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<body><span class="vcard"><a class="email" href="mailto:guinness.meredith@gmail.com" title="Troy <guinness.meredith@gmail.com>"> <span class="fn">Troy</span></a>
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<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED NOTABUG - [NV4B] NV40 PGRAPH "unknown bits" - windows render in white"
href="https://bugs.freedesktop.org/show_bug.cgi?id=77230">bug 77230</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
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<td style="text-align:right;">Resolution</td>
<td>---
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<td>NOTABUG
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED NOTABUG - [NV4B] NV40 PGRAPH "unknown bits" - windows render in white"
href="https://bugs.freedesktop.org/show_bug.cgi?id=77230#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED NOTABUG - [NV4B] NV40 PGRAPH "unknown bits" - windows render in white"
href="https://bugs.freedesktop.org/show_bug.cgi?id=77230">bug 77230</a>
from <span class="vcard"><a class="email" href="mailto:guinness.meredith@gmail.com" title="Troy <guinness.meredith@gmail.com>"> <span class="fn">Troy</span></a>
</span></b>
<pre>Well it took a while but I eventually discovered Video Memory Test (VMT) which
is like memtest but for video ram. I downloaded the ISO version (VMTCE) from
sourceforge:
<a href="http://sourceforge.net/projects/vmtce/files/">http://sourceforge.net/projects/vmtce/files/</a>
After completing the test there were 223,834 errors.
Nice... not.
Further investigation suggests nVidia might have switched the type of solder
the year after my card was manufactured, due to high failure rates in
notebooks:
<a href="http://www.tgdaily.com/hardware-features/39045-nvidia-gpu-failures-caused-by-material-problem-sources-claim">http://www.tgdaily.com/hardware-features/39045-nvidia-gpu-failures-caused-by-material-problem-sources-claim</a>
Anyway, my problem is indeed a hardware error, most likely all those solder
joints have micro fractures.
Thanks for pointing me in the right direction.</pre>
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