Re: [Qemu-devel] Re: Question about KVM and PC speaker
malc wrote: On Wed, 13 May 2009, Sebastian Herbszt wrote: Jan Kiszka wrote: Moreover, does sound work at all with your qemu? The image I tried [1] issues two beeps after loading (obviously via direct hw access) - a good way to check general support. Note that one reason for broken host sound with qemu can be OSS. For that reason I always configure my qemu with --audio-drv-list=alsa. Thats a good hint :) Seems i used to compile qemu without --audio-drv-list. Since dsound and fmod drivers don't compile here (i likely miss some libs in my mingw), i used sdl. Don't do that. Here's a nice tutorial Kazu made that will probably help you: http://www.h7.dion.ne.jp/~qemu-win/Audio-en.html So you're saying the use of sdl for audio is not recommended? Now i can hear those two beeps with the image you suggested. Tho those are coming thru my sound card and not the hosts pc speaker (even with -soundhw pcspk, but maybe that option means something different). And it will always come through your soundcard. pcspk is not a passthrough thing. Thanks for the clarification. With INT 10h AH=0Eh i now can hear a beep too, but it doesn't stop and qemu somewhat freezes. Huh? With this INT 10h function qemu should beep once, but it does loop the beep infinitely. Normally i can exit qemu by clicking on the [x] window close icon, but while it does endlessly beep that doesn't work (vista says process doesn't respond). Using quit in the monitor window doesn't work either. - Sebastian -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [Qemu-devel] Re: Question about KVM and PC speaker
On Thu, 14 May 2009, Sebastian Herbszt wrote: malc wrote: On Wed, 13 May 2009, Sebastian Herbszt wrote: Jan Kiszka wrote: Moreover, does sound work at all with your qemu? The image I tried [1] issues two beeps after loading (obviously via direct hw access) - a good way to check general support. Note that one reason for broken host sound with qemu can be OSS. For that reason I always configure my qemu with --audio-drv-list=alsa. Thats a good hint :) Seems i used to compile qemu without --audio-drv-list. Since dsound and fmod drivers don't compile here (i likely miss some libs in my mingw), i used sdl. Don't do that. Here's a nice tutorial Kazu made that will probably help you: http://www.h7.dion.ne.jp/~qemu-win/Audio-en.html So you're saying the use of sdl for audio is not recommended? Yes. Now i can hear those two beeps with the image you suggested. Tho those are coming thru my sound card and not the hosts pc speaker (even with -soundhw pcspk, but maybe that option means something different). And it will always come through your soundcard. pcspk is not a passthrough thing. Thanks for the clarification. With INT 10h AH=0Eh i now can hear a beep too, but it doesn't stop and qemu somewhat freezes. Huh? With this INT 10h function qemu should beep once, but it does loop the beep infinitely. Normally i can exit qemu by clicking on the [x] window close icon, but while it does endlessly beep that doesn't work (vista says process doesn't respond). Using quit in the monitor window doesn't work either. Can you post some .com file sparing me from writing the code for one myself? -- mailto:av1...@comtv.ru -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [Qemu-devel] Re: Question about KVM and PC speaker
Sebastian Herbszt wrote: Jan Kiszka wrote: Sebastian Herbszt wrote: Anyway, using timer ticks since midnight should be possible (INT 08h handler is set up before vga bios is called). I have implemented the beep for vgabios-6b and it works on bochs but fails on qemu. With -soundhw pcspk i should hear it thru the hosts pc speaker, right? Yep, that's how it should work. Mind to share your code and tell us which test case you used? Jan signature.asc Description: OpenPGP digital signature
Re: [Qemu-devel] Re: Question about KVM and PC speaker
On Wed, 13 May 2009, Sebastian Herbszt wrote: Jan Kiszka wrote: Sebastian Herbszt wrote: With the modified vgabios (see below) it does beep on bochs on vista, but not on qemu. Works fine for me! Did you check twice that your modified vgabios is actually loaded by qemu (e.g. via strace)? Yes, it uses the right rom. Moreover, does sound work at all with your qemu? The image I tried [1] issues two beeps after loading (obviously via direct hw access) - a good way to check general support. Note that one reason for broken host sound with qemu can be OSS. For that reason I always configure my qemu with --audio-drv-list=alsa. Thats a good hint :) Seems i used to compile qemu without --audio-drv-list. Since dsound and fmod drivers don't compile here (i likely miss some libs in my mingw), i used sdl. Don't do that. Here's a nice tutorial Kazu made that will probably help you: http://www.h7.dion.ne.jp/~qemu-win/Audio-en.html Now i can hear those two beeps with the image you suggested. Tho those are coming thru my sound card and not the hosts pc speaker (even with -soundhw pcspk, but maybe that option means something different). And it will always come through your soundcard. pcspk is not a passthrough thing. With INT 10h AH=0Eh i now can hear a beep too, but it doesn't stop and qemu somewhat freezes. Huh? Jan PS: Your patch was mangled by your mail client. Fortunately, it was small enough for manual fixing. Unfortunatelly Windows Mail tends to do this and i failed to find an option to fix it. - Sebastian -- mailto:av1...@comtv.ru -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [Qemu-devel] Re: Question about KVM and PC speaker
Jan Kiszka wrote: Sebastian Herbszt wrote: Jan Kiszka wrote: Sebastian Herbszt wrote: Simon Bienlein wrote: Is a support for BIOS worked on right now? The vgabios (vgabios.c) has a FIXME should beep. Volker, do you plan to fix this? Which frequency should be used for the beep? Which delay? I would try 1 KHz and some hundred milliseconds. I just looked at some vga bios and it uses about 896,45 Hz. Getting a delay using inb(0x61) 0x10 is still a no go on qemu, right? Looks like (should be far too inaccurate for longer delays). What about 0x40:0x6c, the BIOS' daily timer counter? The bios i looked at used the refresh request port 0x61. This is supported by bochs and there is also a patch for qemu to replace the dummy [1]. The rombios uses this to provide INT 15h AH=86h functionality; this is likely broken with the dummy code in qemu. I see no problem with improving qemu's emulation accuracy this way a bit. But I wouldn't built new delay implementations on top of it, specifically if the code is in fact aware of running over a hypervisor. Such micro-timings are far too inaccurate for longer delays in an environment where you cannot be sure of running all the time during that period. Volker, mind to resubmit the patch once again? Anyway, using timer ticks since midnight should be possible (INT 08h handler is set up before vga bios is called). I have implemented the beep for vgabios-6b and it works on bochs but fails on qemu. With -soundhw pcspk i should hear it thru the hosts pc speaker, right? - Sebastian -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [Qemu-devel] Re: Question about KVM and PC speaker
Sebastian Herbszt wrote: Jan Kiszka wrote: Sebastian Herbszt wrote: Simon Bienlein wrote: Is a support for BIOS worked on right now? The vgabios (vgabios.c) has a FIXME should beep. Volker, do you plan to fix this? Which frequency should be used for the beep? Which delay? I would try 1 KHz and some hundred milliseconds. I just looked at some vga bios and it uses about 896,45 Hz. Getting a delay using inb(0x61) 0x10 is still a no go on qemu, right? Looks like (should be far too inaccurate for longer delays). What about 0x40:0x6c, the BIOS' daily timer counter? The bios i looked at used the refresh request port 0x61. This is supported by bochs and there is also a patch for qemu to replace the dummy [1]. The rombios uses this to provide INT 15h AH=86h functionality; this is likely broken with the dummy code in qemu. I see no problem with improving qemu's emulation accuracy this way a bit. But I wouldn't built new delay implementations on top of it, specifically if the code is in fact aware of running over a hypervisor. Such micro-timings are far too inaccurate for longer delays in an environment where you cannot be sure of running all the time during that period. Anyway, using timer ticks since midnight should be possible (INT 08h handler is set up before vga bios is called). [1] http://article.gmane.org/gmane.comp.emulators.bochs.devel/7594 - Sebastian Jan -- Siemens AG, Corporate Technology, CT SE 2 Corporate Competence Center Embedded Linux -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [Qemu-devel] Re: Question about KVM and PC speaker
Sebastian Herbszt wrote: Simon Bienlein wrote: Is a support for BIOS worked on right now? The vgabios (vgabios.c) has a FIXME should beep. Volker, do you plan to fix this? Which frequency should be used for the beep? Which delay? I would try 1 KHz and some hundred milliseconds. Getting a delay using inb(0x61) 0x10 is still a no go on qemu, right? Looks like (should be far too inaccurate for longer delays). What about 0x40:0x6c, the BIOS' daily timer counter? Jan -- Siemens AG, Corporate Technology, CT SE 2 Corporate Competence Center Embedded Linux -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [Qemu-devel] Re: Question about KVM and PC speaker
Jan Kiszka wrote: Sebastian Herbszt wrote: Simon Bienlein wrote: Is a support for BIOS worked on right now? The vgabios (vgabios.c) has a FIXME should beep. Volker, do you plan to fix this? Which frequency should be used for the beep? Which delay? I would try 1 KHz and some hundred milliseconds. I just looked at some vga bios and it uses about 896,45 Hz. Getting a delay using inb(0x61) 0x10 is still a no go on qemu, right? Looks like (should be far too inaccurate for longer delays). What about 0x40:0x6c, the BIOS' daily timer counter? The bios i looked at used the refresh request port 0x61. This is supported by bochs and there is also a patch for qemu to replace the dummy [1]. The rombios uses this to provide INT 15h AH=86h functionality; this is likely broken with the dummy code in qemu. Anyway, using timer ticks since midnight should be possible (INT 08h handler is set up before vga bios is called). [1] http://article.gmane.org/gmane.comp.emulators.bochs.devel/7594 - Sebastian -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [Qemu-devel] Re: Question about KVM and PC speaker
Hello Jan, Am 04.05.2009 23:00, schrieb Jan Kiszka: Samuel Thibault wrote: Jan Kiszka, le Mon 04 May 2009 22:29:39 +0200, a écrit : When I boot the VM from the Lenny CD, there is no audible signal tone. Hmm, I successfully tested with '-soundbw pcspk' + my patches or -no-kvm-pit. There is probably a different, unrelated issue with your setup. Remember that the BIOS support for beeps is probably still missing. Simon, you should also test beeps from an installed Linux guest. Yeah, I forgot... :) Indeed, I only tested the console beep of a fully installed Linux guest. In this surrounding, the beep works fine at my place at well. However, the beep worked without the patching of the sources when I entered -no-kvm-pit. For me as a user there is no noticeable change with the patch. Is a support for BIOS worked on right now? Thanks in advance for the further help. Simon -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [Qemu-devel] Re: Question about KVM and PC speaker
Simon Bienlein wrote: Is a support for BIOS worked on right now? The vgabios (vgabios.c) has a FIXME should beep. Volker, do you plan to fix this? Which frequency should be used for the beep? Which delay? Getting a delay using inb(0x61) 0x10 is still a no go on qemu, right? - Sebastian -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [Qemu-devel] Re: Question about KVM and PC speaker
Hello Jan, thank you very much for processing my request. I [1]patched the KVM sources from Lenny and created a new Debian packet. When I boot the VM from the Lenny CD, there is no audible signal tone. It does not make a difference whether I start the KVM with or without the option -no-kvm-pit. What do I have to do in order to test the new function? Thanks in advance for the further help. Simon 1. http://patchwork.kernel.org/patch/19687/ -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [Qemu-devel] Re: Question about KVM and PC speaker
Simon Bienlein wrote: Hello Jan, thank you very much for processing my request. I [1]patched the KVM sources from Lenny and created a new Debian packet. Did you patch both kernel and user space? Note that my kernel patch was against the kernel git repository, not against the external modules delivered with kvm releases. Feasible to convert them, but maybe not straightforward. When I boot the VM from the Lenny CD, there is no audible signal tone. It does not make a difference whether I start the KVM with or without the option -no-kvm-pit. What do I have to do in order to test the new function? Hmm, I successfully tested with '-soundbw pcspk' + my patches or -no-kvm-pit. There is probably a different, unrelated issue with your setup. Jan signature.asc Description: OpenPGP digital signature
Re: [Qemu-devel] Re: Question about KVM and PC speaker
Samuel Thibault wrote: Jan Kiszka, le Mon 04 May 2009 22:29:39 +0200, a écrit : When I boot the VM from the Lenny CD, there is no audible signal tone. Hmm, I successfully tested with '-soundbw pcspk' + my patches or -no-kvm-pit. There is probably a different, unrelated issue with your setup. Remember that the BIOS support for beeps is probably still missing. Simon, you should also test beeps from an installed Linux guest. Yeah, I forgot... :) Indeed, I only tested the console beep of a fully installed Linux guest. Jan signature.asc Description: OpenPGP digital signature
Re: [Qemu-devel] Re: Question about KVM and PC speaker
Jan Kiszka, le Mon 04 May 2009 22:29:39 +0200, a écrit : When I boot the VM from the Lenny CD, there is no audible signal tone. Hmm, I successfully tested with '-soundbw pcspk' + my patches or -no-kvm-pit. There is probably a different, unrelated issue with your setup. Remember that the BIOS support for beeps is probably still missing. Simon, you should also test beeps from an installed Linux guest. Samuel -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [Qemu-devel] Re: Question about KVM and PC speaker
Avi Kivity wrote: Jan Kiszka wrote: Huh, it is! Then the problem is a KVM-only thing: The kernel part hooks onto those resources but doesn't communicate changes to this user space backend. In this case, the -no-kvm-pit option should help. Probably fine in many cases (where the PIT is no longer used anyway), just a bit unintuitive for users. I wonder why KVM moved port 0x61 handling into kernel space at all. By leaving it in pcspk hands and extending the latter to sync with the in-kernel PIT on sample generation, this speaker regression (of kvm-userspace) should have been avoidable. Jan -- Siemens AG, Corporate Technology, CT SE 2 Corporate Competence Center Embedded Linux -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [Qemu-devel] Re: Question about KVM and PC speaker
Jan Kiszka wrote: Avi Kivity wrote: Jan Kiszka wrote: Huh, it is! Then the problem is a KVM-only thing: The kernel part hooks onto those resources but doesn't communicate changes to this user space backend. In this case, the -no-kvm-pit option should help. Probably fine in many cases (where the PIT is no longer used anyway), just a bit unintuitive for users. Yes, it's only a workaround. I wonder why KVM moved port 0x61 handling into kernel space at all. By leaving it in pcspk hands and extending the latter to sync with the in-kernel PIT on sample generation, this speaker regression (of kvm-userspace) should have been avoidable. I'd rather not have partial components in the kernel. This case is particularly icky though. -- error compiling committee.c: too many arguments to function -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [Qemu-devel] Re: Question about KVM and PC speaker
Avi Kivity wrote: Jan Kiszka wrote: Avi Kivity wrote: Jan Kiszka wrote: Huh, it is! Then the problem is a KVM-only thing: The kernel part hooks onto those resources but doesn't communicate changes to this user space backend. In this case, the -no-kvm-pit option should help. Probably fine in many cases (where the PIT is no longer used anyway), just a bit unintuitive for users. Yes, it's only a workaround. I wonder why KVM moved port 0x61 handling into kernel space at all. By leaving it in pcspk hands and extending the latter to sync with the in-kernel PIT on sample generation, this speaker regression (of kvm-userspace) should have been avoidable. I'd rather not have partial components in the kernel. This case is particularly icky though. But you surely don't want to issue the sound from kernel space. Moreover, these are separate components: the PIT doesn't bother about the speaker, if it's on or off. We just need to make pcspk KVM-aware. I think I will post a patch later today. Jan -- Siemens AG, Corporate Technology, CT SE 2 Corporate Competence Center Embedded Linux -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
