ഒരു പേരിലെന്തിരിക്കുന്നു!

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Fedora 16 / Windows 7 - Dual booting with GRUB2

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Fedora 16 was released almost a month back. This is the first Fedora release to have switched to the GRUB2 boot loader. I had some trouble installing Fedora 16 - the boot loader won't get installed on my MBR since there wasn't enough space to accommodate the boot image. The details of my struggles can probably be the subject of another post. Here, it must suffice to say that I had nuked my first partition, containing Windows 7, to make sufficient space (unallocated sectors) at the beginning of the HDD for grub2 boot image. After installing F16, I reinstalled Windows 7 on to the first partition on the HDD. Everything was fine, except, unsurprisingly, that it replaced grub2 boot loader with its own. Getting back grub2 to boot Fedora was a matter of doing this: Boot using Fedora 16 DVD Select 'Troubleshoot' and use the 'rescue mode' Let Anaconda autodetect existing Linux installations, and when prompted, select your F16 installation from among the multi...
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Fedora 16 - Uninstall proprietary Nvidia driver and switch back to Nouveau

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If you have an Nvidia graphics card, then one of the first things you'd probably do after installing Fedora is to disable nouveau driver and install the Nvidia proprietary driver. The easiest way to do this is using the packages from RPMFusion . But if you happen to be unlucky like me, you'd have KDE apps (and some others too) crashing all around the place with this proprietary Nvidia driver. Apparently, there's some compatibility problem between glibc and the Nvidia driver. Switching back to nouveau is the best way out. Here's how to uninstall the proprietary Nvidia driver from RPMFusion and get back to nouveau driver. Switch to a terminal by pressing Ctrl+Alt+F3 and login as 'root' Switch to runlevel 3 (terminate X): init 3 Get a list of all nvidia packages installed: yum list installed "*nvidia*" Remove these packages. Use the following sample command: yum remove kmod-nvidia kmod-nvidia-PAE nvidia-settings nvidia-xconfig xorg-x11-drv-n...
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The woes of structure packing - #pragma pack

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We were developing an application on Red Hat Enterprise Linux 5.3 that, among other things, needed to use a PCI interface card for acquiring IRIG-B time codes. The Qt 4.5 based application was first developed without this capability, and later the device driver API was integrated to it. The API had a header file with a class declaration and a corresponding source file containing definitions of the class functions. Integrating the API involved adding these two files to the list of the project's source files and making calls to the API functions. This integration caused the application to abruptly crash after receiving SIGABRT signal. The reason reported was along the lines of: “ *** glibc detected *** application_name: malloc(): memory corruption: 0x092a51c8 *** ”. Being a memory error, we used Valgrind to locate any memory access violations. We found that the crash always happened at a single statement that dynamically allocated memory using operator new. The statement ...
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