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From: Alex Dewar <>
To: Heiko Stuebner <>
Cc: Mauro Carvalho Chehab <>,
	Greg Kroah-Hartman <>,
	Hans Verkuil <>,
	Philipp Zabel <>,
	Boris Brezillon <>,
	linux-arm-kernel <>,
	"open list:ARM/Rockchip SoC..."
	Linux Kernel Mailing List <>,,
Subject: Re: [REGRESSION] Xorg segfaults on Asus Chromebook CP101 with Linux v5.2 (was Asus C101P Chromeboot fails to boot with Linux 5.2)
Date: Sat, 13 Jul 2019 17:43:05 +0100
Message-ID: <> (raw)
In-Reply-To: <2648434.ut0pN6mfR1@phil>

On 13/07/2019 16:17, Heiko Stuebner wrote:
> Hi,
> Am Samstag, 13. Juli 2019, 13:38:45 CEST schrieb Alex Dewar:
>> I initially thought my machine was failing to boot entirely, but it
>> turns out it was just failing to start the display manager. I managed to
>> escape to a tty by hammering the keyboard a bit.
>> I suspect the culprit is the rockchip_vpu driver (in staging/media),
>> which has been renamed to hantro in this merge window. When I run startx
>> from a terminal, X fails to start and Xorg segfaults (log here:
>> X seems to work without any
>> issues in v5.1.
> 5.2 also has support for Panfrost (Mali-Midgard GPUs) but I'm not
> sure if it already can support X11 yet and your X11 log mentions
> libglamoregl in the segfault stack trace.
> Apart from it bisect that Greg suggested you could also just try
> blacklisting either panfrost or vpu kernel modules
> /etc/udev/somewhere . This would prevent them from loading
> Hope that helps
> Heiko

Hi Heiko,

Thanks for this. I blacklisted the panfrost driver and X magically
started working again.

I'll try to do a bisect later to find the offending commit though.

In related news, it also seems that the sound and wifi drivers aren't
working either in 5.2 (although I need to do a bit more testing to
confirm the latter).


  reply index

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <>
     [not found] ` <>
     [not found]   ` <>
     [not found]     ` <>
2019-07-13 11:38       ` Alex Dewar
2019-07-13 14:47         ` Greg Kroah-Hartman
2019-07-13 15:17         ` Heiko Stuebner
2019-07-13 16:43           ` Alex Dewar [this message]
2019-07-13 22:58             ` Ezequiel Garcia

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