Slow mouse with 2.2.2/2.2.3 SMP

Gert van der Knokke (gertk@rendo.dekooi.nl)
Sat, 03 Apr 1999 17:22:49 +0000

Hi,
I wonder if anyone else has this problem:
My new system built some weeks ago has this strange behaviour:
While running X and moving the mouse it (the mouse pointer)
sometimes stops moving for a short moment and then continues
again. At the moment the mouse pointer is moving again there is
disk activity. Somehow I think it is related, maybe an IRQ
conflict or such though cat /proc/interrupts reveals nothing,
not even a single irq seems dedicated to the serial ports:

CPU0 CPU1
0: 8677098 8886969 IO-APIC-edge timer
1: 13322 13225 IO-APIC-edge keyboard
2: 0 0 XT-PIC cascade
5: 291 203 IO-APIC-edge soundblaster
10: 142167 142315 IO-APIC-level aic7xxx, aic7xxx
11: 23856 23930 IO-APIC-level eth0
13: 1 0 XT-PIC fpu
NMI: 0
ERR: 0

Kernel version: Linux ttgk 2.2.3 #2 SMP

cat /proc/cpuinfo:
(2x)
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 5
model name : Pentium II (Deschutes)
stepping : 2
cpu MHz : 349.074161
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
sep_bug : no
f00f_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep
mtrr pge mca cmov pat pse36 mmx osfxsr
bogomips : 348.98

The board is a Gigabyte GA6BXDU with 2x PII-350/512k and 128 Mb
RAM no IDE devices, just SCSI:
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: DEC Model: RZ28 (C) DEC Rev: 441C
Type: Direct-Access ANSI SCSI revision:
02
Host: scsi0 Channel: 00 Id: 01 Lun: 00
Vendor: SEAGATE Model: ST34371N Rev: 0484
Type: Direct-Access ANSI SCSI revision:
02
Host: scsi0 Channel: 00 Id: 03 Lun: 00
Vendor: PHILIPS Model: CDD3600 CD-R/RW Rev: 2.00
Type: CD-ROM ANSI SCSI revision:
02
Host: scsi0 Channel: 00 Id: 04 Lun: 00
Vendor: PIONEER Model: CD-ROM DR-U24X Rev: 1.01
Type: CD-ROM ANSI SCSI revision:
02
Host: scsi0 Channel: 00 Id: 05 Lun: 00
Vendor: WangDAT Model: Model 1300 Rev: 02.0
Type: Sequential-Access ANSI SCSI revision:
01

The mouse is connected to serial port ttyS2 and has its own irq
(7 or 9, have to check the board)
the lp ports don't use irqs (polling)

The system runs, apart from this problem, fine and completely
stable, tested with 2.2.2 and 2.2.3, just this mouse thing is
annoying me. The mouse movement is also quite 'sluggish'.
The Linux distribution I'm running is RH (upgraded several times
to 5.2 now) and the mouse problem didn't exist when I still had
the Asus board with AMD-K6-233. (Same IO card(s) and SCSI
devices, then on AHA2940UW adapter)

Gert

--
======================================================================
=  LINUX = Unix The Next Generation
................................ =
=  gertk@rendo.dekooi.nl             running Linux on Intel and
Alpha  =
======================================================================








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