Comment 39 for bug 541595

Upgrading to precise Pangolin 12.04 has lead to problems like this on my Ubuntu pc. Its linux header documentation files that won't install because of not enough space on device:

E: /var/cache/apt/archives/linux-headers-3.2.0-24_3.2.0-24.37_all.deb: error creating directory `./usr/src/linux-headers-3.2.0-24': No space left on device
E: /var/cache/apt/archives/linux-headers-3.2.0-24-generic_3.2.0-24.37_i386.deb: error creating directory `./usr/src/linux-headers-3.2.0-24-generic': No space left on device
E: /var/cache/apt/archives/linux-headers-3.2.0-24-generic-pae_3.2.0-24.37_i386.deb: error creating directory `./usr/src/linux-headers-3.2.0-24-generic-pae': No space left on device

 df shows /usr to be:
df /usr
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sda5 4504400 3917004 361624 92% /usr

But, sda5, mounted as root or /, shows to be only half full by GParted, where /usr is.

Disk Usage Analyzer shows / to be 100% where /usr is at 41.5%. Looks like Ubuntu Linux 12.04 isn't being smart about how much hard space is really left.

 And, another anomaly is df /proc:
df /proc
Filesystem 1K-blocks Used Available Use% Mounted on
proc 0 0 0 - /proc

 Where /proc does have a lot of stuff in it.

 This /usr not having enough space issue is also leading to app-port problems where processes are failing from broken pipes. And, weird behaviors where control is lost and app windows go blank. Only a Terminal issued shutdown works where no gui control is, there.