Message ID | bug-194721-2300@https.bugzilla.kernel.org/ (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
https://bugzilla.kernel.org/show_bug.cgi?id=194721 Eugene Shalygin (eugene.shalygin@gmail.com) changed: What |Removed |Added ---------------------------------------------------------------------------- Regression|No |Yes
https://bugzilla.kernel.org/show_bug.cgi?id=194721 Eugene Shalygin (eugene.shalygin@gmail.com) changed: What |Removed |Added ---------------------------------------------------------------------------- Hardware|All |x86-64
https://bugzilla.kernel.org/show_bug.cgi?id=194721 --- Comment #1 from Michel Dänzer (michel@daenzer.net) --- This is https://bugs.freedesktop.org/show_bug.cgi?id=98502 . I suspect reading the config file always powered up the GPU, but Mesa only recently started reading the file.
https://bugzilla.kernel.org/show_bug.cgi?id=194721 --- Comment #2 from Eugene Shalygin (eugene.shalygin@gmail.com) --- Excuse me, but as it is written in the bug report, this was never the case before, and does not happen on my second (almost identical) laptop which runs Gentoo and kernel 4.10.0 right now.
https://bugzilla.kernel.org/show_bug.cgi?id=194721 --- Comment #3 from Michel Dänzer (michel@daenzer.net) --- Are both laptops using the same version of Mesa?
https://bugzilla.kernel.org/show_bug.cgi?id=194721 --- Comment #4 from Eugene Shalygin (eugene.shalygin@gmail.com) --- Yes, 17.0.0. But does it matter? The problem manifests itself when I do $ cat /sys/bus/pci/devices/0000:01:00.0/config or lspci does read this file.
https://bugzilla.kernel.org/show_bug.cgi?id=194721 --- Comment #5 from Eugene Shalygin (eugene.shalygin@gmail.com) --- And the second problem is even worse: if the dGPU was disabled using acpi_call, any read from that file hangs the reading process somewhere in the kernel. This also was neither the case before nor happen on the Gentoo machine or in Arch Linux with kernel version < 4.8.
https://bugzilla.kernel.org/show_bug.cgi?id=194721 mathieu.westphal@gmail.com changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |mathieu.westphal@gmail.com --- Comment #6 from mathieu.westphal@gmail.com --- I reproduce this bug as well. lspci hangs and freeze the system.
--- lspci.txt 2017-02-27 09:55:03.885457274 +0100 +++ lspci.txt.gentoo 2017-02-27 09:55:21.978499749 +0100 @@ -16,3 +16,3 @@ 00:1f.3 SMBus: Intel Corporation 8 Series/C220 Series Chipset Family SMBus Controller (rev 05) -01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Neptune XT [Radeon HD 8970M]