You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
42 lines
1.6 KiB
Markdown
42 lines
1.6 KiB
Markdown
# kgpe: platform-specific notes
|
|
|
|
## quirks
|
|
|
|
### hang during boot if vga enabled
|
|
|
|
If the system hangs on startup before attempting to boot the
|
|
ownerboot Linux kernel, and the last few messages you see on the
|
|
console look like the following, try disabling the on-board VGA
|
|
output (move jumper `VGA_SW1` to the two pins closest to the pci
|
|
slots):
|
|
|
|
```
|
|
...
|
|
PCI: 00:14.1 10 <- [0x0000003030 - 0x0000003037] size 0x00000008 gran 0x03 io
|
|
PCI: 00:14.1 14 <- [0x0000003048 - 0x000000304b] size 0x00000004 gran 0x02 io
|
|
PCI: 00:14.1 18 <- [0x0000003038 - 0x000000303f] size 0x00000008 gran 0x03 io
|
|
PCI: 00:14.1 1c <- [0x000000304c - 0x000000304f] size 0x00000004 gran 0x02 io
|
|
PCI: 00:14.1 20 <- [0x0000003010 - 0x000000301f] size 0x00000010 gran 0x04 io
|
|
PCI: 00:14.2 10 <- [0x00f0404000 - 0x00f0407fff] size 0x00004000 gran 0x0e mem64
|
|
PCI: 00:14.3 a0 <- [0x00f0410000 - 0x00f0410000] size 0x00000001 gran 0x00 mem
|
|
```
|
|
|
|
## watchdogs
|
|
|
|
The KGPE-D16 has *at least* three separate hardware watchdogs!
|
|
|
|
- One in the SB700 southbridge, although it appears to be disabled
|
|
(Linux's `sp5100_tco` reports that it cannot be enabled).
|
|
|
|
- One in the W83795 hardware monitor (thermal/fan control chip)
|
|
|
|
- One in the W83667HG-A SuperIO chip
|
|
|
|
I've found the third one to be most reliable. The Linux
|
|
`w83627hf_wdt` kernel module for this watchdog works correctly, and
|
|
I was able to write a coreboot patch (to be included with ownerboot)
|
|
to start the watchdog extremely early in the boot process -- before
|
|
DRAM initialization or PNP enumeration. This is extremely helpful
|
|
with unattended servers, where a hang in the boot process requires
|
|
manual power-cycling.
|