* Re: [Bug 216950] New: DisplayPort USB-C hub issue
[not found] <bug-216950-41252@https.bugzilla.kernel.org/>
@ 2023-01-18 21:14 ` Bjorn Helgaas
0 siblings, 0 replies; only message in thread
From: Bjorn Helgaas @ 2023-01-18 21:14 UTC (permalink / raw)
To: David Airlie, Daniel Vetter; +Cc: Marcin, linux-pci, dri-devel, regressions
On Wed, Jan 18, 2023 at 07:49:38PM +0000, bugzilla-daemon@kernel.org wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=216950
> Summary: DisplayPort USB-C hub issue
> Kernel Version: 6.2.0-rc3
> ...
> Created attachment 303624
> --> https://bugzilla.kernel.org/attachment.cgi?id=303624&action=edit
> dmidecode + kern.log
>
> I have HP 845 EliteBook G7 (Ryzen) and before 6.2.0-rc3 installation
> there was no issue with my laptop and HP docking station via USB-C.
>
> This kernel display behaves weirdly. LCD monitor (connected to
> docking station via DisplayPort) wakes up only once after reboot.
> Second docking connection ends up with blank external screen and
> only restart helps.
>
> Display manager detects extra screen and even newly launched apps
> land there.
>
> I didn't have such issues with original distro kernel
> 5.16.15-76051615-generic
This report (which looks like a regression between
5.16.15-76051615-generic and 6.2.0-rc3) was raised against PCI, but I
don't see PCI issues in the logs. Any DRM ideas?
Bjorn
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2023-01-18 21:14 ` [Bug 216950] New: DisplayPort USB-C hub issue Bjorn Helgaas
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