> Hello,
>
> I decided to try XFree86 4.1.0, but it won't start; the X server hangs
> during keyboard initialization. The following backtrace is from a
> recent CVS version:
>
> (gdb) bt
> #0 0x80a8fc0 in inb (port=100)
> at ../../../../../../programs/Xserver/hw/xfree86/common/compiler.h:1135
> #1 0x80a8dff in xf86SetKbdRepeat (rad=32 ' ') at lnx_io.c:197
> #2 0x808fb91 in xf86InitKBD (init=1) at xf86Io.c:246
> #3 0x808fd8c in xf86KbdProc (pKeyboard=0x8372518, what=0) at xf86Io.c:338
> #4 0x80cc2eb in InitAndStartDevices () at devices.c:169
> #5 0x80e3728 in main (argc=1, argv=0xbffffccc, envp=0xbffffcd4) at main.c:403
>
> It hangs in this loop:
>
> while ((inb(0x64) & 2) == 2); /* wait */
>
> I guess that line is trying to read something from an AT keyboard, but
> I don't have one... 4.0.3 did not have this problem.
>
> Just putting a 'return' before the infinite loop fixes the problem,
> and I can also use my USB keyboard. But I don't believe this is a good
> fix... :)
>
> What's a good solution?
>
> Regards,
>
> Pontus
>
(This issue may have been discussed before, but I
wasn't able to find it in a quick scan of my archives.
My apologies if I duplicate any information previously
discussed.)
What type of hardware are you using?
This problem can arise if you are talking to a USB
keyboard on a system without a PS/2 controller.
The attached patch should address this. Unfortunately,
it's not based on the latest snapshot of that
file, so someone could have already applied a similar
fix, or the line numbers could be slightly off.
It essentially adds a countdown to the 'while' loops in
xf86SetKbdRepeat() so that it doesn't spin forever.
Let me know if this works.
-paul
---------------------------------------------------------------------------
--- xc-orig/programs/Xserver/hw/xfree86/os-support/linux/lnx_io.c Fri Aug 3
16:12:41 2001
+++ xc/programs/Xserver/hw/xfree86/os-support/linux/lnx_io.c Mon Aug 6 12:08:54
+2001
@@ -34,6 +34,8 @@
#include "xf86Priv.h"
#include "xf86_OSlib.h"
+#define KBC_TIMEOUT 250 /* Timeout in ms for sending to keyboard controller */
+
void
xf86SoundKbdBell(int loudness, int pitch, int duration)
{
@@ -140,6 +142,7 @@
#endif
{
int i;
+ int timeout;
int value = 0x7f; /* Maximum delay with slowest rate */
#ifdef __sparc__
@@ -194,9 +197,14 @@
break;
}
- while ((inb(0x64) & 2) == 2); /* wait */
+ timeout = KBC_TIMEOUT;
+ while (((inb(0x64) & 2) == 2) && --timeout)
+ usleep(1000); /* wait */
+
outb(0x60, 0xf3); /* set typematic rate */
- while ((inb(0x64) & 2) == 2); /* wait */
+ while (((inb(0x64) & 2) == 2) && --timeout)
+ usleep(1000); /* wait */
+
usleep(10000);
outb(0x60, value);
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