Re: [Bugme-new] [Bug 8378] New: Averatec 3156X laptop doesn't rebootwith kernels > 2.6.13.5 (responsible commit found)

[Lee Garrett]

Truxton Fulton wrote:
> Hi,
>
> I verified on my IDEQ210M that performing the old reboot sequence
> followed by the new reboot sequence works for me, and I suspect that
> it will work for Lee also.  Like this :
>
> 	/* old method, works on most machines */
>         for (i = 0; i < 100; i++) {
>                 kb_wait();
>                 udelay(50);
>                 outb(0xfe, 0x64);         /* pulse reset low */
>                 udelay(50);
>         }
>
> 	/* new method, sets the "System flag" which when set,
> 	   indicates successful completion of the keyboard controller
> 	   self-test (Basic Assurance Test, BAT).  This is needed
> 	   for some machines with no keyboard plugged in */
>         for (i = 0; i < 100; i++) {
>                 kb_wait();
>                 udelay(50);
>                 outb(0x60, 0x64);         /* write Controller Command Byte */
>                 udelay(50);
>                 kb_wait();
>                 udelay(50);
>                 outb(0x14, 0x60);         /* set "System flag" */
>                 udelay(50);
>                 kb_wait();
>                 udelay(50);
>                 outb(0xfe, 0x64);         /* pulse reset low */
>                 udelay(50);
>         }
>
> Thanks,
>
> -Truxton

Hello everyone,

I compiled a 2.6.21.1 kernel with Truxton's suggestion mentioned 
above. My laptop reboots normally with it. For convenience I've 
diffed a patch, which is appended to this mail.

Regards,
Lee
--- a/include/asm-i386/mach-default/mach_reboot.h	2007-05-11 16:12:56.000000000 +0200
+++ b/include/asm-i386/mach-default/mach_reboot.h	2007-05-11 16:13:54.000000000 +0200
@@ -19,20 +19,32 @@
 static inline void mach_reboot(void)
 {
 	int i;
-	for (i = 0; i < 10; i++) {
-		kb_wait();
-		udelay(50);
-		outb(0x60, 0x64);	/* write Controller Command Byte */
-		udelay(50);
-		kb_wait();
-		udelay(50);
-		outb(0x14, 0x60);	/* set "System flag" */
-		udelay(50);
-		kb_wait();
-		udelay(50);
-		outb(0xfe, 0x64);	/* pulse reset low */
-		udelay(50);
-	}
+	/* old method, works on most machines */
+        for (i = 0; i < 100; i++) {
+                kb_wait();
+                udelay(50);
+                outb(0xfe, 0x64);         /* pulse reset low */
+                udelay(50);
+        }
+
+	/* new method, sets the "System flag" which when set,
+	   indicates successful completion of the keyboard controller
+	   self-test (Basic Assurance Test, BAT).  This is needed
+	   for some machines with no keyboard plugged in */
+        for (i = 0; i < 100; i++) {
+                kb_wait();
+                udelay(50);
+                outb(0x60, 0x64);         /* write Controller Command Byte */
+                udelay(50);
+                kb_wait();
+                udelay(50);
+                outb(0x14, 0x60);         /* set "System flag" */
+                udelay(50);
+                kb_wait();
+                udelay(50);
+                outb(0xfe, 0x64);         /* pulse reset low */
+                udelay(50);
+        }
 }
 
 #endif /* !_MACH_REBOOT_H */