On Wed, Nov 22, 2023 at 07:06:50AM +0700, Bagas Sanjaya wrote:
> Hi,
> 
> I notice a regression report on Bugzilla [1]. Quoting from it:
> 
> > After upgrading from 6.5.9 to 6.6.1 on my Dell Latitude E6420 (Intel 
> > i5-2520M) with EndeavourOS, the boot process would hang at "loading initial 
> > ramdisk". The issue is present on the 6.6.1 release of both Linux and 
> > Linux-zen, but not the 6.5.9 release, which makes me think this is somehow 
> > upstream in the kernel, rather than to do with packaging. My current 
> > workaround is using the Linux LTS kernel.
> > 
> > I have been unable to consistently reproduce this bug. Between 50 and 30 
> > percent of the time, the "loading initial ramdisk" will display, the disk 
> > activity indicator will turn off briefly and then resume blinking, and then 
> > the kernel boots as expected. The other 50 to 70 percent of the time, the 
> > boot stops at "loading initial ramdisk" and the disk activity indicator 
> > turns off, and does not resume blinking. The disk activity light is 
> > constantly flashing during normal system operation, so I know it's not 
> > secretly booting but not updating the display. I haven't been able to 
> > replicate this issue in QEMU. I have seen similar bugs that have been 
> > solved by disabling IOMMU, but this has not had any effect. Neither has 
> > disabling graphics drivers and modesetting. I have been able to reproduce 
> > it while using Nouveau, so I don't believe it has to do with Nvidia's 
> > proprietary drivers.
> > 
> > Examining dmesg and journalctl, there doesn't appear to be ANY logs from 
> > the failed boots. I don't believe the kernel even is started on these 
> > failed boots. Enabling GRUB debug messages 
> > (linux,loader,init,fs,device,disk,partition) shows that the hang occurs 
> > after GRUB attempts to start the loaded image- it's able to load the image 
> > into memory, but the boot stalls after "Starting image" with a hex address 
> > (presumably the start addr of the kernel).  
> > 
> > I've been trying to compile the kernel myself to see if I can solve the 
> > issue, or at least aid in reproduceability, but this is not easy or fast to 
> > do on a 2012 i5 processor. I'll update if I can successfully recompile the 
> > kernel and if it yields any information.  
> > 
> > Please let me know if I should provide any additional information. This is 
> > my first time filing a bug here.
> 
> See Bugzilla for the full thread and attached grub output.
> 
> Anyway, I'm adding this regression to regzbot:
> 
> #regzbot introduced: v6.5..v6.6 
> https://bugzilla.kernel.org/show_bug.cgi?id=218173
> #regzbot title: initramfs loading hang on nouveau system (Dell Latitude E6420)
> 

Another reporter on Bugzilla had bisected the regression, so:

#regzbot introduced: a1b87d54f4e45f

Thanks.

-- 
An old man doll... just what I always wanted! - Clara

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