Hi bugs@, sendbug ate my report, so here's it again.
Today i noticed that the sound volume changed a little bit when playing two files simultaniously (amd64 snapshot from 24.1., dmesg below). I tried multiple variations of players and files (mplayer and vlc, and mp3, wav and mp4 sound/video files), but the issue was always the same. I tested with my headphones only. So here's what i did: first, i played an mp3 file with mplayer, and then started a video with vlc. Immediately after the video startet, the overall volume dropped a bit (not much, but i could notice it). After closing one of the players, the volume got restored. As i said, i tried with multiple players and files, and also checked the output of mixerctl(1) for each combination, but the settings were never changed. Nils Output of mixerclt: inputs.dac-0:1=192,192 inputs.dac-4:5=126,126 inputs.dac-2:3=126,126 inputs.dac-6:7=126,126 record.adc-0:1_mute=off record.adc-0:1=125,125 record.adc-2:3_mute=off record.adc-2:3=125,125 record.dig-adc-0:1_sou=SPDIF-in inputs.mix_source=mic,mic2,line-in,hp,line-grn,line-blk,line-org,line-gry inputs.mix_mic=120,120 inputs.mix_mic2=120,120 inputs.mix_line-in=120,120 inputs.mix_hp=120,120 inputs.mix_line-grn=120,120 inputs.mix_line-blk=120,120 inputs.mix_line-org=120,120 inputs.mix_line-gry=120,120 inputs.mix2_source=dac-0:1,mix inputs.mix3_source=dac-4:5,mix inputs.mix4_source=dac-2:3,mix inputs.mix5_source=dac-6:7,mix outputs.SPDIF_source=dig-dac-2:3 outputs.line-grn_source=mix2 outputs.line-grn_mute=off outputs.line-grn_dir=output outputs.line-grn_boost=off outputs.line-blk_source=mix3 outputs.line-blk_mute=off outputs.line-blk_dir=output outputs.line-org_source=mix4 outputs.line-org_mute=off outputs.line-org_dir=output outputs.line-gry_source=mix5 outputs.line-gry_mute=off outputs.line-gry_dir=output outputs.mic_source=mix2 outputs.mic_mute=off inputs.mic=85,85 outputs.mic_dir=input-vr80 outputs.mic2_source=mix2 outputs.mic2_mute=off inputs.mic2=85,85 outputs.mic2_dir=input-vr80 outputs.mic2_boost=off outputs.line-in_source=mix2 outputs.line-in_mute=off inputs.line-in=85,85 outputs.line-in_dir=input outputs.hp_source=mix8 outputs.hp_mute=off inputs.hp=85,85 outputs.hp_dir=output outputs.hp_boost=off outputs.SPDIF2_source=dig-dac-0:1 record.adc-2:3_source=mic,mic2,line-in,hp,line-grn,line-blk,line-org,line-gry,mix record.adc-0:1_source=mic,mic2,line-in,hp,line-grn,line-blk,line-org,line-gry,mix inputs.dac-8:9=192,192 inputs.mix8_source=dac-8:9,mix outputs.line-grn_sense=plugged outputs.line-blk_sense=unplugged outputs.line-org_sense=unplugged outputs.line-gry_sense=unplugged outputs.mic_sense=plugged outputs.mic2_sense=unplugged outputs.line-in_sense=unplugged outputs.hp_sense=unplugged outputs.master=255,255 outputs.master.mute=off outputs.master.slaves=dac-0:1,line-grn,hp,dac-8:9 record.volume=125,125 record.volume.mute=off record.volume.slaves=adc-0:1,adc-2:3 outputs.mode=analog record.mode=analog dmesg: OpenBSD 5.5-beta (GENERIC.MP) #279: Fri Jan 24 11:50:37 MST 2014 t...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP real mem = 3738107904 (3564MB) avail mem = 3630379008 (3462MB) mainbus0 at root bios0 at mainbus0: SMBIOS rev. 2.4 @ 0xf0100 (61 entries) bios0: vendor Award Software International, Inc. version "F4" date 07/28/2010 bios0: Gigabyte Technology Co., Ltd. GA-880GMA-UD2H acpi0 at bios0: rev 0 acpi0: sleep states S0 S3 S4 S5 acpi0: tables DSDT FACP SSDT HPET MCFG MATS APIC acpi0: wakeup devices USB0(S3) USB1(S3) USB2(S3) USB3(S3) USB4(S3) USB5(S3) USB6(S3) SBAZ(S4) PEX0(S5) PEX1(S5) PEX2(S5) PEX3(S5) P2P_(S5) PCE2(S4) PCE3(S4) PCE4(S4) [...] acpitimer0 at acpi0: 3579545 Hz, 32 bits acpihpet0 at acpi0: 14318180 Hz acpimcfg0 at acpi0 addr 0xe0000000, bus 0-255 acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat cpu0 at mainbus0: apid 0 (boot processor) cpu0: AMD Athlon(tm) II X2 240e Processor, 11252.14 MHz cpu0: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT,SSE3,MWAIT,CX16,POPCNT,NXE,MMXX,FFXSR,LONG,3DNOW2,3DNOW,LAHF,CMPLEG,SVM,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,IBS,SKINIT,ITSC cpu0: 64KB 64b/line 2-way I-cache, 64KB 64b/line 2-way D-cache, 1MB 64b/line 16-way L2 cache cpu0: ITLB 32 4KB entries fully associative, 16 4MB entries fully associative cpu0: DTLB 48 4KB entries fully associative, 48 4MB entries fully associative cpu0: AMD erratum 721 detected and fixed cpu0: smt 0, core 0, package 0 mtrr: Pentium Pro MTRR support, 8 var ranges, 88 fixed ranges cpu0: apic clock running at 200MHz cpu0: mwait min=64, max=64, C-substates=0.0.0.0.0, IBE cpu1 at mainbus0: apid 1 (application processor) cpu1: AMD Athlon(tm) II X2 240e Processor, 2812.94 MHz cpu1: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT,SSE3,MWAIT,CX16,POPCNT,NXE,MMXX,FFXSR,LONG,3DNOW2,3DNOW,LAHF,CMPLEG,SVM,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,IBS,SKINIT,ITSC cpu1: 64KB 64b/line 2-way I-cache, 64KB 64b/line 2-way D-cache, 1MB 64b/line 16-way L2 cache cpu1: ITLB 32 4KB entries fully associative, 16 4MB entries fully associative cpu1: DTLB 48 4KB entries fully associative, 48 4MB entries fully associative cpu1: AMD erratum 721 detected and fixed cpu1: smt 0, core 1, package 0 ioapic0 at mainbus0: apid 2 pa 0xfec00000, version 21, 24 pins ioapic0: misconfigured as apic 0, remapped to apid 2 acpiprt0 at acpi0: bus 0 (PCI0) acpiprt1 at acpi0: bus 5 (PEX0) acpiprt2 at acpi0: bus 6 (PEX1) acpiprt3 at acpi0: bus -1 (PEX2) acpiprt4 at acpi0: bus -1 (PEX3) acpiprt5 at acpi0: bus 4 (P2P_) acpiprt6 at acpi0: bus -1 (PCE2) acpiprt7 at acpi0: bus -1 (PCE3) acpiprt8 at acpi0: bus -1 (PCE4) acpiprt9 at acpi0: bus -1 (PCE5) acpiprt10 at acpi0: bus -1 (PCE6) acpiprt11 at acpi0: bus -1 (PCE7) acpiprt12 at acpi0: bus 2 (PCE9) acpiprt13 at acpi0: bus 3 (PCEA) acpiprt14 at acpi0: bus -1 (PCEB) acpiprt15 at acpi0: bus -1 (PCEC) acpiprt16 at acpi0: bus 1 (AGP_) acpicpu0 at acpi0: PSS acpicpu1 at acpi0: PSS acpibtn0 at acpi0: PWRB cpu0: 11252 MHz: speeds: 2800 2100 1600 800 MHz pci0 at mainbus0 bus 0 0:0:0: mem address conflict 0xe0000000/0x20000000 pchb0 at pci0 dev 0 function 0 "AMD RS880 Host" rev 0x00 ppb0 at pci0 dev 1 function 0 "AMD RS780 PCIE" rev 0x00 pci1 at ppb0 bus 1 radeondrm0 at pci1 dev 5 function 0 "ATI Radeon HD 4250" rev 0x00 drm0 at radeondrm0 radeondrm0: apic 2 int 18 azalia0 at pci1 dev 5 function 1 "ATI Radeon HD 4200 HD Audio" rev 0x00: msi azalia0: no supported codecs ppb1 at pci0 dev 9 function 0 "AMD RS780 PCIE" rev 0x00: msi pci2 at ppb1 bus 2 "NEC xHCI" rev 0x03 at pci2 dev 0 function 0 not configured ppb2 at pci0 dev 10 function 0 "AMD RS780 PCIE" rev 0x00: msi pci3 at ppb2 bus 3 re0 at pci3 dev 0 function 0 "Realtek 8168" rev 0x03: RTL8168D/8111D (0x2800), msi, address XXX rgephy0 at re0 phy 7: RTL8169S/8110S PHY, rev. 2 ahci0 at pci0 dev 17 function 0 "ATI SBx00 SATA" rev 0x40: apic 2 int 19, AHCI 1.2 scsibus0 at ahci0: 32 targets sd0 at scsibus0 targ 0 lun 0: <ATA, SAMSUNG SSD 830, CXM0> SCSI3 0/direct fixed naa.5002538043584d30 sd0: 244198MB, 512 bytes/sector, 500118192 sectors, thin sd1 at scsibus0 targ 1 lun 0: <ATA, WDC WD10EADS-19M, 01.0> SCSI3 0/direct fixed naa.50014ee25a2d138a sd1: 953869MB, 512 bytes/sector, 1953525168 sectors cd0 at scsibus0 targ 4 lun 0: <Optiarc, DVD RW AD-7260S, 1.03> ATAPI 5/cdrom removable ohci0 at pci0 dev 18 function 0 "ATI SB700 USB" rev 0x00: apic 2 int 18, version 1.0, legacy support ehci0 at pci0 dev 18 function 2 "ATI SB700 USB2" rev 0x00: apic 2 int 17 usb0 at ehci0: USB revision 2.0 uhub0 at usb0 "ATI EHCI root hub" rev 2.00/1.00 addr 1 ohci1 at pci0 dev 19 function 0 "ATI SB700 USB" rev 0x00: apic 2 int 18, version 1.0, legacy support ehci1 at pci0 dev 19 function 2 "ATI SB700 USB2" rev 0x00: apic 2 int 17 usb1 at ehci1: USB revision 2.0 uhub1 at usb1 "ATI EHCI root hub" rev 2.00/1.00 addr 1 piixpm0 at pci0 dev 20 function 0 "ATI SBx00 SMBus" rev 0x41: polling iic0 at piixpm0 spdmem0 at iic0 addr 0x50: 2GB DDR3 SDRAM PC3-10600 spdmem1 at iic0 addr 0x51: 2GB DDR3 SDRAM PC3-10600 azalia1 at pci0 dev 20 function 2 "ATI SBx00 HD Audio" rev 0x40: apic 2 int 16 azalia1: codecs: Realtek/0x0892 audio0 at azalia1 pcib0 at pci0 dev 20 function 3 "ATI SB700 ISA" rev 0x40 ppb3 at pci0 dev 20 function 4 "ATI SB600 PCI" rev 0x40 pci4 at ppb3 bus 4 ath0 at pci4 dev 6 function 0 "Atheros AR2413" rev 0x01: apic 2 int 20 ath0: AR2413 7.8 phy 4.5 rf 5.6, FCC2A*, address XXX ohci2 at pci0 dev 20 function 5 "ATI SB700 USB" rev 0x00: apic 2 int 18, version 1.0, legacy support ppb4 at pci0 dev 21 function 0 "ATI SB800 PCIE" rev 0x00: msi pci5 at ppb4 bus 5 jmb0 at pci5 dev 0 function 0 "JMicron JMB368 IDE" rev 0x00 pciide0 at jmb0: DMA, channel 0 wired to native-PCI, channel 1 wired to native-PCI pciide0: using apic 2 int 17 for native-PCI interrupt pciide0: channel 0 disabled (no drives) pciide0: channel 1 disabled (no drives) ppb5 at pci0 dev 21 function 1 "ATI SB800 PCIE" rev 0x00: msi pci6 at ppb5 bus 6 ohci3 at pci0 dev 22 function 0 "ATI SB700 USB" rev 0x00: apic 2 int 18, version 1.0, legacy support ehci2 at pci0 dev 22 function 2 "ATI SB700 USB2" rev 0x00: apic 2 int 17 usb2 at ehci2: USB revision 2.0 uhub2 at usb2 "ATI EHCI root hub" rev 2.00/1.00 addr 1 pchb1 at pci0 dev 24 function 0 "AMD AMD64 10h HyperTransport" rev 0x00 pchb2 at pci0 dev 24 function 1 "AMD AMD64 10h Address Map" rev 0x00 pchb3 at pci0 dev 24 function 2 "AMD AMD64 10h DRAM Cfg" rev 0x00 km0 at pci0 dev 24 function 3 "AMD AMD64 10h Misc Cfg" rev 0x00 pchb4 at pci0 dev 24 function 4 "AMD AMD64 10h Link Cfg" rev 0x00 usb3 at ohci0: USB revision 1.0 uhub3 at usb3 "ATI OHCI root hub" rev 1.00/1.00 addr 1 usb4 at ohci1: USB revision 1.0 uhub4 at usb4 "ATI OHCI root hub" rev 1.00/1.00 addr 1 isa0 at pcib0 isadma0 at isa0 com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo pckbc0 at isa0 port 0x60/5 pckbd0 at pckbc0 (kbd slot) pckbc0: using irq 1 for kbd slot wskbd0 at pckbd0: console keyboard pcppi0 at isa0 port 0x61 spkr0 at pcppi0 it0 at isa0 port 0x2e/2: IT8720F rev 8, EC port 0x228 usb5 at ohci2: USB revision 1.0 uhub5 at usb5 "ATI OHCI root hub" rev 1.00/1.00 addr 1 usb6 at ohci3: USB revision 1.0 uhub6 at usb6 "ATI OHCI root hub" rev 1.00/1.00 addr 1 umass0 at uhub1 port 5 configuration 1 interface 0 "Generic Mass Storage Device" rev 2.00/1.00 addr 2 umass0: using SCSI over Bulk-Only scsibus1 at umass0: 2 targets, initiator 0 sd2 at scsibus1 targ 1 lun 0: <Generic-, SD/MMC, 1.00> SCSI0 0/direct removable sd3 at scsibus1 targ 1 lun 1: <Generic-, Compact Flash, 1.01> SCSI0 0/direct removable sd4 at scsibus1 targ 1 lun 2: <Generic-, SM/xD-Picture, 1.02> SCSI0 0/direct removable sd5 at scsibus1 targ 1 lun 3: <Generic-, MS/MS-Pro, 1.03> SCSI0 0/direct removable uhidev0 at uhub4 port 1 configuration 1 interface 0 "Logitech USB-PS/2 Optical Mouse" rev 2.00/21.00 addr 2 uhidev0: iclass 3/1 ums0 at uhidev0: 8 buttons, Z dir wsmouse0 at ums0 mux 0 vscsi0 at root scsibus2 at vscsi0: 256 targets softraid0 at root scsibus3 at softraid0: 256 targets root on sd0a (6de79c244a03d47a.a) swap on sd0b dump on sd0b drm: initializing kernel modesetting (RS880 0x1002:0x9715 0x1458:0xD000). radeondrm0: VRAM: 512M 0x00000000C0000000 - 0x00000000DFFFFFFF (512M used) radeondrm0: GTT: 512M 0x00000000A0000000 - 0x00000000BFFFFFFF ttm_pool_mm_shrink_init stub drm: PCIE GART of 512M enabled (table at 0x00000000C0040000). radeondrm0: 1680x1050 wsdisplay0 at radeondrm0 mux 1: console (std, vt100 emulation), using wskbd0 wsdisplay0: screen 1-5 added (std, vt100 emulation) acpi0: PM1 stuck (en 0x121 st 0x1), clearing