Messages in this thread |  | | From | Martin Steigerwald <> | Subject | [REGRESSION] Linux 4.9-rc4: gfx glitches on Intel Sandybridge (was: Re: Linux 4.9-rc4) | Date | Sun, 06 Nov 2016 15:48:36 +0100 |
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Hi.
Am Samstag, 5. November 2016, 16:46:33 CET schrieb Linus Torvalds: > So it's once again a Saturday afternoon rather than Sunday, this time > because I felt this rc was already big enough.
With kernel 4.9-rc4 I saw gfx corruptions like
https://martin-steigerwald.de/tmp/display-issues-with-kernel-4.9-rc4.png
in Konversation, Konsole, Akregator and other KDE/Qt related apps up to the point of not being able to use these applications in a meaningful way.
I first thought this might be due to upgrading Qt from 5.6.1 to 5.7.1, yet after rebooting into 4.8 Linux kernel as packaged in Debian I saw no gfx glitches like that anymore.
Anything known about this?
Machine is ThinkPad T520 with Sandybridge graphics.
Kernel compiled with Debian distro GCC 6 but using no-pie makefile patch.
Next week and weekend will be pretty busy and this is a production machine, so bisection or any other time-consuming work on this is out of question for me. I can provide additional details in case they are easy and quick enough to obtain.
System information (now back on 4.8 kernel):
# phoronix-test-suite system-info
Phoronix Test Suite v5.2.1 System Information
Hardware: Processor: Intel Core i5-2520M @ 3.20GHz (4 Cores), Motherboard: LENOVO 42433WG, Chipset: Intel 2nd Generation Core Family DRAM, Memory: 16384MB, Disk: 300GB INTEL SSDSA2CW30 + 480GB Crucial_CT480M50, Graphics: Intel 2nd Generation Core Family IGP, Audio: Conexant CX20590, Monitor: P24T-7 LED, Network: Intel 82579LM Gigabit Connection + Intel Centrino Advanced-N 6205
Software: OS: Debian unstable, Kernel: 4.8.0-1-amd64 (x86_64), Desktop: KDE Frameworks 5, Display Server: X Server 1.18.4, Display Driver: modesetting 1.18.4, OpenGL: 3.3 Mesa 12.0.3, Compiler: GCC 6.2.0 20161103, File-System: btrfs, Screen Resolution: 3840x1080
# apt-show-versions | egrep "(^libgl1-mesa-dri|^libdrm-intel1|xserver-xorg- core)" | grep amd64 libdrm-intel1:amd64/sid 2.4.71-1 uptodate libgl1-mesa-dri:amd64/sid 12.0.3-3 uptodate xserver-xorg-core:amd64/sid 2:1.18.4-2 uptodate
Excerpt of glxinfo:
Extended renderer info (GLX_MESA_query_renderer): Vendor: Intel Open Source Technology Center (0x8086) Device: Mesa DRI Intel(R) Sandybridge Mobile (0x126) Version: 12.0.3 Accelerated: yes Video memory: 1536MB Unified memory: yes Preferred profile: core (0x1) Max core profile version: 3.3 Max compat profile version: 3.0 Max GLES1 profile version: 1.1 Max GLES[23] profile version: 3.0
X.org runs with modesetting driver (default was changed in Debian Sid a while back).
Thanks,
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