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<body><span class="vcard"><a class="email" href="mailto:xavier@bachelot.org" title="Xavier Bachelot <xavier@bachelot.org>"> <span class="fn">Xavier Bachelot</span></a>
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<a class="bz_bug_link
bz_status_NEW "
title="NEW - 1600x1200 resolution breaks at startup, but works later with xrandr"
href="https://bugs.freedesktop.org/show_bug.cgi?id=87061">bug 87061</a>
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<th>What</th>
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<td>xavier@bachelot.org
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - 1600x1200 resolution breaks at startup, but works later with xrandr"
href="https://bugs.freedesktop.org/show_bug.cgi?id=87061#c5">Comment # 5</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - 1600x1200 resolution breaks at startup, but works later with xrandr"
href="https://bugs.freedesktop.org/show_bug.cgi?id=87061">bug 87061</a>
from <span class="vcard"><a class="email" href="mailto:xavier@bachelot.org" title="Xavier Bachelot <xavier@bachelot.org>"> <span class="fn">Xavier Bachelot</span></a>
</span></b>
<pre>I think what happens is the following : the initial resolution is set to
1600x1200@75Hz, which exceed the memory bandwidth limit. When xrandr set the
resolution, it set the mode to 1600x1200 @60Hz, which does not exceed the
bandwidth.
The 1600x1200@75 mode is validated in iga1_crtc_mode_fixup by
ViaFirstCRTCModeValid, but then rejected by the later bandwidth check. One
would expect it then fallback to the next available mode in the EDID, that is
1600x1200@60, but it seems that doesn't happen. I'll try to dig more to
understand what happens, but I'm stuck for now.</pre>
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