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<body><span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span> changed
<a class="bz_bug_link
bz_status_NEW "
title="NEW - Signal repeatedly lost with USB-C connection to monitor"
href="https://bugs.freedesktop.org/show_bug.cgi?id=104633">bug 104633</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Assignee</td>
<td>chris@chris-wilson.co.uk
</td>
<td>intel-gfx-bugs@lists.freedesktop.org
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<td style="text-align:right;">Product</td>
<td>xorg
</td>
<td>DRI
</td>
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<td style="text-align:right;">CC</td>
<td>
</td>
<td>intel-gfx-bugs@lists.freedesktop.org
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<td style="text-align:right;">Component</td>
<td>Driver/intel
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<td>DRM/Intel
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Signal repeatedly lost with USB-C connection to monitor"
href="https://bugs.freedesktop.org/show_bug.cgi?id=104633#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Signal repeatedly lost with USB-C connection to monitor"
href="https://bugs.freedesktop.org/show_bug.cgi?id=104633">bug 104633</a>
from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
<pre>(In reply to nico-freedesktop.org from <a href="show_bug.cgi?id=104633#c0">comment #0</a>)
<span class="quote">> I am connecting a Dell Latitude 5285 to a Samsung S27H850 by a USB-C cable
> (Hama USB 3.1, "full featured").
>
> It turns out to be stable working until the first time I suspend.
> </span >
<span class="quote">> Digging through the logs around the time the problem occured, I see the
> following (not sure if related or even the reason):
>
> Jan 14 12:51:35 manager kernel: RSP: 002b:00007fff80429728 EFLAGS: 00000246
> Jan 14 12:51:35 manager kernel: Failed to release pages: bind_count=1,
> pages_pin_count=1, pin_display=0</span >
That's an unrelated, mild warning.
<span class="quote">> And later:
>
> Jan 14 14:43:44 manager kernel: [drm] Reducing the compressed framebuffer
> size. This may lead to less power savings than a non-reduced-size. Try to
> increase stolen memory size if available in BIOS.
> Jan 14 14:43:51 manager kernel: usb 1-3: new high-speed USB device number 31
> using xhci_hcd
> Jan 14 14:43:52 manager kernel: acpi INT3400:00: Unsupported event [0x86]</span >
Indicates that the USB connection dropped and triggered an interrupt that the
acpi driver didn't handle. That maybe relevant.
Please attach the drm.debug=0xe dmesg from across the suspend to see if their
is a problem closer to home.</pre>
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