** Attachment added: "policy.log"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1707641/+attachment/4924570/+files/policy.log
** Changed in: linux (Ubuntu)
Status: Incomplete => New
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https://bugs.launchpad.net/bugs/1707641
Title:
Sunix 2D VGA controller causes kernel panic and crash on boot
Status in linux package in Ubuntu:
Incomplete
Bug description:
When using Sunix latest low power VGA or DVI controller (see link
below) on Ubuntu 16.04, 17.04 or 17.10 with Kernel 4.11 and later
cause the system to crash on boot (the system will not become
reachable via network too, so I cannot extract any logs).
By using a second graphics controller I was able to extract the
attached kernel message from the system.
The issue also occurs with the latest mainline kernel (tested up to
4.13-rc3).
Sunix changed their graphics chip at some point from Volari Z11 to
Silicon Motion SM750. With the older generation, which uses the Z11,
everything is working.
Links to the graphics controllers which were previously mentioned:
http://www.sunix.com/en/product_detail.php?cid=1&kid=2&gid=15&pid=1760
http://www.sunix.com/en/product_detail.php?cid=1&kid=2&gid=15&pid=1766
previous generation Sunix 2D VGA controller:
http://www.sunix.com.tw/product/vga0411.html
When using Fedora 26 Server, which also uses Kernel 4.11+, everything
is working, too. So I'm not sure, if this is actually an upstream
issue.
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