Date: Mon, 24 Jan 2000 14:38:44 +0200 From: Maxim Sobolev <sobomax@altavista.net> To: current@freebsd.org Subject: VESA modes broken in syscons driver Message-ID: <388C47D4.50FD2100@altavista.net>
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Hi,
It seems that recent kernels have problems initialising syscons in VESA pixel
modes. Particularly "vidcontrol VESA_800x600" (actually "vidcontrol
VESA_800x600 < /dev/ttyv1" to see what's going on ttyv0) command make my kernel
panicing with the following output:
Fatal trap 18: integer divide fault while in kernel mode
instruction pointer = 0x8:0xc01baee9
stack pointer = 0x10:0xc455fc78
frame pointer = 0x10:0xc455fc84
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 176 (vidcontrol)
interrupt mask = tty
trap number = 18
panic: integer divide fault
Looking into nm /kernel output I figured that 0xc01baee9 pointer is within
sc_mouse_move procedure, however I doesn't use moused. Moreover, disabling
mouse support in syscons (SC_NO_SYSMOUSE) seems like a temporary workaround to
this bug.
-Maxim
kernel config:
device vga0 at isa? port ? conflicts
device sc0 at isa?
options VESA
options SC_PIXEL_MODE
options SC_TWOBUTTON_MOUSE
options SC_HISTORY_SIZE=1024
dmesg:
Preloaded elf kernel "kernel" at 0xc0302000.
Preloaded elf module "splash_bmp.ko" at 0xc03020a8.
Preloaded splash_image_data "/boot/chuck.bmp" at 0xc030214c.
Intel Pentium detected, installing workaround for F00F bug
VESA: information block
56 45 53 41 00 02 00 01 00 01 00 00 00 00 40 00
00 01 20 00 00 01 16 01 00 01 31 01 00 01 4a 01
00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
VESA: 20 mode(s) found
VESA: v2.0, 2048k memory, flags:0x0, mode table:0xc0242f40 (1000040)
VESA: CHIPS 6x554 Super VGA
VESA: Chips & Technologies, Inc. 6x554 Display Controller 2
splash: image@0xc028b068, size:481078
bmp_start(): splash_mode:259
splash: image decoder found: splash_bmp
vga-pci0: <Chips & Technologies model 00e4 VGA-compatible display device> mem
0xfe000000-0xfeffffff at device 4.0 on pci0
vga0: <Generic ISA VGA> at port 0x3b0-0x3df iomem 0xa0000-0xbffff on isa0
fb0: vga0, vga, type:VGA (5), flags:0x700ff
fb0: port:0x3b0-0x3df, crtc:0x3d4, mem:0xa0000 0x20000
fb0: init mode:24, bios mode:3, current mode:24
fb0: window:0xc00b8000 size:32k gran:32k, buf:0 size:32k
VGA parameters upon power-up
50 18 10 00 00 00 03 00 02 67 5f 4f 50 82 55 81
bf 1f 00 4f 0d 0e 00 00 06 e0 9c 8e 8f 28 1f 96
b9 a3 ff 00 01 02 03 04 05 14 07 38 39 3a 3b 3c
3d 3e 3f 0c 00 0f 08 00 00 00 00 00 10 0e 00 ff
VGA parameters in BIOS for mode 24
50 18 10 00 10 00 03 00 02 67 5f 4f 50 82 55 81
bf 1f 00 4f 0d 0e 00 00 00 00 9c 8e 8f 28 1f 96
b9 a3 ff 00 01 02 03 04 05 14 07 38 39 3a 3b 3c
3d 3e 3f 0c 00 0f 08 00 00 00 00 00 10 0e 00 ff
EGA/VGA parameters to be used for mode 24
50 18 10 00 10 00 03 00 02 67 5f 4f 50 82 55 81
bf 1f 00 4f 0d 0e 00 00 00 00 9c 8e 8f 28 1f 96
b9 a3 ff 00 01 02 03 04 05 14 07 38 39 3a 3b 3c
3d 3e 3f 0c 00 0f 08 00 00 00 00 00 10 0e 00 ff
sc0: <System console> on isa0
sc0: VGA <16 virtual consoles, flags=0x200>
sc0: fb0, kbd0, terminal emulator: sc (syscons terminal)
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