1# ALSA PCI drivers 2 3menu "PCI devices" 4 depends on SND!=n && PCI 5 6config SND_AD1889 7 tristate "Analog Devices AD1889" 8 depends on SND 9 select SND_AC97_CODEC 10 help 11 Say Y here to include support for the integrated AC97 sound 12 device found in particular on the Hewlett-Packard [BCJ]-xxx0 13 class PA-RISC workstations, using the AD1819 codec. 14 15 To compile this as a module, choose M here: the module 16 will be called snd-ad1889. 17 18config SND_ALS300 19 tristate "Avance Logic ALS300/ALS300+" 20 depends on SND 21 select SND_PCM 22 select SND_AC97_CODEC 23 select SND_OPL3_LIB 24 help 25 Say 'Y' or 'M' to include support for Avance Logic ALS300/ALS300+ 26 27 To compile this driver as a module, choose M here: the module 28 will be called snd-als300 29 30config SND_ALS4000 31 tristate "Avance Logic ALS4000" 32 depends on SND && ISA_DMA_API 33 select SND_OPL3_LIB 34 select SND_MPU401_UART 35 select SND_PCM 36 help 37 Say Y here to include support for soundcards based on Avance Logic 38 ALS4000 chips. 39 40 To compile this driver as a module, choose M here: the module 41 will be called snd-als4000. 42 43config SND_ALI5451 44 tristate "ALi M5451 PCI Audio Controller" 45 depends on SND 46 select SND_MPU401_UART 47 select SND_AC97_CODEC 48 help 49 Say Y here to include support for the integrated AC97 sound 50 device on motherboards using the ALi M5451 Audio Controller 51 (M1535/M1535D/M1535+/M1535D+ south bridges). Newer chipsets 52 use the "Intel/SiS/nVidia/AMD/ALi AC97 Controller" driver. 53 54 To compile this driver as a module, choose M here: the module 55 will be called snd-ali5451. 56 57config SND_ATIIXP 58 tristate "ATI IXP AC97 Controller" 59 depends on SND 60 select SND_AC97_CODEC 61 help 62 Say Y here to include support for the integrated AC97 sound 63 device on motherboards with ATI chipsets (ATI IXP 150/200/250/ 64 300/400). 65 66 To compile this driver as a module, choose M here: the module 67 will be called snd-atiixp. 68 69config SND_ATIIXP_MODEM 70 tristate "ATI IXP Modem" 71 depends on SND 72 select SND_AC97_CODEC 73 help 74 Say Y here to include support for the integrated MC97 modem on 75 motherboards with ATI chipsets (ATI IXP 150/200/250). 76 77 To compile this driver as a module, choose M here: the module 78 will be called snd-atiixp-modem. 79 80config SND_AU8810 81 tristate "Aureal Advantage" 82 depends on SND 83 select SND_MPU401_UART 84 select SND_AC97_CODEC 85 help 86 Say Y here to include support for Aureal Advantage soundcards. 87 88 Supported features: Hardware Mixer, SRC, EQ and SPDIF output. 89 3D support code is in place, but not yet useable. For more info, 90 email the ALSA developer list, or <mjander@users.sourceforge.net>. 91 92 To compile this driver as a module, choose M here: the module 93 will be called snd-au8810. 94 95config SND_AU8820 96 tristate "Aureal Vortex" 97 depends on SND 98 select SND_MPU401_UART 99 select SND_AC97_CODEC 100 help 101 Say Y here to include support for Aureal Vortex soundcards. 102 103 Supported features: Hardware Mixer and SRC. For more info, email 104 the ALSA developer list, or <mjander@users.sourceforge.net>. 105 106 To compile this driver as a module, choose M here: the module 107 will be called snd-au8820. 108 109config SND_AU8830 110 tristate "Aureal Vortex 2" 111 depends on SND 112 select SND_MPU401_UART 113 select SND_AC97_CODEC 114 help 115 Say Y here to include support for Aureal Vortex 2 soundcards. 116 117 Supported features: Hardware Mixer, SRC, EQ and SPDIF output. 118 3D support code is in place, but not yet useable. For more info, 119 email the ALSA developer list, or <mjander@users.sourceforge.net>. 120 121 To compile this driver as a module, choose M here: the module 122 will be called snd-au8830. 123 124config SND_AZT3328 125 tristate "Aztech AZF3328 / PCI168 (EXPERIMENTAL)" 126 depends on SND && EXPERIMENTAL 127 select SND_OPL3_LIB 128 select SND_MPU401_UART 129 select SND_PCM 130 help 131 Say Y here to include support for Aztech AZF3328 (PCI168) 132 soundcards. 133 134 To compile this driver as a module, choose M here: the module 135 will be called snd-azt3328. 136 137config SND_BT87X 138 tristate "Bt87x Audio Capture" 139 depends on SND 140 select SND_PCM 141 help 142 If you want to record audio from TV cards based on 143 Brooktree Bt878/Bt879 chips, say Y here and read 144 <file:Documentation/sound/alsa/Bt87x.txt>. 145 146 To compile this driver as a module, choose M here: the module 147 will be called snd-bt87x. 148 149config SND_BT87X_OVERCLOCK 150 bool "Bt87x Audio overclocking" 151 depends on SND_BT87X 152 help 153 Say Y here if 448000 Hz isn't enough for you and you want to 154 record from the analog input with up to 1792000 Hz. 155 156 Higher sample rates won't hurt your hardware, but audio 157 quality may suffer. 158 159config SND_CA0106 160 tristate "SB Audigy LS / Live 24bit" 161 depends on SND 162 select SND_AC97_CODEC 163 select SND_RAWMIDI 164 help 165 Say Y here to include support for the Sound Blaster Audigy LS 166 and Live 24bit. 167 168 To compile this driver as a module, choose M here: the module 169 will be called snd-ca0106. 170 171config SND_CMIPCI 172 tristate "C-Media 8738, 8338" 173 depends on SND 174 select SND_OPL3_LIB 175 select SND_MPU401_UART 176 select SND_PCM 177 help 178 If you want to use soundcards based on C-Media CMI8338 or CMI8738 179 chips, say Y here and read 180 <file:Documentation/sound/alsa/CMIPCI.txt>. 181 182 To compile this driver as a module, choose M here: the module 183 will be called snd-cmipci. 184 185config SND_CS4281 186 tristate "Cirrus Logic (Sound Fusion) CS4281" 187 depends on SND 188 select SND_OPL3_LIB 189 select SND_RAWMIDI 190 select SND_AC97_CODEC 191 help 192 Say Y here to include support for Cirrus Logic CS4281 chips. 193 194 To compile this driver as a module, choose M here: the module 195 will be called snd-cs4281. 196 197config SND_CS46XX 198 tristate "Cirrus Logic (Sound Fusion) CS4280/CS461x/CS462x/CS463x" 199 depends on SND 200 select SND_RAWMIDI 201 select SND_AC97_CODEC 202 help 203 Say Y here to include support for Cirrus Logic CS4610/CS4612/ 204 CS4614/CS4615/CS4622/CS4624/CS4630/CS4280 chips. 205 206 To compile this driver as a module, choose M here: the module 207 will be called snd-cs46xx. 208 209config SND_CS46XX_NEW_DSP 210 bool "Cirrus Logic (Sound Fusion) New DSP support" 211 depends on SND_CS46XX 212 default y 213 help 214 Say Y here to use a new DSP image for SPDIF and dual codecs. 215 216 This works better than the old code, so say Y. 217 218config SND_CS5535AUDIO 219 tristate "CS5535/CS5536 Audio" 220 depends on SND && X86 && !X86_64 221 select SND_PCM 222 select SND_AC97_CODEC 223 help 224 Say Y here to include support for audio on CS5535 chips. It is 225 referred to as NS CS5535 IO or AMD CS5535 IO companion in 226 various literature. This driver also supports the CS5536 audio 227 device. However, for both chips, on certain boards, you may 228 need to use ac97_quirk=hp_only if your board has physically 229 mapped headphone out to master output. If that works for you, 230 send lspci -vvv output to the mailing list so that your board 231 can be identified in the quirks list. 232 233 To compile this driver as a module, choose M here: the module 234 will be called snd-cs5535audio. 235 236config SND_DARLA20 237 tristate "(Echoaudio) Darla20" 238 depends on SND 239 select FW_LOADER 240 select SND_PCM 241 help 242 Say 'Y' or 'M' to include support for Echoaudio Darla. 243 244 To compile this driver as a module, choose M here: the module 245 will be called snd-darla20 246 247config SND_GINA20 248 tristate "(Echoaudio) Gina20" 249 depends on SND 250 select FW_LOADER 251 select SND_PCM 252 help 253 Say 'Y' or 'M' to include support for Echoaudio Gina. 254 255 To compile this driver as a module, choose M here: the module 256 will be called snd-gina20 257 258config SND_LAYLA20 259 tristate "(Echoaudio) Layla20" 260 depends on SND 261 select FW_LOADER 262 select SND_RAWMIDI 263 select SND_PCM 264 help 265 Say 'Y' or 'M' to include support for Echoaudio Layla. 266 267 To compile this driver as a module, choose M here: the module 268 will be called snd-layla20 269 270config SND_DARLA24 271 tristate "(Echoaudio) Darla24" 272 depends on SND 273 select FW_LOADER 274 select SND_PCM 275 help 276 Say 'Y' or 'M' to include support for Echoaudio Darla24. 277 278 To compile this driver as a module, choose M here: the module 279 will be called snd-darla24 280 281config SND_GINA24 282 tristate "(Echoaudio) Gina24" 283 depends on SND 284 select FW_LOADER 285 select SND_PCM 286 help 287 Say 'Y' or 'M' to include support for Echoaudio Gina24. 288 289 To compile this driver as a module, choose M here: the module 290 will be called snd-gina24 291 292config SND_LAYLA24 293 tristate "(Echoaudio) Layla24" 294 depends on SND 295 select FW_LOADER 296 select SND_RAWMIDI 297 select SND_PCM 298 help 299 Say 'Y' or 'M' to include support for Echoaudio Layla24. 300 301 To compile this driver as a module, choose M here: the module 302 will be called snd-layla24 303 304config SND_MONA 305 tristate "(Echoaudio) Mona" 306 depends on SND 307 select FW_LOADER 308 select SND_RAWMIDI 309 select SND_PCM 310 help 311 Say 'Y' or 'M' to include support for Echoaudio Mona. 312 313 To compile this driver as a module, choose M here: the module 314 will be called snd-mona 315 316config SND_MIA 317 tristate "(Echoaudio) Mia" 318 depends on SND 319 select FW_LOADER 320 select SND_RAWMIDI 321 select SND_PCM 322 help 323 Say 'Y' or 'M' to include support for Echoaudio Mia and Mia-midi. 324 325 To compile this driver as a module, choose M here: the module 326 will be called snd-mia 327 328config SND_ECHO3G 329 tristate "(Echoaudio) 3G cards" 330 depends on SND 331 select FW_LOADER 332 select SND_RAWMIDI 333 select SND_PCM 334 help 335 Say 'Y' or 'M' to include support for Echoaudio Gina3G and Layla3G. 336 337 To compile this driver as a module, choose M here: the module 338 will be called snd-echo3g 339 340config SND_INDIGO 341 tristate "(Echoaudio) Indigo" 342 depends on SND 343 select FW_LOADER 344 select SND_PCM 345 help 346 Say 'Y' or 'M' to include support for Echoaudio Indigo. 347 348 To compile this driver as a module, choose M here: the module 349 will be called snd-indigo 350 351config SND_INDIGOIO 352 tristate "(Echoaudio) Indigo IO" 353 depends on SND 354 select FW_LOADER 355 select SND_PCM 356 help 357 Say 'Y' or 'M' to include support for Echoaudio Indigo IO. 358 359 To compile this driver as a module, choose M here: the module 360 will be called snd-indigoio 361 362config SND_INDIGODJ 363 tristate "(Echoaudio) Indigo DJ" 364 depends on SND 365 select FW_LOADER 366 select SND_PCM 367 help 368 Say 'Y' or 'M' to include support for Echoaudio Indigo DJ. 369 370 To compile this driver as a module, choose M here: the module 371 will be called snd-indigodj 372 373config SND_EMU10K1 374 tristate "Emu10k1 (SB Live!, Audigy, E-mu APS)" 375 depends on SND 376 select FW_LOADER 377 select SND_HWDEP 378 select SND_RAWMIDI 379 select SND_AC97_CODEC 380 help 381 Say Y to include support for Sound Blaster PCI 512, Live!, 382 Audigy and E-mu APS (partially supported) soundcards. 383 384 The confusing multitude of mixer controls is documented in 385 <file:Documentation/sound/alsa/SB-Live-mixer.txt> and 386 <file:Documentation/sound/alsa/Audigy-mixer.txt>. 387 388 To compile this driver as a module, choose M here: the module 389 will be called snd-emu10k1. 390 391config SND_EMU10K1X 392 tristate "Emu10k1X (Dell OEM Version)" 393 depends on SND 394 select SND_AC97_CODEC 395 select SND_RAWMIDI 396 help 397 Say Y here to include support for the Dell OEM version of the 398 Sound Blaster Live!. 399 400 To compile this driver as a module, choose M here: the module 401 will be called snd-emu10k1x. 402 403config SND_ENS1370 404 tristate "(Creative) Ensoniq AudioPCI 1370" 405 depends on SND 406 select SND_RAWMIDI 407 select SND_PCM 408 help 409 Say Y here to include support for Ensoniq AudioPCI ES1370 chips. 410 411 To compile this driver as a module, choose M here: the module 412 will be called snd-ens1370. 413 414config SND_ENS1371 415 tristate "(Creative) Ensoniq AudioPCI 1371/1373" 416 depends on SND 417 select SND_RAWMIDI 418 select SND_AC97_CODEC 419 help 420 Say Y here to include support for Ensoniq AudioPCI ES1371 chips and 421 Sound Blaster PCI 64 or 128 soundcards. 422 423 To compile this driver as a module, choose M here: the module 424 will be called snd-ens1371. 425 426config SND_ES1938 427 tristate "ESS ES1938/1946/1969 (Solo-1)" 428 depends on SND 429 select SND_OPL3_LIB 430 select SND_MPU401_UART 431 select SND_AC97_CODEC 432 help 433 Say Y here to include support for soundcards based on ESS Solo-1 434 (ES1938, ES1946, ES1969) chips. 435 436 To compile this driver as a module, choose M here: the module 437 will be called snd-es1938. 438 439config SND_ES1968 440 tristate "ESS ES1968/1978 (Maestro-1/2/2E)" 441 depends on SND 442 select SND_MPU401_UART 443 select SND_AC97_CODEC 444 help 445 Say Y here to include support for soundcards based on ESS Maestro 446 1/2/2E chips. 447 448 To compile this driver as a module, choose M here: the module 449 will be called snd-es1968. 450 451config SND_FM801 452 tristate "ForteMedia FM801" 453 depends on SND 454 select SND_OPL3_LIB 455 select SND_MPU401_UART 456 select SND_AC97_CODEC 457 help 458 Say Y here to include support for soundcards based on the ForteMedia 459 FM801 chip. 460 461 To compile this driver as a module, choose M here: the module 462 will be called snd-fm801. 463 464config SND_FM801_TEA575X_BOOL 465 bool "ForteMedia FM801 + TEA5757 tuner" 466 depends on SND_FM801 467 help 468 Say Y here to include support for soundcards based on the ForteMedia 469 FM801 chip with a TEA5757 tuner connected to GPIO1-3 pins (Media 470 Forte SF256-PCS-02) into the snd-fm801 driver. 471 472 This will enable support for the old V4L1 API. 473 474config SND_FM801_TEA575X 475 tristate 476 depends on SND_FM801_TEA575X_BOOL 477 default SND_FM801 478 select VIDEO_V4L1 479 select VIDEO_DEV 480 481config SND_HDA_INTEL 482 tristate "Intel HD Audio" 483 depends on SND 484 select SND_PCM 485 help 486 Say Y here to include support for Intel "High Definition 487 Audio" (Azalia) motherboard devices. 488 489 To compile this driver as a module, choose M here: the module 490 will be called snd-hda-intel. 491 492config SND_HDSP 493 tristate "RME Hammerfall DSP Audio" 494 depends on SND 495 select SND_HWDEP 496 select SND_RAWMIDI 497 select SND_PCM 498 help 499 Say Y here to include support for RME Hammerfall DSP Audio 500 soundcards. 501 502 To compile this driver as a module, choose M here: the module 503 will be called snd-hdsp. 504 505config SND_HDSPM 506 tristate "RME Hammerfall DSP MADI" 507 depends on SND 508 select SND_HWDEP 509 select SND_RAWMIDI 510 select SND_PCM 511 help 512 Say Y here to include support for RME Hammerfall DSP MADI 513 soundcards. 514 515 To compile this driver as a module, choose M here: the module 516 will be called snd-hdspm. 517 518config SND_ICE1712 519 tristate "ICEnsemble ICE1712 (Envy24)" 520 depends on SND 521 select SND_MPU401_UART 522 select SND_AC97_CODEC 523 help 524 Say Y here to include support for soundcards based on the 525 ICE1712 (Envy24) chip. 526 527 Currently supported hardware is: M-Audio Delta 1010(LT), 528 DiO 2496, 66, 44, 410, Audiophile 24/96; Digigram VX442; 529 TerraTec EWX 24/96, EWS 88MT, 88D, DMX 6Fire, Phase 88; 530 Hoontech SoundTrack DSP 24/Value/Media7.1; Event EZ8. 531 532 To compile this driver as a module, choose M here: the module 533 will be called snd-ice1712. 534 535config SND_ICE1724 536 tristate "ICE/VT1724/1720 (Envy24HT/PT)" 537 depends on SND 538 select SND_MPU401_UART 539 select SND_AC97_CODEC 540 help 541 Say Y here to include support for soundcards based on 542 ICE/VT1724/1720 (Envy24HT/PT) chips. 543 544 Currently supported hardware is: AMP AUDIO2000; M-Audio 545 Revolution 7.1; TerraTec Aureon 5.1 Sky, 7.1 Space/Universe; 546 AudioTrak Prodigy 7.1; Pontis MS300; Albatron K8X800 Pro II; 547 Chaintech ZNF3-150/250. 548 549 To compile this driver as a module, choose M here: the module 550 will be called snd-ice1724. 551 552config SND_INTEL8X0 553 tristate "Intel/SiS/nVidia/AMD/ALi AC97 Controller" 554 depends on SND 555 select SND_AC97_CODEC 556 help 557 Say Y here to include support for the integrated AC97 sound 558 device on motherboards with Intel/SiS/nVidia/AMD chipsets, or 559 ALi chipsets using the M5455 Audio Controller. (There is a 560 separate driver for ALi M5451 Audio Controllers.) 561 562 To compile this driver as a module, choose M here: the module 563 will be called snd-intel8x0. 564 565config SND_INTEL8X0M 566 tristate "Intel/SiS/nVidia/AMD MC97 Modem" 567 depends on SND 568 select SND_AC97_CODEC 569 help 570 Say Y here to include support for the integrated MC97 modem on 571 motherboards with Intel/SiS/nVidia/AMD chipsets. 572 573 To compile this driver as a module, choose M here: the module 574 will be called snd-intel8x0m. 575 576config SND_KORG1212 577 tristate "Korg 1212 IO" 578 depends on SND 579 select SND_PCM 580 help 581 Say Y here to include support for Korg 1212IO soundcards. 582 583 To compile this driver as a module, choose M here: the module 584 will be called snd-korg1212. 585 586config SND_MAESTRO3 587 tristate "ESS Allegro/Maestro3" 588 depends on SND 589 select SND_AC97_CODEC 590 help 591 Say Y here to include support for soundcards based on ESS Maestro 3 592 (Allegro) chips. 593 594 To compile this driver as a module, choose M here: the module 595 will be called snd-maestro3. 596 597config SND_MIXART 598 tristate "Digigram miXart" 599 depends on SND 600 select SND_HWDEP 601 select SND_PCM 602 help 603 If you want to use Digigram miXart soundcards, say Y here and 604 read <file:Documentation/sound/alsa/MIXART.txt>. 605 606 To compile this driver as a module, choose M here: the module 607 will be called snd-mixart. 608 609config SND_NM256 610 tristate "NeoMagic NM256AV/ZX" 611 depends on SND 612 select SND_AC97_CODEC 613 help 614 Say Y here to include support for NeoMagic NM256AV/ZX chips. 615 616 To compile this driver as a module, choose M here: the module 617 will be called snd-nm256. 618 619config SND_PCXHR 620 tristate "Digigram PCXHR" 621 depends on SND 622 select SND_PCM 623 select SND_HWDEP 624 help 625 Say Y here to include support for Digigram PCXHR boards. 626 627 To compile this driver as a module, choose M here: the module 628 will be called snd-pcxhr. 629 630config SND_RIPTIDE 631 tristate "Conexant Riptide" 632 depends on SND 633 select FW_LOADER 634 select SND_OPL3_LIB 635 select SND_MPU401_UART 636 select SND_AC97_CODEC 637 help 638 Say 'Y' or 'M' to include support for Conexant Riptide chip. 639 640 To compile this driver as a module, choose M here: the module 641 will be called snd-riptide 642 643config SND_RME32 644 tristate "RME Digi32, 32/8, 32 PRO" 645 depends on SND 646 select SND_PCM 647 help 648 Say Y to include support for RME Digi32, Digi32 PRO and 649 Digi32/8 (Sek'd Prodif32, Prodif96 and Prodif Gold) audio 650 devices. 651 652 To compile this driver as a module, choose M here: the module 653 will be called snd-rme32. 654 655config SND_RME96 656 tristate "RME Digi96, 96/8, 96/8 PRO" 657 depends on SND 658 select SND_PCM 659 help 660 Say Y here to include support for RME Digi96, Digi96/8 and 661 Digi96/8 PRO/PAD/PST soundcards. 662 663 To compile this driver as a module, choose M here: the module 664 will be called snd-rme96. 665 666config SND_RME9652 667 tristate "RME Digi9652 (Hammerfall)" 668 depends on SND 669 select SND_PCM 670 help 671 Say Y here to include support for RME Hammerfall (RME 672 Digi9652/Digi9636) soundcards. 673 674 To compile this driver as a module, choose M here: the module 675 will be called snd-rme9652. 676 677config SND_SONICVIBES 678 tristate "S3 SonicVibes" 679 depends on SND 680 select SND_OPL3_LIB 681 select SND_MPU401_UART 682 select SND_AC97_CODEC 683 help 684 Say Y here to include support for soundcards based on the S3 685 SonicVibes chip. 686 687 To compile this driver as a module, choose M here: the module 688 will be called snd-sonicvibes. 689 690config SND_TRIDENT 691 tristate "Trident 4D-Wave DX/NX; SiS 7018" 692 depends on SND 693 select SND_MPU401_UART 694 select SND_AC97_CODEC 695 help 696 Say Y here to include support for soundcards based on Trident 697 4D-Wave DX/NX or SiS 7018 chips. 698 699 To compile this driver as a module, choose M here: the module 700 will be called snd-trident. 701 702config SND_VIA82XX 703 tristate "VIA 82C686A/B, 8233/8235 AC97 Controller" 704 depends on SND 705 select SND_MPU401_UART 706 select SND_AC97_CODEC 707 help 708 Say Y here to include support for the integrated AC97 sound 709 device on motherboards with VIA chipsets. 710 711 To compile this driver as a module, choose M here: the module 712 will be called snd-via82xx. 713 714config SND_VIA82XX_MODEM 715 tristate "VIA 82C686A/B, 8233 based Modems" 716 depends on SND 717 select SND_AC97_CODEC 718 help 719 Say Y here to include support for the integrated MC97 modem on 720 motherboards with VIA chipsets. 721 722 To compile this driver as a module, choose M here: the module 723 will be called snd-via82xx-modem. 724 725config SND_VX222 726 tristate "Digigram VX222" 727 depends on SND 728 select SND_VX_LIB 729 help 730 Say Y here to include support for Digigram VX222 soundcards. 731 732 To compile this driver as a module, choose M here: the module 733 will be called snd-vx222. 734 735config SND_YMFPCI 736 tristate "Yamaha YMF724/740/744/754" 737 depends on SND 738 select FW_LOADER 739 select SND_OPL3_LIB 740 select SND_MPU401_UART 741 select SND_AC97_CODEC 742 help 743 Say Y here to include support for Yamaha PCI audio chips - 744 YMF724, YMF724F, YMF740, YMF740C, YMF744, YMF754. 745 746 To compile this driver as a module, choose M here: the module 747 will be called snd-ymfpci. 748 749config SND_AC97_POWER_SAVE 750 bool "AC97 Power-Saving Mode" 751 depends on SND_AC97_CODEC && EXPERIMENTAL 752 default n 753 help 754 Say Y here to enable the aggressive power-saving support of 755 AC97 codecs. In this mode, the power-mode is dynamically 756 controlled at each open/close. 757 758 The mode is activated by passing power_save=1 option to 759 snd-ac97-codec driver. You can toggle it dynamically over 760 sysfs, too. 761 762endmenu 763