* Re: [REGRESSION] [Bug 216859] New: PCI bridge to bus boot hang at enumeration [not found] <20230112200819.GA1785077@bhelgaas> @ 2023-01-26 12:11 ` Bjorn Helgaas 2023-02-01 22:30 ` Bjorn Helgaas 0 siblings, 1 reply; 2+ messages in thread From: Bjorn Helgaas @ 2023-01-26 12:11 UTC (permalink / raw) To: Thomas Zimmermann Cc: Takashi Iwai, linux-pci, alsa-devel, linux-kernel, Zeno R.R. Davatz, Krzysztof Wilczyński, Javier Martinez Canillas, Antonino Daplas, Helge Deller, linux-fbdev, dri-devel, regressions [+cc folks from 145eed48de27 and framebuffer folks, regression list] On Thu, Jan 12, 2023 at 02:08:19PM -0600, Bjorn Helgaas wrote: > On Wed, Dec 28, 2022 at 06:02:48AM -0600, Bjorn Helgaas wrote: > > On Wed, Dec 28, 2022 at 08:37:52AM +0000, bugzilla-daemon@kernel.org wrote: > > > https://bugzilla.kernel.org/show_bug.cgi?id=216859 > > > > > Summary: PCI bridge to bus boot hang at enumeration > > > Kernel Version: 6.1-rc1 > > > ... > > > > > With Kernel 6.1-rc1 the enumeration process stopped working for me, > > > see attachments. > > > > > > The enumeration works fine with Kernel 6.0 and below. > > > > > > Same problem still exists with v6.1. and v6.2.-rc1 This is a regression between v6.0 and v6.1-rc1. Console output during boot freezes after nvidiafb deactivates the VGA console. It was a lot of work for Zeno, but we finally isolated this console hang to 145eed48de27 ("fbdev: Remove conflicting devices on PCI bus"). The system actually does continue to boot and is accessible via ssh, but the console appears hung, at least for output. More details in the bugzilla starting at https://bugzilla.kernel.org/show_bug.cgi?id=216859#c47 . Bjorn ^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [REGRESSION] [Bug 216859] New: PCI bridge to bus boot hang at enumeration 2023-01-26 12:11 ` [REGRESSION] [Bug 216859] New: PCI bridge to bus boot hang at enumeration Bjorn Helgaas @ 2023-02-01 22:30 ` Bjorn Helgaas 0 siblings, 0 replies; 2+ messages in thread From: Bjorn Helgaas @ 2023-02-01 22:30 UTC (permalink / raw) To: Thomas Zimmermann Cc: Krzysztof Wilczyński, alsa-devel, regressions, Antonino Daplas, Takashi Iwai, linux-pci, Helge Deller, linux-kernel, dri-devel, Javier Martinez Canillas, linux-fbdev, Zeno R.R. Davatz, Geert Uytterhoeven [+cc Geert] On Thu, Jan 26, 2023 at 06:11:24AM -0600, Bjorn Helgaas wrote: > On Thu, Jan 12, 2023 at 02:08:19PM -0600, Bjorn Helgaas wrote: > > On Wed, Dec 28, 2022 at 06:02:48AM -0600, Bjorn Helgaas wrote: > > > On Wed, Dec 28, 2022 at 08:37:52AM +0000, bugzilla-daemon@kernel.org wrote: > > > > https://bugzilla.kernel.org/show_bug.cgi?id=216859 > > > > > > > Summary: PCI bridge to bus boot hang at enumeration > > > > Kernel Version: 6.1-rc1 > > > > ... > > > > > > > With Kernel 6.1-rc1 the enumeration process stopped working for me, > > > > see attachments. > > > > > > > > The enumeration works fine with Kernel 6.0 and below. > > > > > > > > Same problem still exists with v6.1. and v6.2.-rc1 > > This is a regression between v6.0 and v6.1-rc1. Console output during > boot freezes after nvidiafb deactivates the VGA console. > > It was a lot of work for Zeno, but we finally isolated this console > hang to 145eed48de27 ("fbdev: Remove conflicting devices on PCI bus"). > > The system actually does continue to boot and is accessible via ssh, > but the console appears hung, at least for output. More details in > the bugzilla starting at > https://bugzilla.kernel.org/show_bug.cgi?id=216859#c47 . 145eed48de27 ("fbdev: Remove conflicting devices on PCI bus") doesn't say what the benefit is, or what would break if we reverted it. Does anybody have any clues? It would be nice to resolve this regression before v6.2, which will probably be released 2/12 or 2/19. Bjorn ^ permalink raw reply [flat|nested] 2+ messages in thread
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2023-01-26 12:11 ` [REGRESSION] [Bug 216859] New: PCI bridge to bus boot hang at enumeration Bjorn Helgaas
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