[Bug 110258] Lenovo V110-15AST AMD A9-9410 AMD R5 Stoney hangs after waking after suspend. 5.0-5.1rc2

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110258

--- Comment #6 from Hin-Tak Leung <htl10 at users.sourceforge.net> ---
A me-too. Although I have something to add: if I switch to a VT, I can suspend
and resume. However, Xorg after suspend is still f*cked - i.e. I can switch to
a text VT, suspend, resume in the VT and still have an operating VT; but if I
try to switch back to Xorg, the machine hangs at this point.

Hardware is (lspci -v)

00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Stoney [Radeon R2/R3/R4/R5 Graphics] (rev c1) (prog-if 00 [VGA controller])
        Subsystem: Acer Incorporated [ALI] Device 1099
        Flags: bus master, fast devsel, latency 0, IRQ 38
        Memory at e0000000 (64-bit, prefetchable) [size=256M]
        Memory at f0000000 (64-bit, prefetchable) [size=8M]
        I/O ports at 3000 [size=256]
        Memory at f0d00000 (32-bit, non-prefetchable) [size=256K]
        Expansion ROM at 000c0000 [disabled] [size=128K]
        Capabilities: [48] Vendor Specific Information: Len=08 <?>
        Capabilities: [50] Power Management version 3
        Capabilities: [58] Express Root Complex Integrated Endpoint, MSI 00
        Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
        Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010
<?>
        Capabilities: [270] Secondary PCI Express <?>
        Capabilities: [2b0] Address Translation Service (ATS)
        Capabilities: [2c0] Page Request Interface (PRI)
        Capabilities: [2d0] Process Address Space ID (PASID)
        Kernel driver in use: amdgpu
        Kernel modules: amdgpu

part of /proc/cpuinfo:

vendor_id       : AuthenticAMD
cpu family      : 21
model           : 112
model name      : AMD A9-9410 RADEON R5, 5 COMPUTE CORES 2C+3G

Lastly, it appears that the last time I suspend and resume okay was with
4.20.16-200.fc29.x86_64 ; 5.0.6-200.fc29.x86_64 and 5.0.7-200.fc29.x86_64 both
hangs on waking. I have no data between. Although, as noted, suspend and resume
in VT and staying in Vt, works - just that X is no longer functional after
resume.

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