18.04.2 login screen doesn't work if it uses 'wayland' and if video kernel driver is 'vgwfx' kernel driver
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
gdm3 (Ubuntu) |
New
|
Undecided
|
Unassigned | ||
linux (Ubuntu) |
Incomplete
|
Undecided
|
Unassigned | ||
wayland (Ubuntu) |
New
|
Undecided
|
Unassigned |
Bug Description
After an upgrade from xenial to 18.04.2 OR 18.04.1 to 18.04.2 ,the login screen doesn't work if 'Wayland' is in use (default) and if video kernel driver is 'vgwfx'.
It looks like the login screen got stuck, doesn't exit, and doesn't fallback to 'x11' by itself in case of failure.
Workaround:
- Access the machine via ssh or any other recovery approaches.
- Force the login screen to use x11:
File: /etc/gdm3/
[daemon]
# Uncoment the line below to force the login screen to use Xorg
WaylandEnable=false
I tried to reproduce the behaviour on my personal laptop, KVM guest, ... without success.
So far it is only reproducible when the 'vgwfx' driver is in use in combination with Wayland.
lspci -nnvvv
----
00:0f.0 VGA compatible controller [0300]: VMware SVGA II Adapter [15ad:0405] (prog-if 00 [VGA controller])
Subsystem: VMware SVGA II Adapter [15ad:0405]
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 64, Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 16
Region 0: I/O ports at 2040 [size=16]
Region 1: Memory at f0000000 (32-bit, prefetchable) [size=128M]
Region 2: Memory at fb800000 (32-bit, non-prefetchable) [size=8M]
Expansion ROM at 000c0000 [disabled] [size=128K]
Capabilities: [40] Vendor Specific Information: Len=00 <?>
Capabilities: [44] PCI Advanced Features
AFCap: TP+ FLR+
AFCtrl: FLR-
AFStatus: TP-
Kernel driver in use: vmwgfx
Kernel modules: vmwgfx
----
description: | updated |
This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1832903
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.