When the v6.0 JRE works, the font-rendering looks very good indeed - when it works. One thing I recall when I temporarily reverted to v5.0 is the reminder that the font rendering looks very "tinny" and does not appear to engage in ClearType font-smoothing - and that is why it works. Once I did that, v6.0 JRE would work and has, for now, continued to work. I then downloaded the ClearType Tuner PowerToy from Microsoft and "re-tuned" my ClearType parametrisation. Upon re-enabling ClearType, no app would run, nor would the Java Control Panel and there were no error messages - not even in a terminal window, running java from the command line. Patiently trawling Google using variant search terms, I was lucky to find a reference to "ClearType" font-smoothing in Windows O/S, I followed the suggestion and disabled ClearType and consequently v6.0 JRE worked, all apps would run, and the Java Control Panel worked as expected. To do a thorough "scorced earth" deinstall of the v6.0 JRE and then a reinstall - all to no avail.Ĭleaning, again v6.0 and then installing the latest v5.0 JRE got my Java apps running - but was not a solution since I needed the v6.0 JRE to work, so I reinstalled it and plodded along.
No error messages - a *very* obscure bug. Absolutely no indication of what was wrong - no error messages.
INSTALL4J COULD NOT FIND JAVA INSTALL
However recently I had to install v6.0 for a particular Java app and was surprised and delighted that it worked - for a few weeks - and then Java simply stopped working: I have encountered the bug previously in system builds using the v6.0 branch of the JRE, but did not discover the cause, hence usually I have reverted back to the v5.0 legacy branch of the JRE, since it worked reliably. The latter link provides some technical insight. I search the Java Bug Database but could not find anything relevant. I am an end user and not a Java Developer, so please bear with me.
INSTALL4J COULD NOT FIND JAVA UPDATE
The problem exists in JRE v6.0 Update 10 and previously. My system is Microsoft Windows XP SP2 on an IBM Thinkpad 圆0s, but the problem is probably generic to Windows OS. It's a "Moby Dick" of a bug, in that it will take down your Java installation without a trace nor explanation, never to be seen again. This Bug Report is about a very obscure bug in Font Smoothing in Windows XP (at least) concerning JRE v6.0 and "ClearType". Java HotSpot(TM) Client VM (build 14.2-b01, mixed mode, sharing) Java(TM) SE Runtime Environment (build 1.6.0_16-b01)
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