experimental 这个在 code maturity option没有的啊！具体在哪个选项啊！
我把GRUB里的一句改成ro root=/dev/hdb1后就可以进入系统了。
现在出现新问题，就是启动的时候出现很多错误提示：
In USB HID Interface modprobe:Can't locate module hid
............keyboard........................................................keybdev
............mouse............................................................mousedev
还有什么vfat、freevfav、ip-table错误，这些错误使我的USB猫无法用了，挂载的HDD也无法挂载。但是我在先前的XCONFIG中选了对USB的支持啊。
还有出现modprobe:modprobe:Can't locate module char-major-10-135这个提示错误，关机也有这个提示，并有soudservice -00什么错误，完了！
弄好了支持PPPOE，反而USB ADSL MODEM连识别都不行！
1) u need choose [*] Prompt for development and/or incomplete code/drivers, which is the experimental option i said before.
2) for grub 'label=/', u have to use initrd file, if u use /dev/hdbx, u can omit that file.
3)choose usb, vfat... as module, not compiled into kernel directly.
4)char-major-10-135 is /dev/rtc, choose │<M> Enhanced Real Time Clock Support in character device
5) for the soundevice.. error. post detail msg here. 一个重要的问题就是启动的时候ip-table错误始终有！
choose[*] Network packet filtering (replaces ipchains) 帮我看看上面的怪事 我现在只是对RH9原来的内核进行编译，还算好！
可是当我编译新的内核启动，就会出现很多错误，现在先搁置，把RH9原来的搞定。
有个问题，是不是每次修改过那个XCONFIG后，就要做这么多步啊，如果我仅仅改一个选项，还要重新编译吗？能不能直接安装这个模块啊？
for 2.4.x kernel
first time u compile kernel
make mrproper
make clean
make config
make dep
make bzImage
make modules
make modules_install
from sceond time
make config
make dep
make bzImage
make modules
make modules_install
这个上面还有一个，要选吗？
一个重要的问题就是启动的时候ip-table错误始终有！choose[*] Network packet filtering (replaces ipchains) IPtable这个问题，我搜索了BBS，发现这个做法，但是找不到choose iptable这个啊！
network option, choose that network filter, then go network filter option to choose iptable
choose M
还有编译出现2次不同的错误信息，而且不同哦！是在make bzImage后出现的ERROR。
还有我现在使用XCONFIG后，保存退出提示会多一句话，本来只有要你去执行MAKE DEP，现在还说什么看上层的目录里的MAKEFILE文件以及什么附加的设备（我没选附加设备啊），这是为什么？我有打make mrproper啊！
make: Entering directory `/usr/src/linux-2.4.20-8/drivers/pci'
make: *** No rule to make target `/usr/src/linux-2.4.20-8/drivers/pci/devlist.h', needed by `names.o'.Stop.
make: Leaving directory `/usr/src/linux-2.4.20-8/drivers/pci'
make: *** Error 2
make: Leaving directory `/usr/src/linux-2.4.20-8/drivers/pci'
make: *** Error 2
make: Leaving directory `/usr/src/linux-2.4.20-8/drivers'
make: *** Error 2
base.c: In function `is_devfsd_or_child':
base.c:1417: structure has no member named `p_opptr'
base.c:1417: structure has no member named `p_opptr'
base.c:1412: warning: `p' might be used uninitialized in this function
base.c: In function `devfsd_ioctl':
base.c:3433: warning: unused variable `lock'
make: *** Error 1
make: Leaving directory `/usr/src/linux-2.4.20-8/fs/devfs'
make: *** Error 2
make: Leaving directory `/usr/src/linux-2.4.20-8/fs/devfs'
make: *** Error 2
make: Leaving directory `/usr/src/linux-2.4.20-8/fs'
make: *** Error 2
[*] Network packet filtering (replaces ipchains)
IP: Netfilter Configuration--->
<M> IP tables support (required for filtering/masq/NAT) (NEW) 那2段代码是什么问题 for the error u meet, i do not have 2.4.20-8 kernel. so i can not tell u why.
:-D 惨
是不是和我选的模块有关，第一次做的时候没有，现在却出现了！
和我当中升级内核没成功，再做原来的有关系吗？ should have relationship with the module u choose. i cannot figure it out since i do not have 2.4.20-8 kernel. DEVFS
/dev： File systems -> /dev file system support (EXPERIMENTAL)
这个选项要选吗，谁帮我看看一装好RH9是否选中？ <M> Enhanced Real Time Clock Support in character device
这步还是没有找到啊，也没有发现有这个选项的！ 1)现在最主要的问题是，我的USB ADSL MODEM在原来RH9装完后，硬件浏览器里有，只是UNKONW，而且上面的2个灯亮，但是当我现在重新编译原来的内核后，MODEM根本就没有影了，灯不亮，而且在硬件浏览器里没有找到这个硬件，请问配置选项里我哪个选项没有选才造成这个问题的？
2)抱歉的很，我编译内核就是为了那个ALCATEL SPEEDTOUCH USB ADSL，但是现在编好出现这个问题，不知道时候是什么漏选了？
Aug 13 21:23:29 localhost pppd: Plugin /usr/lib/pppd/2.4.1/pppoe.so loaded.
Aug 13 21:23:29 localhost pppd: PPPoE Plugin Initialized
Aug 13 21:23:29 localhost modprobe: modprobe: Can't locate module escape
Aug 13 21:23:29 localhost modprobe: modprobe: Can't locate module escape
Aug 13 21:23:29 localhost modprobe: modprobe: Can't locate module crtscts
Aug 13 21:23:29 localhost modprobe: modprobe: Can't locate module crtscts
Aug 13 21:23:29 localhost modprobe: modprobe: Safe mode parameter starts with '-'
Aug 13 21:23:29 localhost modprobe: modprobe: Safe mode parameter starts with '-'
Aug 13 21:23:29 localhost modprobe: modprobe: Can't locate module nocrtscts
Aug 13 21:23:29 localhost modprobe: modprobe: Can't locate module nocrtscts
Aug 13 21:23:29 localhost modprobe: modprobe: Can't locate module cdtrcts
Aug 13 21:23:29 localhost modprobe: modprobe: Can't locate module cdtrcts
Aug 13 21:23:29 localhost modprobe: modprobe: Can't locate module nocdtrcts
Aug 13 21:23:29 localhost modprobe: modprobe: Can't locate module nocdtrcts
Aug 13 21:23:29 localhost modprobe: modprobe: Can't locate module xonxoff
Aug 13 21:23:29 localhost modprobe: modprobe: Can't locate module xonxoff
Aug 13 21:23:29 localhost modprobe: modprobe: Can't locate module modem
Aug 13 21:23:29 localhost modprobe: modprobe: Can't locate module modem
Aug 13 21:23:29 localhost modprobe: modprobe: Can't locate module local
Aug 13 21:23:29 localhost modprobe: modprobe: Can't locate module local
Aug 13 21:23:29 localhost modprobe: modprobe: Can't locate module sync
Aug 13 21:23:29 localhost modprobe: modprobe: Can't locate module sync
Aug 13 21:23:29 localhost modprobe: modprobe: Can't locate module vj
Aug 13 21:23:29 localhost modprobe: modprobe: Can't locate module vj
Aug 13 21:23:29 localhost pppd: Plugin /usr/lib/pppd/2.4.1/pppoe.so loaded.
Aug 13 21:23:29 localhost pppd: PPPoE Plugin Initialized
Aug 13 21:23:29 localhost modprobe: modprobe: Can't locate module lock
Aug 13 21:23:29 localhost last message repeated 2 times
Aug 13 21:23:29 localhost pppd: In file /etc/ppp/peers/ad50003078: unrecognized option 'lock'
Aug 13 21:23:39 localhost modprobe: modprobe: Can't locate module ppp0
到底什么模块啊？
3)还有这个问题：
# modprobe usb-ohci
/lib/modules/2.4.20-8custom/kernel/drivers/usb/usb-ohci.o: init_module: No such
device
Hint: insmod errors can be caused by incorrect module parameters, including invalid IO or IRQ parameters.
You may find more information in syslog or the output from dmesg
/lib/modules/2.4.20-8custom/kernel/drivers/usb/usb-ohci.o: insmod /lib/modules/2.4.20-8custom/kernel/drivers/usb/usb-ohci.o failed
/lib/modules/2.4.20-8custom/kernel/drivers/usb/usb-ohci.o: insmod usb-ohci failed
不行：—（
4)能否只编译一个模块，像PPPOE，怎么做法。请给出具体步骤，最好能编好后，当前的系统能使用，或者加在当前系统使用。
现在的问题是，这个贴子的问题已经非常乱了，我已经不能很清楚你的问题，并且也不能理清楚应该怎么回答你，你最好重新事理一下你的问题，这样便与我们理解。
对于DEVFS你不要选，选上的话你还要作许多其它的设置，但现在实在是太乱了，头痛中 :shock: 我搞定了！ <M> Enhanced Real Time Clock Support in character device
这步还是没有找到啊，也没有发现有这个选项的！
enter
Character devices--->
choose
│<*> Enhanced Real Time Clock Support
sigh, can you double check before u say can not find?