Bug#991967: linux-src 4.19.194-3 breaks Xen Dom0 powerdown and reboot
On 9/21/21 7:22 AM, Fr. Chuck Zmudzinski, C.P.M. wrote: On Sat, 7 Aug 2021 08:40:14 +0200 Salvatore Bonaccorso wrote: > Control: tags -1 + moreinfo > > Hi, > > On Fri, Aug 06, 2021 at 11:50:54AM -0700, Elliott Mitchell wrote: > > Package: src:linux > > Version: 4.19.194-3 > > Control: affects -1 src:xen > > > > SSIA. Previous versions of 4.19 had no issues (4.19.181-1 according to > > notes), but this cropped up with 4.19.194-3 (-1 and -2 weren't tested). > > > > When a Xen domain 0 tries to reboot or powerdown the computer, it hangs > > with the display off, but the power supply is active. > > > > I'm rebuilding from source, so I imagine this also effects > > linux-image-4.19.0-17-amd64. > > Can you please try to bisect which commit introduced the issue? Does > it affect as well current upstream 4.19.201? > > Regards, > Salvatore > > Dear Salvatore, As you have noticed, much more information about this bug has been added to this bug report, but the original reporter is of the opinion that much of that new information concerns a bug related to but distinct from the bug he reported. Both bugs have the same symptom: dom0 does not power down when shutting down the system, and it is clear that both bugs are related to x86 acpi code in either the Linux kernel or in the Xen hypervisor. But I cannot reproduce his original bug which occurred in Linux 4.19.194-3 on Xen-4.11 from buster. I have only seen the bug in Xen-4.14 for bullseye, and I always see it with Xen-4.14 regardless of the Linux kernel version. As far as I can tell, another participant in this bug report has reproduced the behavior I am seeing, but not the behavior the original reporter is seeing: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=991967#54 Would you endorse the original reporter's belief that there are two distinct bugs being discussed here? If so, I would be inclined to report the bug I am seeing as a distinct but related bug in the bullseye version of src:xen. Otherwise, I respectfully ask that you reclassify this as a bug in src:xen, since the original reporter has not been able to identify a commit in src:linux that caused the bug and no one has been able to reproduce the bug on Xen-4.11/Linux-4.19.194-3. Regards, Chuck Zmudzinski Allow me to propose the following arguments in favor of changing this to a bug in src:xen: 1) The original report of this bug in src:linux version 4.19.194-3 with Xen 4.11 has not been reproduced by anyone. 2) The same symptom has been reproduced in recent versions of src:xen for bullseye, with Xen version 4.14.x 3) For the future, what is the point of trying to fix a bug in oldstable? Why not concern ourselves with fixing the bug as it now appears in stable? Regards, Chuck Zmudzinski
Bug#991967: linux-src 4.19.194-3 breaks Xen Dom0 powerdown and reboot
On Sat, 7 Aug 2021 08:40:14 +0200 Salvatore Bonaccorso wrote: > Control: tags -1 + moreinfo > > Hi, > > On Fri, Aug 06, 2021 at 11:50:54AM -0700, Elliott Mitchell wrote: > > Package: src:linux > > Version: 4.19.194-3 > > Control: affects -1 src:xen > > > > SSIA. Previous versions of 4.19 had no issues (4.19.181-1 according to > > notes), but this cropped up with 4.19.194-3 (-1 and -2 weren't tested). > > > > When a Xen domain 0 tries to reboot or powerdown the computer, it hangs > > with the display off, but the power supply is active. > > > > I'm rebuilding from source, so I imagine this also effects > > linux-image-4.19.0-17-amd64. > > Can you please try to bisect which commit introduced the issue? Does > it affect as well current upstream 4.19.201? > > Regards, > Salvatore > > Dear Salvatore, As you have noticed, much more information about this bug has been added to this bug report, but the original reporter is of the opinion that much of that new information concerns a bug related to but distinct from the bug he reported. Both bugs have the same symptom: dom0 does not power down when shutting down the system, and it is clear that both bugs are related to x86 acpi code in either the Linux kernel or in the Xen hypervisor. But I cannot reproduce his original bug which occurred in Linux 4.19.194-3 on Xen-4.11 from buster. I have only seen the bug in Xen-4.14 for bullseye, and I always see it with Xen-4.14 regardless of the Linux kernel version. As far as I can tell, another participant in this bug report has reproduced the behavior I am seeing, but not the behavior the original reporter is seeing: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=991967#54 Would you endorse the original reporter's belief that there are two distinct bugs being discussed here? If so, I would be inclined to report the bug I am seeing as a distinct but related bug in the bullseye version of src:xen. Otherwise, I respectfully ask that you reclassify this as a bug in src:xen, since the original reporter has not been able to identify a commit in src:linux that caused the bug and no one has been able to reproduce the bug on Xen-4.11/Linux-4.19.194-3. Regards, Chuck Zmudzinski
Bug#991967: linux-src 4.19.194-3 breaks Xen Dom0 powerdown and reboot
Control: tags -1 + moreinfo Hi, On Fri, Aug 06, 2021 at 11:50:54AM -0700, Elliott Mitchell wrote: > Package: src:linux > Version: 4.19.194-3 > Control: affects -1 src:xen > > SSIA. Previous versions of 4.19 had no issues (4.19.181-1 according to > notes), but this cropped up with 4.19.194-3 (-1 and -2 weren't tested). > > When a Xen domain 0 tries to reboot or powerdown the computer, it hangs > with the display off, but the power supply is active. > > I'm rebuilding from source, so I imagine this also effects > linux-image-4.19.0-17-amd64. Can you please try to bisect which commit introduced the issue? Does it affect as well current upstream 4.19.201? Regards, Salvatore
Bug#991967: linux-src 4.19.194-3 breaks Xen Dom0 powerdown and reboot
Package: src:linux Version: 4.19.194-3 Control: affects -1 src:xen SSIA. Previous versions of 4.19 had no issues (4.19.181-1 according to notes), but this cropped up with 4.19.194-3 (-1 and -2 weren't tested). When a Xen domain 0 tries to reboot or powerdown the computer, it hangs with the display off, but the power supply is active. I'm rebuilding from source, so I imagine this also effects linux-image-4.19.0-17-amd64. Seems .194 caused multiple problems for Xen given 990642. -- (\___(\___(\__ --=> 8-) EHM <=-- __/)___/)___/) \BS (| ehem+sig...@m5p.com PGP 87145445 |) / \_CS\ | _ -O #include O- _ | / _/ 8A19\___\_|_/58D2 7E3D DDF4 7BA6 <-PGP-> 41D1 B375 37D0 8714\_|_/___/5445
