* Re: Re: psmouse.c, throwing 3 bytes away
[not found] ` <20040208233052.GA17570-+ZI9xUNit7I@public.gmane.org>
@ 2004-02-09 12:43 ` roychris
2004-02-09 15:12 ` roychris
1 sibling, 0 replies; 4+ messages in thread
From: roychris @ 2004-02-09 12:43 UTC (permalink / raw)
To: Vojtech Pavlik
Cc: Bernd Schubert, linux-kernel-u79uwXL29TY76Z2rM5mHXA,
acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f
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I resolved this problem. It's the fault of the multiplexing on i8042.
You must pass i8042_nomux=1 to the kernel for 2.4.X or 2.6.0 or you must
modify
linux-2.6.x/drivers/input/serio/i8042.c by quoting many lines if > 2.6.0
because nomux doesn't work :
/* if (!i8042_noaux && !i8042_check_aux(&i8042_aux_values)) {
if (!i8042_nomux && !i8042_check_mux(&i8042_aux_values))
for (i = 0; i < 4; i++) {
i8042_init_mux_values(i8042_mux_values +
i, i804
2_mux_port + i, i);
i8042_port_register(i8042_mux_values +
i, i8042_
mux_port + i);
}
else
*/
i8042_port_register(&i8042_aux_values, &i8042_aux_port);
// }
I know it's a very bad way to solve the problem but it's working and I
don't have more time.
Vojtech Pavlik a écrit :
>On Mon, Feb 09, 2004 at 12:03:14AM +0100, Bernd Schubert wrote:
>
>
>
>>On Sun, Feb 08, 2004 at 11:19:32PM +0100, aeriksson-97jfqw80gc6171pxa8y+qA@public.gmane.org wrote:
>>
>>
>>>>>Problem still occurs :-(
>>>>>
>>>>>
>>>>I have good news - I've managed to reliably reproduce the bug on my
>>>>machine and that means I now have a good chance to find and fix it.
>>>>
>>>>
>>>>
>>>Another data point. I just tried switching to a non-preempt kernel as
>>>was suggested by someone. The problem still occurs.
>>>
>>>
>
>
>
>>Hello,
>>
>>on IBM Thinkpads R31 this is also easiliy to reproduce:
>>
>>For 2.6. one only needs to read from /proc/apm or /proc/acpic/...
>>and the mouse becomes crazy and one gets the throwing 2 bytes away
>>messages in the log files. By fast reading in an endless loop even
>>input from the keyboard is ignored.
>>
>>For 2.4. this only happens on reading from /proc/apm, somehow acpi is not
>>affected in 2.4. kernel versions.
>>
>>Well, for R31's it is said that it is the bad bios, but maybe its
>>related? Any ideas why it doesn't happen with acpi and 2.4.?
>>
>>
>
>There are many reasons why it can happen. I'm currently debugging the
>one where no APM or ACPI or anything else is needed.
>
>
>
>>My knowlege of the kernel interals is quite low and pretty much limited
>>to the basic vfs area, so could you please give me some good advises how to
>>debug this?
>>
>>
>
>You can enable DEBUG in i8042.c, and then look at 'dmesg' when the
>problem happens. There will be a missing byte in the stream ...
>
>
>
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^ permalink raw reply [flat|nested] 4+ messages in thread* Re: Re: psmouse.c, throwing 3 bytes away
[not found] ` <20040208233052.GA17570-+ZI9xUNit7I@public.gmane.org>
2004-02-09 12:43 ` roychris
@ 2004-02-09 15:12 ` roychris
1 sibling, 0 replies; 4+ messages in thread
From: roychris @ 2004-02-09 15:12 UTC (permalink / raw)
To: Vojtech Pavlik
Cc: Bernd Schubert, acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f
[-- Attachment #1: Type: text/plain, Size: 2588 bytes --]
I resolved this problem. It's the fault of the multiplexing on i8042.
You must pass i8042_nomux=1 to the kernel for 2.4.X or 2.6.0 or you must
modify
linux-2.6.x/drivers/input/serio/i8042.c by quoting many lines if > 2.6.0
because nomux doesn't work :
/* if (!i8042_noaux && !i8042_check_aux(&i8042_aux_values)) {
if (!i8042_nomux && !i8042_check_mux(&i8042_aux_values))
for (i = 0; i < 4; i++) {
i8042_init_mux_values(i8042_mux_values +
i, i804
2_mux_port + i, i);
i8042_port_register(i8042_mux_values +
i, i8042_
mux_port + i);
}
else
*/
i8042_port_register(&i8042_aux_values, &i8042_aux_port);
// }
I know it's a very bad way to solve the problem but it's working and I
don't have more time.
Vojtech Pavlik a écrit :
>On Mon, Feb 09, 2004 at 12:03:14AM +0100, Bernd Schubert wrote:
>
>
>
>>On Sun, Feb 08, 2004 at 11:19:32PM +0100, aeriksson-97jfqw80gc6171pxa8y+qA@public.gmane.org wrote:
>>
>>
>>>>>Problem still occurs :-(
>>>>>
>>>>>
>>>>I have good news - I've managed to reliably reproduce the bug on my
>>>>machine and that means I now have a good chance to find and fix it.
>>>>
>>>>
>>>>
>>>Another data point. I just tried switching to a non-preempt kernel as
>>>was suggested by someone. The problem still occurs.
>>>
>>>
>
>
>
>>Hello,
>>
>>on IBM Thinkpads R31 this is also easiliy to reproduce:
>>
>>For 2.6. one only needs to read from /proc/apm or /proc/acpic/...
>>and the mouse becomes crazy and one gets the throwing 2 bytes away
>>messages in the log files. By fast reading in an endless loop even
>>input from the keyboard is ignored.
>>
>>For 2.4. this only happens on reading from /proc/apm, somehow acpi is not
>>affected in 2.4. kernel versions.
>>
>>Well, for R31's it is said that it is the bad bios, but maybe its
>>related? Any ideas why it doesn't happen with acpi and 2.4.?
>>
>>
>
>There are many reasons why it can happen. I'm currently debugging the
>one where no APM or ACPI or anything else is needed.
>
>
>
>>My knowlege of the kernel interals is quite low and pretty much limited
>>to the basic vfs area, so could you please give me some good advises how to
>>debug this?
>>
>>
>
>You can enable DEBUG in i8042.c, and then look at 'dmesg' when the
>problem happens. There will be a missing byte in the stream ...
>
>
>
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