Messages in this thread |  | | From | "Javier Vizcaino" <> | Subject | PROBLEM: virtual terminal output to wrong destination | Date | Tue, 18 Sep 2001 18:03:41 +0200 |
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PROBLEM: virtual terminal output to wrong destination
Hi.
The following can range from two simultaneous bugs in two differente kernel modules, to something missing in the switching of virtual terminals (Alt+Fx), till to something the human mind can't, and shouldn't, understand.
Briefly, these are the two modules affected: -mgacon.c: 25 lines text virtual terminal on text monochrome adapters. -hgafb.c: framebuffer virtual terminal on Hercules monochrome graphic adapters. In both cases, virtual terminal output towards these cards appear on other in a situation that follows.
What I have is: -SuSE 7.0 with kernel 2.4.7. -Primary: S3 AGP (no fb). -Secondary: Matrox Mystique 220 PCI (using fb, module matroxfb_base). -Other: clone Hercules MDA ISA (using mdacon, and hgafb (fb)). -19" (AGP) and 14" (PCI) color monitors, and a monochrome monitor (ISA). -tty1 to tty6 will be conventional text vt's on S3 AGP (no framebuffer), tty7 wil be for X (not used here), tty8 to tty11 will be framebuffer vt's, and tty12 will be for mdacon (text 25 lines). -Modules to load will be matroxfb_base, mdacon and hgafb; these last two have the problems (virtual terminal output appears on Matrox). As reported by ver_linux: Linux capricho 2.4.7 #15 Tue Sep 18 10:34:16 CEST 2001 i686 unknown Gnu C 2.95.2 Gnu make 3.79.1 binutils 2.9.5.0.24 util-linux 2.10m mount 2.10m modutils 2.4.2 e2fsprogs 1.18 PPP 2.3.11 Linux C Library x 1 root root 4071014 Dec 30 2000 /lib/libc.so.6 Dynamic linker (ldd) 2.1.3 Procps 2.0.6 Net-tools 1.56 Kbd 0.99 Sh-utils 2.0 Modules Loaded matroxfb_base matroxfb_DAC1064 matroxfb_accel fbcon-cfb24 matroxfb_misc fbcon-cfb32 fbcon-cfb8 fbcon-cfb16 ide-floppy ntfs vfat fat analog ns558 gameport evdev joydev c-qcam hgafb fbcon-hga msp3400 tuner tvaudio bttv saa5249 eeprom w83781d i2c-proc i2c-viapro i2c-dev i2c-algo-bit i2c-core parport_pc plip parport 3c59x irtty 3c509 irda dsbr100 videodev keybdev mousedev hid input uhci usbcore serial
Configuration: -On /etc/lilo.conf (framebuffer tty's): ... append ="... video=vc:8-11" ... -On /etc/inittab (all tty's): ... 1:123:respawn:/sbin/mingetty --noclear tty1 2:123:respawn:/sbin/mingetty tty2 3:123:respawn:/sbin/mingetty tty3 4:123:respawn:/sbin/mingetty tty4 5:123:respawn:/sbin/mingetty tty5 6:123:respawn:/sbin/mingetty tty6 8:123:respawn:/sbin/mingetty tty8 9:123:respawn:/sbin/mingetty tty9 10:123:respawn:/sbin/mingetty tty10 11:123:respawn:/sbin/mingetty tty11 12:123:respawn:/sbin/mingetty tty12 ... -On /etc/modules.conf (options for mdacon and matroxfb): ... options mdacon mda_first_vc=12 mda_last_vc=12 options matroxfb_base dev=0 vesa=0x10C ...
How to reproduce both bugs follow (I describe them separately, since I don't know a common thing for both failures).
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--------------BUG ON mdacon.c--------------
To show the bug: -1). 'modprobe mdacon': text vt tty12 25 lines on MDA monitor. I can log in there (Alt+F12). -2). 'modprobe matroxfb_base' (with or without con2fb): fb vt's (tty8 to tty11) on Matrox. I can log in as well (Alt+F8 to Alt+F11). -3). Alt+F12 to return to vt on MDA: text appears in Matrox monitor, instead of going to MDA monitor. Cursor moves on the MDA monitor; rest is black. Letters appear on Matrox monitor with one space in between, surely because mdacon sending the text attribute byte.
So mdacon seems not to know where its output should appear.
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--------------BUG ON hgafb.c--------------
Here it is intended to make coexist framebuffer vt's on Matrox and Hercules.
I built two files to assign tty's to fb's (see above line on /etc/lilo.conf): -fbh: modprobe hgafb con2fb /dev/fb0 /dev/tty10 con2fb /dev/fb0 /dev/tty11 -fbm: modprobe matroxfb_base con2fb /dev/fb1 /dev/tty8 con2fb /dev/fb1 /dev/tty9 and proceeded step by step as follows, starting on MDA (fbh and fbm executed from tty1 on S3 AGP).
1) Execute fbh. tty10 and tty11 appear on MDA monitor, and I can log into both (well, I must guess 'login: ' appears, but 'password: ' does appear).
2) Execute fbm. tty8 and tty9 appear on Matrox monitor, and I can also log in.
3) Check lsmod: both groups of fb modules (matroxfb/hgafb and others) appear.
4) But now going back to MDA vt's tty10 and tty11 (Alt+F10, Alt+F11), MDA monitor does not change, and a mess appears in Matrox monitor: output goes erroneously there, MDA commands make no sense for Matrox, and what appears is many colored rectangles.
5) Matrox vt's still appear normally on Matrox monitor (Alt+F8, Alt+F9).
So hgafb seems not to know where its output should appear.
If trying in opposite order, Matrox then MDA (rebooting, and with two other similar files exchanging fb0<->fb1) all output goes to Matrox monitor (hgafb messed).
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HTH.
Greetings, Javier Vizcaino.
************************************ Javier Vizcaino javizca@mi.madritel.es Starting point: (-1)^(-1) = -1 Applying logarithms: (-1)*ln(-1) = ln(-1) Since ln(-1)<>0, dividing: -1 = 1
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