu? Not sure how to answer this. I did not do anything special. My command looks something like this No, bare metal. If the box takes a nap, sound will stop. Even 1 ns might be audible. /usr/bin/kvm -usbdevice tablet -full-screen -localtime\ ?? -vnc $vnc -k en-us \ ?? -drive file=$diskC,index=0,media=disk,cache=writeback \ ?? -vga qxl\ ?? -m 2047 -net nic,model=virtio,macaddr=$mac \ ?? -net tap,ifname=tap2,script=no\ ?? -soundhw all & I use pass-thru hdmi, and sound on that. Works well. Can't put my finger on anything you are doing wrong. I believe vnc is more light-weight than spice, so, good I believe. - Host setup (power states,audio setup) Host is core-i5 cpu. Here is the first few lines of cpuinfo processor : 0 vendor_id : GenuineIntel cpu family?? : 6 model : 42 model name?? : Intel(R) Core(TM) i5-2500K CPU @ 3.30GHz stepping?? : 7 microcode : 0x18 cpu MHz : 1651.812 cache size?? : 6144 KB Should have enough oomph. Throttled to half speed I see. Might want to set policy "performance". Again, check bios settings, and also power policy in host OS. - VM config. I think my kvm command line answers this. If not, please let me know what you are looking for. No further questions your honour. :-) . Can't help much I'm afraid. If you have more than one usb-"card" on your pci-bus, you might try to pass one directly to the guest, and use an USB sound-card, to by-pass all emulation. I do that for on guest I have (XEN, not kvm). Works OK-ish. USB-chips are finicky though, so it might not work. Different PCI devices might be on single chip that don't like to run on separate vm.
Re: Re: kvm win8 guest audio is terrible.
More info needed: - HW (cpu, graphics, soundcard) Motherboard audio. I think it is realtek alc 887. - BIOS (cpu power-states) Guest cpu? Not sure how to answer this. I did not do anything special. My command looks something like this /usr/bin/kvm -usbdevice tablet -full-screen -localtime\ ?? -vnc $vnc -k en-us \ ?? -drive file=$diskC,index=0,media=disk,cache=writeback \ ?? -vga qxl\ ?? -m 2047 -net nic,model=virtio,macaddr=$mac \ ?? -net tap,ifname=tap2,script=no\ ?? -soundhw all & - Host setup (power states,audio setup) Host is core-i5 cpu. Here is the first few lines of cpuinfo processor : 0 vendor_id : GenuineIntel cpu family?? : 6 model : 42 model name?? : Intel(R) Core(TM) i5-2500K CPU @ 3.30GHz stepping?? : 7 microcode : 0x18 cpu MHz : 1651.812 cache size?? : 6144 KB - VM config. I think my kvm command line answers this. If not, please let me know what you are looking for. Regards Ramesh
Re: Re: kvm win8 guest audio is terrible.
On 5/20/19 10:35 PM, David Christensen wrote: On 5/20/19 2:55 PM, R. Ramesh wrote: I created a fresh install of debian stretch amd64. In that I created a qemu/kvm guess install of win8. It only accepted hda as a valid sound card. All others show us without drivers. So, I am limited to only HDA as -soundhw. Further HDA sounds so broken if I try to test with any sound file or youtube video. It is grainy/distorted and outright horrible. Google searches mentions something about MSI and those approaches are simply not accepted by win8. So, I could not use them. I am wondering if there is something fundamentally wrong with windows guests or is there a setting that I missing. Ramesh Have you tried spice under Virtual Machine manager??? I used to have similar problems.?? Let all 6 cores run at maximum speed helped some but still occasional dropouts in Win7 and Win10.?? I switched to spice and audio and video improved greatly. -- I invoke qemu-kvm directly. Do I have to use virtsh or virt manager? I am not set up for that. Also, googling spice does not get to the correct links.?? Can you help? Ramesh
Re: kvm win8 guest audio is terrible.
Den 22.05.2019 22:33, skrev Ram Ramesh: I created a fresh install of debian stretch amd64. In that, I created a qemu/kvm guess install of win8. It only accepted hda as a valid sound card. All others show us without drivers. So, I am limited to only HDA as -soundhw. Further HDA sounds so broken if I try to test with any sound file or youtube video. It is grainy/distorted and outright horrible. Google searches mentions something about MSI and those approaches are simply not accepted by win8. So, I could not use them. I am wondering if there is something fundamentally wrong with windows guests or is there a setting that I am missing? More info needed: - HW (cpu, graphics, soundcard) - BIOS (cpu power-states) - Host setup (power states,audio setup) - VM config. Most important: where have you looked trying to solve this? --- PS: I run Xen, not qemu, but issues are same. I have max c-state 2 on xeon E5-2620, HDMI graphics passed thru as PCI, with good HDMI-audio in windows 8. Needed to drop spice because load on host got too high, ruined audio.
kvm win8 guest audio is terrible.
I created a fresh install of debian stretch amd64. In that, I created a qemu/kvm guess install of win8. It only accepted hda as a valid sound card. All others show us without drivers. So, I am limited to only HDA as -soundhw. Further HDA sounds so broken if I try to test with any sound file or youtube video. It is grainy/distorted and outright horrible. Google searches mentions something about MSI and those approaches are simply not accepted by win8. So, I could not use them. I am wondering if there is something fundamentally wrong with windows guests or is there a setting that I am missing? Ramesh
Re: kvm win8 guest audio is terrible.
On 5/20/19 10:35 PM, David Christensen wrote: On 5/20/19 2:55 PM, R. Ramesh wrote: I created a fresh install of debian stretch amd64. In that I created a qemu/kvm guess install of win8. It only accepted hda as a valid sound card. All others show us without drivers. So, I am limited to only HDA as -soundhw. Further HDA sounds so broken if I try to test with any sound file or youtube video. It is grainy/distorted and outright horrible. Google searches mentions something about MSI and those approaches are simply not accepted by win8. So, I could not use them. I am wondering if there is something fundamentally wrong with windows guests or is there a setting that I missing. Ramesh Have you tried spice under Virtual Machine manager? I used to have similar problems. Let all 6 cores run at maximum speed helped some but still occasional dropouts in Win7 and Win10. I switched to spice and audio and video improved greatly. -- *...Bob*
Re: kvm win8 guest audio is terrible.
On 5/20/19 2:55 PM, R. Ramesh wrote: I created a fresh install of debian stretch amd64. In that I created a qemu/kvm guess install of win8. It only accepted hda as a valid sound card. All others show us without drivers. So, I am limited to only HDA as -soundhw. Further HDA sounds so broken if I try to test with any sound file or youtube video. It is grainy/distorted and outright horrible. Google searches mentions something about MSI and those approaches are simply not accepted by win8. So, I could not use them. I am wondering if there is something fundamentally wrong with windows guests or is there a setting that I missing. Ramesh I have yet to see any virtual machine be as responsive as a host. The latency is especially obvious when playing multimedia -- e.g. audio and video. (I assume video games would be equally bad.) If you want good audio and video performance, install Windows 8 directly on hardware. David
kvm win8 guest audio is terrible.
I created a fresh install of debian stretch amd64. In that I created a qemu/kvm guess install of win8. It only accepted hda as a valid sound card. All others show us without drivers. So, I am limited to only HDA as -soundhw. Further HDA sounds so broken if I try to test with any sound file or youtube video. It is grainy/distorted and outright horrible. Google searches mentions something about MSI and those approaches are simply not accepted by win8. So, I could not use them. I am wondering if there is something fundamentally wrong with windows guests or is there a setting that I missing. Ramesh
