Errors/freezes when SLI is enabled with legacy driver

Graphics / Linux Linux
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1

I’m running openSUSE Leap 15.3 with two GTX 580. That system was running fine with Windows 10 before and the latest available legacy driver. In openSUSE, when I enable SLI in the Xorg config, NVRM errors show up in dmesg and the xserver shows erradic behavior (freezes, stale images). I also experience issues running certain 3D applications. When I remove the SLI configuration, the system works perfectly fine again. I’m seeing lots of Xid 32 errors in dmesg:

...
[   49.470435] caller _nv001015rm+0x1bf/0x1f0 [nvidia] mapping multiple BARs
[   57.927971] NVRM: GPU at PCI:0000:01:00: GPU-055ec77c-cb43-e0e3-bfa8-ec85c64dee03
[   57.927978] NVRM: Xid (PCI:0000:01:00): 32, Channel ID 00000005 intr 00800000
[   57.928268] NVRM: Xid (PCI:0000:01:00): 32, Channel ID 00000005 intr 00800000
[   57.988101] NVRM: Xid (PCI:0000:01:00): 32, Channel ID 00000005 intr 00800000
[   57.988373] NVRM: Xid (PCI:0000:01:00): 32, Channel ID 00000005 intr 00800000
[   58.104467] NVRM: Xid (PCI:0000:01:00): 32, Channel ID 00000005 intr 00800000
[   58.104798] NVRM: Xid (PCI:0000:01:00): 32, Channel ID 00000005 intr 00800000
[   58.394654] NVRM: Xid (PCI:0000:01:00): 32, Channel ID 00000005 intr 00800000
[   58.394993] NVRM: Xid (PCI:0000:01:00): 32, Channel ID 00000005 intr 00800000
...

I created a bug report too but how can I upload it?

2

Rather save the effort, SLI was never really working/useful in Linux. If you really want to try, maybe use an LTS kernel <5.0 (e.g. 4.19.x).

3

Hmm, that’s sad to hear. On Windows 10 that setup still allowed me to play some games a single GTX 580 would be too slow for (as long as it wasn’t too VRAM hungry). I will check if I can go to an older kernel without changing my distribution.

Unfortunately, nouveau does not have any SLI support, so that’s not gonna help either.

I added the bug report if anybody wants to have a look: nvidia-bug-report.log.gz (547.8 KB)