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升级到Ubuntu Intrepid后感觉到的一些变化

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第一,一台服务器,双网卡,配置两个ip地址,这两个ip地址同属一个网段,因此网关设置为相同。升级前一切正常,升级后只能让同网段的其它机器ping通,其它网段机器即使防火墙规则允许也ping不通,去掉其中一个ip地址的网关设置后就可以了。

第二是和mysql相关的怪怪的问题,以前mysql设置中都有一项:

innodb_flush_log_at_trx_commit=1

升级后,一台P4 1.7 256M内存的机器insert数据正常,另外一台IBM x3650 双5160 3.0GHz cpu 4G内存机器的insert却极慢(10条数据要5秒),不光是比以前Feisty慢,比刚才那台P4机器都要慢很多倍。将此项值调整为2以后恢复正常,insert 1000条数据耗时0.25秒左右。P4机器也将此值调整为2后有改进,但不如x3650明显,insert 1000条数据耗时5秒多。

第三,登录后欢迎屏幕里的那个系统信息我很喜欢:

  System information as of Tue Jan  6 23:50:02 CST 2009

  System load:    0.0                Memory usage: 77%   Processes:       118
  Usage of /home: 19.4% of 24.03GB   Swap usage:   34%   Users logged in: 3

如果没有出现,把landscape-common这个包装上,并且平时可以用landscape-sysinfo命令调出类似信息。

Update @ 2009-01-13

字体问题又出现了,网上有很多修改文泉驿字体的方法,我则是/etc/fonts/conf.avail44-wqy-zenhei.conf69-language-selector-zh-cn.confWenQuanYi Zen HeiWenQuanYi Bitmap Song前面加上Simsun,字体倒是还是原样(默认宋体),但firefox和其它X程序有时候字体乱成一片,也有说像墨点或者重叠的,反正鼠标选中后就恢复了,有人说是驱动的问题,把nvidia-glx-96换成nvidia-glx-71干脆X就起不来了,其它的173 177 180根本就不支持我的GForce4 MX440。

如果不换Simsun,用网上的方法调整一下文泉驿字体的处理方式,倒是不乱,但字体略显模糊,还能接受。但其它X程序依然有时文字是乱的。查到可能是显卡驱动的问题,只能等待了?

另外注意一点,nvidia-glx-??安装后必须重启系统,只重启X是不起作用的。

Update @ 2009-01-16

旧IBM本本,raedon9000的显卡,fglrx不支持,所以卸掉xorg-driver-fglrx后X能起来了,但登录界面无法输入,并且小红点失效,reinstall xserver-xorg-vesa后dpkg-reconfigure xserver-xorg后好了。总体来说反而比N卡好配。

Update @ 2009-02-08

如果安装nvidia显卡驱动时出现这样的错误:

  dpkg-divert: `diversion of /usr/lib/xorg/modules/extensions/libGLcore.so to /usr/lib/nvidia/libGLcore.so.xlibmesa by nvidia-glx-96' clashes with `diversion of /usr/lib/xorg/modules/extensions/libGLcore.so to /usr/lib/nvidia/libGLcore.so.xlibmesa by nvidia-glx-71'
  dpkg: error processing /var/cache/apt/archives/nvidia-glx-96_96.43.09-0ubuntu1.1_i386.deb (--unpack):
   subprocess pre-installation script returned error exit status 2
  Errors were encountered while processing:
   /var/cache/apt/archives/nvidia-glx-96_96.43.09-0ubuntu1.1_i386.deb
  E: Sub-process /usr/bin/dpkg returned an error code (1)

可以试着用dpkg-divert --list|grep GL找到libGLcore.so相关的内容,可能会定义到另外一个包里了:

$ dpkg-divert --list|grep GL
diversion of /usr/lib/xorg/modules/extensions/libGLcore.so to /usr/lib/nvidia/libGLcore.so.xlibmesa by nvidia-glx-71
diversion of /usr/lib/libGL.so.1 to /usr/lib/nvidia/libGL.so.1.xlibmesa by nvidia-glx-96
diversion of /usr/lib/libGL.so.1.2 to /usr/lib/nvidia/libGL.so.1.2.xlibmesa by nvidia-glx-96

可以看出是nvidia-glx-71没删干净,在这里手工清除就可以了:

$ sudo dpkg-divert --remove /usr/lib/xorg/modules/extensions/libGLcore.so
Removing `diversion of /usr/lib/xorg/modules/extensions/libGLcore.so to /usr/lib/nvidia/libGLcore.so.xlibmesa by nvidia-glx-71'

Update @ 2009-02-09

ati的驱动也出问题了,rv3??核心的显卡全不支持,比如我的Radeon X600,暂时只能删掉fglrx,用其它的驱动替代。删除xorg-driver-fglrx相关的包,装上xserver-xorg-video-ati,然后sudo dpkg-reconfigure xserver-xorg,生成了一个极小的xorg.conf,图形就有了,但据说3D性能几乎没有,办公用没啥大事。

Section "Device"
    Identifier  "Configured Video Device"
    Option      "UseFBDev"      "true"
EndSection

Section "Monitor"
    Identifier  "Configured Monitor"
EndSection

Section "Screen"
    Identifier  "Default Screen"
    Monitor     "Configured Monitor"
    Device      "Configured Video Device"
EndSection

Firefox工具栏的自定义设置总是丢失的问题原因也找到了,可以暂时禁用TabMixPlus扩展,或者是禁用Ubuntu Firefox Modifications,我选择后者。

字体也有一点小问题,比如方正小标宋的“黑体”效果就没有了,重新刷新一下fc-cache -fv就好了。


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