Hello Aaron, On Mon, Mar 02, 2026 at 12:28:16AM +0000, Aaron D. Johnson wrote: > Uwe writes: > > I guess this problem is independent of ARCH=powerpc, still I added > > the debian-powerpc list to Cc: in case someone there has an idea. > > Perhaps? My Dell servers with EHCI hardware seem to be OK, but they > are all running 6.12.x kernels at present. > > > Is this problem reproducible? Does it also happen on a cold start? > > It is very reproducible. And "cold start" is weird on this platform. > I have tried completely powering off the server as part of the > troubleshooting process, but usually do use the much faster "activate > partition" action from the management server. > > > Does it make the machine boot if you add > > > > module_blacklist=ehci-pci,ehci-hcd,ehea > > > > to the kernel command line? If yes, can you please try to reduce > > the list of modules to blacklist and report back which is the > > relevant (or relevant combination) here? > > Well, no. But having looked at the kernel module loader source it > seems that the friendly '-' to '_' feature isn't there for the kernel > command line. So, > > module_blacklist=ehci_pci > > does the right thing. Which is good for me as 'ehea' is the Ethernet > driver.
You reported this issue about 6.18 while running 6.1. Does that mean that 6.1 works fine? If so, can you bisect over the packaged kernel packages to find out when the problem was introduced? Also trying 6.19 (currently in experimental) would be a good test. Another thing that might be worth to try: There are two different flavours for powerpc kernel: the normal ones and the 64k pages ones. IIUC your machine should be able to work with both flavours. It would be obscure but not totally unheard of, if this makes a difference. Other than that it might be worth to forward upstream to the USB and powerpc maintainers. But if you can do the bisection I suggest to wait with that and then include your findings in that report. > Unfortunately for our purposes here, this IBM beast is being gifted to > a friend sometime soon. I think I have it until 10 March. But am > happy to try new kernel packages until such time as it leaves my > possession. If this happens before the bug details are worked out and said friend won't continue the investigation, we'll probably close this bug. Best regards Uwe
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