Date: Tue, 24 Nov 1998 07:57:32 -0500 (EST) From: Brian Feldman <green@unixhelp.org> To: current@FreeBSD.ORG Subject: video mode switching has gone south Message-ID: <Pine.BSF.4.05.9811240700500.21608-100000@janus.syracuse.net>
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It seems (nay, it IS so) that video mode switching has gotten extremely
strange within the last few days. This is not a problem just with vidcontrol
and syscons, this affects XFree86 as well. I've got two kernels, the old one
which does not exhibit this problem, and the new one which does.
Working:
FreeBSD 3.0-CURRENT #3: Sun Nov 22 21:45:52 EST 1998
Broken:
FreeBSD 3.0-CURRENT #4: Mon Nov 23 20:11:02 EST 1998
<dmesg>
Copyright (c) 1992-1998 FreeBSD Inc.
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
FreeBSD 3.0-CURRENT #3: Sun Nov 22 21:45:52 EST 1998
green@feldman.dyn.ml.org:/usr/src/sys/compile/FELDMAN
Timecounter "i8254" frequency 1193182 Hz
Timecounter "TSC" frequency 200455956 Hz
CPU: AMD-K6tm w/ multimedia extensions (200.46-MHz 586-class CPU)
Origin = "AuthenticAMD" Id = 0x561 Stepping=1
Features=0x8001bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,MMX>
real memory = 83886080 (81920K bytes)
config> quit
avail memory = 78667776 (76824K bytes)
Preloaded elf kernel "kernel.old" at 0xf0289000.
Probing for devices on PCI bus 0:
chip0: <Intel 82437VX PCI cache memory controller> rev 0x02 on pci0.0.0
chip1: <Intel 82371SB PCI to ISA bridge> rev 0x01 on pci0.7.0
ide_pci0: <Intel PIIX3 Bus-master IDE controller> rev 0x00 on pci0.7.1
vga0: <S3 ViRGE DX/GX graphics accelerator> rev 0x01 int a irq 10 on pci0.13.0
Probing for PnP devices:
Probing for devices on the ISA bus:
VESA: v1.2, 4096k memory, flags:0x0, mode table:0xf00c4cc2 (c0004cc2)
VESA: S3 Incorporated. 86C375/86C385
sc0 at 0x60-0x6f irq 1 on motherboard
sc0: VGA color <16 virtual consoles, flags=0x0>
sio0 at 0x3f8-0x3ff irq 4 flags 0x10 on isa
sio0: type 16550A
sio1 at 0x2f8-0x2ff irq 3 on isa
sio1: type 16550A
sio3 at 0x2e8-0x2ef irq 11 on isa
sio3: type 16550A
ppc: parallel port found at 0x378
ppc0 at 0x378 irq 7 on isa
ppc0: SMC-like chipset (ECP/EPP/PS2/NIBBLE) in COMPATIBLE mode
nlpt0: <generic printer> on ppbus 0
nlpt0: Interrupt-driven port
ppi0: <generic parallel i/o> on ppbus 0
lppps0: <Pulse per second Timing Interface> on ppbus 0
plip0: <PLIP network interface> on ppbus 0
fdc0 at 0x3f0-0x3f7 irq 6 drq 2 on isa
fdc0: FIFO enabled, 8 bytes threshold
fd0: 1.44MB 3.5in
wdc0 at 0x1f0-0x1f7 irq 14 flags 0xa0ffa0ff on isa
wdc0: unit 0 (wd0): <Maxtor 71626 AP>, DMA, 32-bit, multi-block-32
wd0: 1554MB (3183264 sectors), 3158 cyls, 16 heads, 63 S/T, 512 B/S
wdc0: unit 1 (wd1): <Maxtor 71626 AP>, DMA, 32-bit, multi-block-32
wd1: 1554MB (3183264 sectors), 3158 cyls, 16 heads, 63 S/T, 512 B/S
wdc1 at 0x170-0x177 irq 15 flags 0xa0ffa0ff on isa
wdc1: unit 1 (atapi): <NEC CD-ROM DRIVE:285/3.04>, removable, dma, iordy
acd0: drive speed 2067KB/sec, 128KB cache
acd0: supported read types: CD-R, CD-DA
acd0: Audio: play, 16 volume levels
acd0: Mechanism: ejectable tray
acd0: Medium: no/blank disc inside, unlocked
sb0 at 0x220 irq 5 drq 1 on isa
snd0: <SoundBlaster 16 4.13>
sbxvi0 at ? drq 6 on isa
snd0: <SoundBlaster 16 4.13>
sbmidi0 at 0x330 on isa
snd0: <SoundBlaster MPU-401>
opl0 at 0x388 on isa
snd0: <Yamaha OPL3 FM>
joy0 at 0x201 on isa
joy0: joystick
npx0 on motherboard
npx0: INT 16 interface
IP packet filtering initialized, divert enabled, rule-based forwarding disabled, default to accept, logging disabled
changing root device to wd0s1a
ffs_mountfs: superblock updated for soft updates
ffs_mountfs: superblock updated for soft updates
ffs_mountfs: superblock updated for soft updates
</dmesg>
The kernel configuration is the same in both, except for ppc0 having flags
0x4 in the new one, which changing does not affect [the behavior of video
mode switching].
Video mode switching is defined as "any video mode changing, including
resolution changing and switching between non- and graphical screen modes," so
affects X and syscons. An example of what previously happened:
00:00 I type "xmame wb3bl", for example, which uses Xxf86dga
00:01 xmame initializes, attempts to switch to 320x240
00:02 screen blanks
00:03 320x240 screen pops up, then blanks
00:04 game shows up
15:07 I get bored and press escape
15:08 screen switches back to 1280x1024
In the newer kernel (more or less, my memory might not be great):
00:00 I type "xmame wb3bl", for example, which uses Xxf86dga
00:01 xmame initializes, attempts to switch to 320x240
00:02 screen blanks
00:05 1280x1024 screen pops back up, garbled
00:07 screen blanks
00:09 1280x1024 screen pops back up
00:12 screen blanks
00:17 320x240 screen pops up
00:19 screen blanks
00:23 game shows up
01:40 I press escape because now I'm bored of this game and FreeBSD is being
annoying
01:41 screen blanks
01:45 1280x1024 screen pops back up garbled
01:46 screen blanks
01:48 screen is back to normal
If anyone has any ideas why any of this is happening now, I'd like to hear
any possible explanations.
Brian Feldman _ __ ___ ___ ___
green@unixhelp.org _ __ ___ | _ ) __| \
http://www.freebsd.org/ _ __ ___ ____ | _ \__ \ |) |
FreeBSD: The Power to Serve! _ __ ___ ____ _____ |___/___/___/
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