[lm-sensors] dme1737 0-002e: Write to register 0x30 failed!

Juerg Haefliger juergh at gmail.com
Mon Oct 1 23:39:44 CEST 2007


Hi Juergen,


On 10/1/07, Juergen Bausa <Juergen.Bausa at web.de> wrote:
> Hi Juerg,
>
> > Von: "Juerg Haefliger" <juergh at gmail.com>
> >
> > On 9/25/07, Juergen Bausa <Juergen.Bausa at web.de> wrote:
> > > What does this mean (taken from /var/log/messages)?
> > >
> > > Sep 23 12:11:22 lisa kernel: dme1737 0-002e: Write to register 0x30 failed! Please report to the driver maintainer.
> >
> > What exactly is unclear about the message? The write fails (for
> > whatever reason). I should probably print out the return value as
> > well...
> > More interestingly is the register address. 0x30 is the current PWM
> > duty-cycle. It only gets written during driver initialization or if
> > userland does manual PWM control.
> >
> > > I get this sometimes (every some hours). I use the dme1737.ko without on my asus system
> > > (Pundit P1-AH2) with Athlon BE-2350.
> >
> > What apps are you running that touch the driver? Are you doing manual
> > PWM control?
> >
>
> I use the script fancontrol from lm-sensors, that controls the cpu-fan by pwm. It works
> fine. Maybe it somtimes fails in setting the fan speed, but can set in the next cycle.
> I newer got error messages from fancontrol.

Aha, that explains it. Can you apply the attached patch and reload the
driver? Could you also please post the output of 'lsmod'?

...juerg

--- dme1737.c.orig      2007-10-01 14:34:13.508278000 -0700
+++ dme1737.c   2007-10-01 14:35:14.041684000 -0700
@@ -493,8 +493,8 @@ static u8 dme1737_read(struct i2c_client

                if (val < 0) {
                        dev_warn(&client->dev, "Read from register "
-                                "0x%02x failed! Please report to the driver "
-                                "maintainer.\n", reg);
+                                "0x%02x failed (%d)! Please report to the "
+                                "driver maintainer.\n", reg, val);
                }
        } else { /* ISA device */
                outb(reg, client->addr);
@@ -513,8 +513,8 @@ static s32 dme1737_write(struct i2c_clie

                if (res < 0) {
                        dev_warn(&client->dev, "Write to register "
-                                "0x%02x failed! Please report to the driver "
-                                "maintainer.\n", reg);
+                                "0x%02x failed (%d)! Please report to the "
+                                "driver maintainer.\n", reg, res);
                }
        } else { /* ISA device */
                outb(reg, client->addr);




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