** Summary changed:

- After upgrade to 5.8.0-49/5.8.0-50 with Intel graphics (gen7, Haswell/Ivy 
Bridge) a lot of glitches render screen unusable
+ After upgrade to 5.8.0-49/5.8.0-50 with Intel graphics (Gen7: Haswell/Ivy 
Bridge) a lot of glitches render screen unusable

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https://bugs.launchpad.net/bugs/1924624

Title:
  After upgrade to 5.8.0-49/5.8.0-50 with Intel graphics (Gen7:
  Haswell/Ivy Bridge) a lot of glitches render screen unusable

Status in linux package in Ubuntu:
  Confirmed
Status in linux-meta-hwe-5.8 package in Ubuntu:
  Confirmed

Bug description:
  After upgrading to 5.8.0-49, on a laprtop with intel graphics, graphics was 
suddenly extremely glitchy.
  Icons from the desktop flash through the browser, windows top bar gets 
distorted, all sort of glitches appear, parts of characters are missing in 
terminal, scrolling is inconsistent and the whole desktop becomes unusable.
  Under wayland the graphics are a bit more stable, but lots of glitches appear 
anyway, video reproduction in browser is stuttering and wobbly.
  Booting with previous kernel 5.8.0-48 seems to fix the issues.
  5.8.0-50 is broken as well.

  this is the result of 'sudo lshw -c video' on my hp Elitebook 8470:

  *-display                 
         description: VGA compatible controller
         product: 3rd Gen Core processor Graphics Controller
         vendor: Intel Corporation
         physical id: 2
         bus info: pci@0000:00:02.0
         version: 09
         width: 64 bits
         clock: 33MHz
         capabilities: msi pm vga_controller bus_master cap_list rom
         configuration: driver=i915 latency=0
         resources: irq:33 memory:d4000000-d43fffff memory:c0000000-cfffffff 
ioport:4000(size=64) memory:c0000-dffff

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