[PATCH] iommu/intel: quirk to disable DMAR for QM57 igfx

2019-01-20 Thread Eric Wong
Joonas Lahtinen wrote: > Quoting Eric Wong (2019-01-04 03:06:26) > > Yeah, so the Debian bpo 4.17(.17) kernel did not set > > CONFIG_INTEL_IOMMU_DEFAULT_ON, so I didn't encounter problems. > > My self-built kernels all set CONFIG_INTEL_IOMMU_DEFAULT_ON. > > So it'

Re: iommu_intel or i915 regression in 4.18, 4.19.12 and drm-tip

2019-01-04 Thread Eric Wong
Joonas Lahtinen wrote: > Quoting Eric Wong (2018-12-27 13:49:48) > > I just got a used Thinkpad X201 (Core i5 M 520, Intel QM57 > > chipset) and hit some kernel panics while trying to view > > image/animation-intensive stuff in Firefox (X11) unless I use >

iommu_intel or i915 regression in 4.18, 4.19.12 and drm-tip

2018-12-27 Thread Eric Wong
I just got a used Thinkpad X201 (Core i5 M 520, Intel QM57 chipset) and hit some kernel panics while trying to view image/animation-intensive stuff in Firefox (X11) unless I use "iommu_intel=igfx_off". With Debian stable backport kernels, "linux-image-4.17.0-0.bpo.3-amd64" (4.17.17-1~bpo9+1) has

Re: radeon vs radeonfb Mobility quirks (Thinkpad X32)

2018-11-09 Thread Eric Wong
Benjamin Herrenschmidt wrote: > There's a whole pile of power management stuff for ancient laptops that > never quite made it from radeonfb to the radeon DRM driver... sadly it > also prevents sleep on old PowerBooks but I haven't had many complaints > so... Thanks for the confirmation that

radeon vs radeonfb Mobility quirks (Thinkpad X32)

2018-11-04 Thread Eric Wong
My Thinkpad X32 (r100, Mobility M6) can't suspend or hibernate with KMS using the "radeon" driver. "radeonfb" and the VESA fallback (no KMS) are both fine. It seems to be the same bug as: https://bugs.freedesktop.org/show_bug.cgi?id=38554 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=583120