Created attachment 143363 [details] dmesg logs from different kernels I have KMS broken on my laptop Acer Aspire 8930G after upgrading from 4.10.13 to 4.11.2 kernel (also checked 4.11.9, the last version 4.20.7 and some versions between). With kernel parameter 'nouveau.modeset=0' it boots fine. Here is a picture how it looks on the screen after modeset: https://imgur.com/a/kr3rbFJ Laptops's lspci: 00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev 07) 00:01.0 PCI bridge: Intel Corporation Mobile 4 Series Chipset PCI Express Graphics Port (rev 07) 00:1a.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 03) 00:1a.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 03) 00:1a.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 03) 00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03) 00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 03) 00:1c.1 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 2 (rev 03) 00:1c.3 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 4 (rev 03) 00:1c.4 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 5 (rev 03) 00:1d.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 03) 00:1d.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 03) 00:1d.2 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 03) 00:1d.3 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 03) 00:1d.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 03) 00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 93) 00:1f.0 ISA bridge: Intel Corporation ICH9M LPC Interface Controller (rev 03) 00:1f.2 SATA controller: Intel Corporation 82801IBM/IEM (ICH9M/ICH9M-E) 4 port SATA Controller [AHCI mode] (rev 03) 00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 03) 00:1f.6 Signal processing controller: Intel Corporation 82801I (ICH9 Family) Thermal Subsystem (rev 03) 01:00.0 VGA compatible controller: NVIDIA Corporation G96M [GeForce 9700M GT] (rev a1) 02:00.0 Ethernet controller: Qualcomm Atheros AR8121/AR8113/AR8114 Gigabit or Fast Ethernet (rev b0) 05:00.0 Network controller: Intel Corporation WiFi Link 5100
Bisected to exact commit that breaks it: 800efb4c2857ec543fdc33585bbcb1fd5ef28337
Could you include your vbios? It's rather surprising that a change to fan control logic, intended to really only affect nv4x, would affect your display. But it's probably messing with GPIOs it shouldn't be touching ... or something?
Created attachment 143489 [details] vbios
Thanks. Upon further review, there was a fixup to the commit you bisected to, which is included in v4.20.11 or later. Can you try that? Or alternatively apply https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=118780066e30c34de3d9349710b51780bfa0ba83 to your tree.
Tried 4.20.12 version - nothing changed. This patch was included in 4.20.11 version: https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.11
Also removing call to nvkm_therm_update_linear_fallback on 4.20 branch fixes the issue.
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