Date: Wed, 28 Feb 2007 17:46:08 +0100 From: Karol Kwiatkowski <karol.kwiat@gmail.com> To: freebsd-current@freebsd.org Subject: [SOLVED] Re: i386 kernel just stops booting Message-ID: <45E5B1D0.6030401@gmail.com> In-Reply-To: <45E44704.7080400@gmail.com> References: <45E44704.7080400@gmail.com>
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[-- Attachment #1 --] Karol Kwiatkowski wrote: > Hello everyone, > > I'm trying to get CURRENT installed on i386 desktop machine, but kernel > stops booting after some time [1]. No error, even with verbose logging. > At that point keyboard does not respond so manual reset is the only > option. Nothing is logged into dmesg or messages. > > [1] [...] > found-> vendor=0x1102, dev=0x4001, revid=0x00 > bus=2, slot=8, func=2 > class=0c-00-10, hdrtype=0x00, mfdev=1 > cmdreg=0x0116, statreg=0x0210, cachelnsz=64 (dwords) > lattimer=0x20 (960 ns), mingnt=0x02 (500 ns), maxlat=0x04 (1000 ns) > intpin=b, irq=5 > powerspec 2 supports D0 D1 D2 D3 current D0 > map[10]: type 1, range 32, base ff5ff800, size 11, enabled > pcib1: requested memory range 0xff5ff800-0xff5fffff: good > map[14]: type 1, range 32, base ff5f8000, size 14, enabled > pcib1: requested memory range 0xff5f8000-0xff5fbfff: good > pcib1: matched entry for 2.8.INTB (src \\_SB_.LNKB:0) > pci_link1: Picked IRQ 17 with weight 0 > ioapic0: Changing polarity for pin 17 to high > pcib1: slot 8 INTB routed to irq 17 via \\_SB_.LNKB > [ here it stops responding ] Gee, after few hours of looking at the sources (yeah, kernel internals newbie here :) I've found that VPD scanning is the problem. Workaround to this is to disable VPD reading by hw.pci.enable_vpd=0. Now that I know of it, I 've found it is documented in a comment for revision 1.339: http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/dev/pci/pci.c FYI, it's this code in sys/dev/pci/pci.c (rev. 1.343): % static void % pci_read_extcap(device_t pcib, pcicfgregs *cfg) [...] % case PCIY_VPD: /* PCI Vital Product Data */ % if (pci_do_vpd) { % cfg->vpd.vpd_reg = ptr; % pci_read_vpd(pcib, cfg); % } % break; Apparently this hangs while scanning PV-BT878P+ TV card (pci2:10:0) [1]. Cheers, Karol [1] PixelView PlayTV Pro PV-BT878P+ rev.9D # pciconf -vl bktr0@pci2:10:0: class=0x040000 card=0x00000000 chip=0x036e109e rev=0x11 hdr=0x00 vendor = 'Conexant (Was: Brooktree Corp)' device = 'Bt878/Fusion 878A Mediastream Controller' class = multimedia subclass = video none7@pci2:10:1: class=0x048000 card=0x00000000 chip=0x0878109e rev=0x11 hdr=0x00 vendor = 'Conexant (Was: Brooktree Corp)' device = 'Bt878/Fusion878A Video Capture (Audio Section)' class = multimedia -- Karol Kwiatkowski <karol.kwiat at gmail dot com> OpenPGP 0x06E09309 [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (FreeBSD) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFF5bHYezeoPAwGIYsRCDzmAKCWBNQaEhALabq/FEkOzMbQmbErDwCffQUE IJRXW5Jtt2MZy2tp81Aa8pU= =g0QO -----END PGP SIGNATURE-----help
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