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| author | Francis Rowe <info@gluglug.org.uk> | 2015-11-06 22:43:29 +0000 |
|---|---|---|
| committer | Francis Rowe <info@gluglug.org.uk> | 2015-11-07 04:45:09 +0000 |
| commit | 95259e28ef047923258434898113d70c8e544eab (patch) | |
| tree | 1c0501bf4c7df1c31948184dabfc1e7c4c215a6e /docs/future/index.html | |
| parent | 707f9383a8189b0054730134340f20709f56f976 (diff) | |
| download | librebootfr-95259e28ef047923258434898113d70c8e544eab.tar.gz librebootfr-95259e28ef047923258434898113d70c8e544eab.zip | |
convert documentation to texinfo
Diffstat (limited to 'docs/future/index.html')
| -rw-r--r-- | docs/future/index.html | 599 |
1 files changed, 0 insertions, 599 deletions
diff --git a/docs/future/index.html b/docs/future/index.html deleted file mode 100644 index 41b64cae..00000000 --- a/docs/future/index.html +++ /dev/null @@ -1,599 +0,0 @@ -<!DOCTYPE html> -<html lang="en"> -<head> - <meta charset="utf-8"> - <title>libreboot tutorials</title> - - <style type="text/css"> - @import url('../css/main.css'); - </style> - - <meta name="viewport" content="width=device-width, initial-scale=1.0"> - <meta name="author" content="glugman"> - <meta name="description" content="tutorials for libreboot, the reboot library."> - <meta name="robots" content="all"> -</head> - -<body> - - <div class="section"> - - <h1 id="pagetop">Development notes</h1> - <p> - These are development notes, for future use. For old (obselete) notes, see <a href="old.html">old.html</a>. - </p> - <p> - Or go <a href="../tasks.html">back to main task list</a>. - </p> - - </div> - - <div class="section"> - - <h1>Table of contents</h1> - <ul> - <li><a href="#standard_test">Standard test</a></li> - <li><a href="#t60_cpu_microcode">T60 cpu microcode</a></li> - <li><a href="#i945_vram_size">i945 VRAM size</a></li> - <li><a href="#lcd_i945_incompatibility">LCD panels on i945 - fix incompatible panels</a></li> - <li><a href="#i945_vbt">i945 X60/T60 VBT implementation (experimental: testing)</a></li> - <li><a href="#intelvbttool_results">IntelVbtTool results</a></li> - <li><a href="#fallback_patches">Fallback patches for i945</a></li> - </ul> - - </div> - - <div class="section"> - - <h1 id="standard_test">standard test</h1> - <p> - These logs are usually obtained when testing changes related to graphics on i945 (X60 and T60). - </p> - <ul> - <li> - Make a copy of these files: - <ul> - <li>/var/log/dmesg</li> - <li>/var/log/kern.log</li> - <li>/var/log/Xorg.0.log</li> - <li>/proc/ioports</li> - <li>/proc/iomem</li> - <li>/sys/class/drm/card0/error</li> - </ul> - </li> - <li> - Record these outputs: - <ul> - <li>sudo intel_reg_dumper</li> - <li>uname -r</li> - <li>lspci -vvvvnnnnxxxx</li> - <li>sudo modprobe msr</li> - <li>sudo inteltool -a</li> - <li>sudo cbmem -c</li> - </ul> - </li> - <li> - Try some 3D games with latest kernel. - </li> - </ul> - - <p><a href="#pagetop">Back to top of page.</a></p> - - </div> - - <div class="section"> - - <h1 id="t60_cpu_microcode">T60 cpu microcode</h1> - - <p> - TODO: T60: find (for rare buggy CPUs that are unstable without microcode updates) if there is a workaround (patched kernel, special parameter, etc) So far, only 1 processor has been found to have issues. See microcode errata sheets http://download.intel.com/design/mobile/SPECUPDT/31407918.pdf and http://download.intel.com/design/mobile/SPECUPDT/30922214.pdf and then look at the debugging results collected in <a href="../t7200q">t7200q</a> directory (q means quirk). - </p> - - <p> - Every other T7200 tested so far has worked without microcode updates. - </p> - - <p><a href="#pagetop">Back to top of page.</a></p> - - </div> - - <div class="section"> - - <h1 id="i945_vram_size">i945 VRAM size</h1> - - <p> - Apparently, only 8MB VRAM is available on i945 GPUs (though it could do 64MB):<br/> - phcoder: No. Hardware default is 8 MiB. When I wanted to make it configurable, I saw that docs mention only one other alternative: 1MiB. Later isn't event enough for 1024x768 at 24bpp without any acceleration or double buffering. It's possible that there are undocumented values. Which options do you have in vendor BIOS? - How to find out how much vram you have:<br/> - phcoder: TOM - BSM<br/> - phcoder: check what vendor BIOS offers as options<br/> - fchmmr: I thought it could do 64MB usually<br/> - phcoder: not accorging to doc.<br/> - phcoder: see mobile-945-express-chipset-datasheet page 93<br/> - phcoder: see also src/northbridge/intel/i945/{early_init,northbridge,gma}.c<br/> - fchmmr: "011 = DVMT (UMA) mode, 8 MB of memory pre-allocated for<br/> - fchmmr: frame buffer."<br/> - fchmmr: "Others - reserved"<br/> - phcoder: the easiest way is a loop at this position which tries different values and reads (and prints) BSM with them<br/> - stefanct: fchmmr: they suggest that you change the value and look how BSM reacts to that<br/> - stefanct: as they pointed out earlier vram size = TOM - BSM<br/> - stefanct: different values of GMS<br/> - stefanct: phcoder: hm... this could be a hint. look at the text description of TOLUD at page 103<br/> - stefanct: it mentions 64 MB in the text about BSM as well<br/> - stefanct: table 18...<br/> - phcoder: stefanct: I have a guess which value make is 64 but I will not tell to avoid skewing test results<br/> - stefanct: phcoder: sure... i assumed you were not sure if it supports it at all. testing it properly is of course a good idea :)<br/> - stefanct: test the various possible (but reserved) values of GMS and see what the resulting VRAM size is<br/> - fchmmr: so, TOM - BSM - </p> - <p> - <a href="#pagetop">Back to top of page.</a> - </p> - - </div> - - <div class="section"> - - <h1 id="lcd_i945_incompatibility">LCD panels on i945 - fix incompatible panels</h1> - - <p> - Fix T60 issues (see incompatible panels listed at <a href="../hcl/index.html#supported_t60_list">../hcl/index.html#supported_t60_list</a>). - </p> - - <p> - Run that tool (resources/utilities/i945gpu/intel-regs.py) as root on systems with the offending panels in: - </p> - <ul> - <li>Coreboot (or libreboot, whatever) with VBIOS (disable native graphics also)</li> - <li>(Factory BIOS also?)</li> - </ul> - - <p> - This shows values in devicetree.cb and src/northbridge/intel/i945/gma.c, the idea is that you run it on factory bios or vbios - and that it will (might) show different values: then you try those in the native graphics (in libreboot). - </p> - - <p> - Other values/registers might also need to be added to the script for these tests. - </p> - - <p> - check if intel_bios_reader from intel-gpu-tools reports the same value (BIOS has a hardcoded value) for PWM modulation frequency. - This file can read the VBIOS (64K dump). - </p> - - <p> - Check other tools in intel-gpu-tools aswell, compare outputs. Possibly add more information to intel-regs.py output (submit changes to mtjm). - Do oprom trace / replay (<a href="http://www.coreboot.org/User:GNUtoo#How_to_get_rid_of_the_vbios_of_the_x60_.5BNew_Version.5D">http://www.coreboot.org/User:GNUtoo#How_to_get_rid_of_the_vbios_of_the_x60_.5BNew_Version.5D</a>) - </p> - - <p> - Study how EDID works and how gma.c handles it. - </p> - - <p> - Original getregs.py script can be found at <a href="http://hg.mtjm.eu/scripts/file/tip/intel-regs.py">http://hg.mtjm.eu/scripts/file/tip/intel-regs.py</a> - written by Michał Masłowski. - </p> - - <p> - About fixing remaining LCD panels on 5345:<br/> - 'polarity' is mentioned in coreboot log (cbmem -c). compare output (with working and non-working panel). (and see the other notes in docs/future/index.html) - </p> - <p> - There was a theory that working panels are - 6bpc (bits per colour) and nonworking are - 8bpc, but all EDIDs that we have here are - for 6bpc panels. - </p> - <p>We should compare coreboot logs - (from <code>cbmem -c</code> from systems with - working and nonworking panels.</p> - <p>How to dump EDID:</p> - <p> - # <b>apt-get install i2c-tools</b><br/> - # <b>modprobe i2c-dev</b><br/> - Find out the correct ID to use:<br/> - # <b>i2cdetect -l</b><br/> - Example:<br/> - # <b>i2cdump -y 2 0x50</b> - </p> - - <p> - Working panel: EDID dump from LG-Philips LP150E05-A2K1: - </p> -<pre> -No size specified (using byte-data access) - 0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef -00: XX ff ff ff ff ff ff 00 30 ae 43 40 00 00 00 00 X.......0?C@.... -10: 00 0f 01 03 80 1e 17 78 ea af 00 99 58 53 8c 2a .??????x??.?XS?* -20: 25 50 54 21 08 00 81 80 01 01 01 01 01 01 01 01 %PT!?.?????????? -30: 01 01 01 01 01 01 30 2a 78 20 51 1a 10 40 30 70 ??????0*x Q??@0p -40: 13 00 31 e4 10 00 00 18 28 23 78 20 51 1a 10 40 ?.1??..?(#x Q??@ -50: 30 70 13 00 31 e4 10 00 00 18 00 00 00 0f 00 90 0p?.1??..?...?.? -60: 43 32 90 43 28 14 06 00 32 0c 00 00 00 00 00 fe C2?C(??.2?.....? -70: 00 4c 50 31 35 30 45 30 35 2d 41 32 0a 20 00 9b .LP150E05-A2? .? -80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ -90: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ -a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ -b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ -c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ -d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ -e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ -f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ -</pre> - - <p> - Working panel: EDID dump from Boe-Hydis HT14P12-100 FRU: 13N7061 (Inverter FRU: 41W1010) - </p> - -<pre> - 0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef -00: 00 ff ff ff ff ff ff 00 30 ae 22 40 00 00 00 00 ........0?"@.... -10: 00 0f 01 03 80 1c 15 78 ea af 40 95 56 4a 8f 25 .??????x??@?VJ?% -20: 20 50 54 21 08 00 81 80 01 01 01 01 01 01 01 01 PT!?.?????????? -30: 01 01 01 01 01 01 30 2a 78 20 51 1a 10 40 30 70 ??????0*x Q??@0p -40: 13 00 1d d6 10 00 00 19 25 23 78 20 51 1a 10 40 ?.???..?%#x Q??@ -50: 30 70 13 00 1d d6 10 00 00 19 00 00 00 0f 00 90 0p?.???..?...?.? -60: 43 32 90 43 28 0f 01 00 09 e5 00 00 00 00 00 fe C2?C(??.??.....? -70: 00 48 54 31 34 50 31 32 2d 31 30 30 0a 20 00 3f .HT14P12-100? .? -80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ -90: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ -a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ -b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ -c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ -d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ -e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ -f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ -</pre> - -<p>LTN141XA-L01: revert to libreboot git commit c943281 to see this</p> - - <p> - <b>Non-</b>working panel: EDID dump from Samsung LTN150XG-L08: - </p> -<pre> - 0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef -00: 00 ff ff ff ff ff ff 00 30 ae 40 40 00 00 00 00 ........0?@@.... -10: 00 0f 01 03 80 1f 17 78 ea 2d 05 97 57 51 8a 27 .??????x?-??WQ?' -20: 23 50 54 21 08 00 01 01 01 01 01 01 01 01 01 01 #PT!?.?????????? -30: 01 01 01 01 01 01 64 19 00 40 41 00 26 30 18 88 ??????d?.@A.&0?? -40: 36 00 30 e4 10 00 00 19 28 15 00 40 41 00 26 30 6.0??..?(?.@A.&0 -50: 18 88 36 00 30 e4 10 00 00 19 00 00 00 0f 00 61 ??6.0??..?...?.a -60: 43 32 61 43 28 14 01 00 4c a3 58 47 00 00 00 fe C2aC(??.L?XG...? -70: 00 4c 54 4e 31 35 30 58 47 2d 4c 30 38 0a 00 6d .LTN150XG-L08?.m -80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ -90: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ -a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ -b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ -c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ -d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ -e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ -f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ -</pre> - <p><a href="#pagetop">Back to top of page.</a></p> - - </div> - - <div class="section"> - - <h1 id="i945_vbt">i945 gfx: X60/T60 VBT implementation (experimental: testing)</h1> - - <p> - intel_bios_dumper in intel-gpu-tools seems interesting. - </p> - <p> - <b>Use 'drm.debug=0x06' kernel parameter when booting in grub!</b> - </p> - <p> - Before each test run, boot a live USB and delete the old logs in /var/log (kernel log, xorg log, dmesg and so on). - </p> - <p> - Load (from the ROM) the runningvga.bin for each LCD panel on each system; do not execute it, only load it! (coreboot will have to be modified). - Rename the ROM appropriately, based on the system name and the panel name. coreboot_nativegfx_5868_plusrunningvga_t60_14_LTD141ECMB.rom, - for instance. Keep a copy for later use. - </p> - - <p>You are supposed to:</p> - <ul> - <li>enable native graphics in menuconfig</li> - <li>include the self-modified VGA ROM (load, but not execute) - for reverse engineering the correct VBT tables.</li> - </ul> - - <p> - With each boot, make notes about what you see and get logs using the <a href="#standard_test">standard test</a>. - You will need the files from <a href="#intelvbttool_results">#intelvbttool_results</a> for each system. - </p> - - Results (# means untested): - <ul> - <li> - <b>X60/X60s:</b> - <ul> - <li>TMD-Toshiba LTD121ECHB: #</li> - <li>CMO N121X5-L06: #</li> - <li>Samsung LTN121XJ-L07: #</li> - <li>BOE-Hydis HT121X01-101: #</li> - </ul> - </li> - <li> - <b>X60T XGA:</b> - <ul> - <li>BOE-Hydis HV121X03-100: #</li> - </ul> - </li> - <li> - <b>X60T SXGA+:</b> - <ul> - <li>BOE-Hydis HV121P01-100: #</li> - </ul> - </li> - <li> - <b>T60 14" XGA:</b> - <ul> - <li>Samsung LTN141XA-L01: #</li> - <li>CMO N141XC: #</li> - <li>BOE-Hydis HT14X14: #</li> - <li>TMD-Toshiba LTD141ECMB: #</li> - </ul> - </li> - <li> - <b>T60 14" SXGA+</b> - <ul> - <li>TMD-Toshiba LTD141EN9B: #</li> - <li>Samsung LTN141P4-L02: #</li> - <li>Boe-Hydis HT14P12: #</li> - </ul> - </li> - <li> - <b>T60 15" XGA</b> - <ul> - <li>Samsung LTN150XG-L08: #</li> - <li>LG-Philips LP150X09: #</li> - <li>13N7068 (IDtech): #</li> - <li>13N7069 (CMO): #</li> - - </ul> - </li> - <li> - <b>T60 15" SXGA+</b> - <ul> - <li>LG-Philips LP150E05-A2K1: #</li> - <li>BOE-Hydis HV150P01-100: #</li> - </ul> - </li> - <li> - <b>T60 15" UXGA</b> - <ul> - <li>BOE-Hydis HV150UX1-100: #</li> - <li>IDTech N150U3-L01: #</li> - <li>BOE-Hydis HV150UX1-102: #</li> - </ul> - </li> - <li> - <b>T50 15" QXGA</b> - <ul> - <li>IDtech IAQX10N: #</li> - <li>IDtech IAQX10S: #</li> - </ul> - </li> - </ul> - - <p><a href="#pagetop">Back to top of page</a></p> - - </div> - - <div class="section"> - - <h1 id="intelvbttool_results">intelvbttool test results (VGA ROM dumps)</h1> - <p> - The VBIOS on i945 (intel gpu) platforms is self-modifying; that is, - its contents change when you run it. intelvbttool takes a dump of - the currently running vbios, and parses it. - </p> - - <p> - The idea is that we can extract the VBT tables using this knowledge, on the X60, X60 Tablet and T60 (Intel GPU). - </p> - - <p> - Here is an example of how VBT was implemented on the ThinkPad X230: - <a href="http://review.coreboot.org/#/c/5396">http://review.coreboot.org/#/c/5396</a>. - </p> - - <p> - You'll need to build a T60 ROM with SeaBIOS and the VGA ROM (for Intel GPU). An X60 ROM is also needed (same configuration, using the VGA ROM for X60). - </p> - - <p> - T60 has DVI on its dock, make sure that the dock is attached when getting this output. - </p> - - <p> - Get intelvbttool here: <a href="http://review.coreboot.org/#/c/5842">http://review.coreboot.org/#/c/5842</a> (util/intelvbttool). - </p> - - <p> - Now dump a copy of the running VGA BIOS: - <b>$ sudo dd if=/dev/mem bs=64k of=runningvga.bin skip=12 count=1</b><br/> - Then do (and record the output):<br/> - <b>$ ./intelvbttool runningvga.bin > intelvbttool_out</b> - </p> - - <p> - Backup both files (runningvga.bin and intelvbttool_out), renaming them to match the system and LCD panel used. - <a href="../misc/index.html#get_edid_panelname">../misc/index.html#get_edid_panelname</a> will show you how to get the name (model) of the LCD panel used. - </p> - - <h2>Test results (# means untested and all had docks, unless noted).</h2> - - <ul> - <li> - <b>X60/X60s:</b> - <ul> - <li>TMD-Toshiba LTD121ECHB: #</li> - <li>CMO N121X5-L06: #</li> - <li>Samsung LTN121XJ-L07: #</li> - <li>BOE-Hydis HT121X01-101: #</li> - </ul> - </li> - <li> - <b>X60T XGA (1024x768):</b> - <ul> - <li>BOE-Hydis HV121X03-100: #</li> - </ul> - </li> - <li> - <b>X60T SXGA+ (1400x1050):</b> - <ul> - <li>BOE-Hydis HV121P01-100: #</li> - </ul> - </li> - <li> - <b>T60 14" XGA (1024x768):</b> - <ul> - <li>Samsung LTN141XA-L01: #</li> - <li>CMO N141XC: #</li> - <li>BOE-Hydis HT14X14: #</li> - <li>TMD-Toshiba LTD141ECMB: #</li> - </ul> - </li> - <li> - <b>T60 14" SXGA+ (1400x1050):</b> - <ul> - <li>TMD-Toshiba LTD141EN9B: #</li> - <li>Samsung LTN141P4-L02: #</li> - <li>Boe-Hydis HT14P12: #</li> - </ul> - </li> - <li> - <b>T60 15" XGA (1024x768):</b> - <ul> - <li>Samsung LTN150XG-L08: #</li> - <li>LG-Philips LP150X09: #</li> - <li>13N7068 (IDtech): #</li> - <li>13N7069 (CMO): #</li> - </ul> - </li> - <li> - <b>T60 15" SXGA+ (1400x1050):</b> - <ul> - <li>LG-Philips LP150E05-A2K1: #</li> - <li>BOE-Hydis HV150P01-100: #</li> - </ul> - </li> - <li> - <b>T60 15" UXGA (1600x1200):</b> - <ul> - <li>BOE-Hydis HV150UX1-100: #</li> - <li>IDTech N150U3-L01: #</li> - <li>BOE-Hydis HV150UX1-102: #</li> - </ul> - </li> - <li> - <b>T60 15" QXGA (2048x1536):</b> - <ul> - <li>IDtech IAQX10N: #</li> - <li>IDtech IAQX10S: #</li> - </ul> - </li> - </ul> - - <p><a href="#pagetop">Back to top of page.</a></p> - - </div> - - <div class="section"> - - <h1 id="fallback_patches">Fallback patches</h1> - - <ul> - <li> - Todo: test gnutoo's fallback patches: <a href="http://www.coreboot.org/Fallback_mechanism">http://www.coreboot.org/Fallback_mechanism</a> - (some parts use systemd. adapt for upstart, which is what trisquel uses)<br/> - see <a href="gnutoo_fallback_patch">this IRC log</a> (warning, not cleaned up) - </li> - </ul> - - <p><a href="#pagetop">Back to top of page.</a></p> - - </div> - - <div class="section"> - - <h1 id="other">Other - unlisted (low priority)</h1> - - <ul> - <li> - PTE errors still exist on i945 with 6718 (which is merged). <a href="http://review.coreboot.org/#/c/6718/">http://review.coreboot.org/#/c/6718/</a> - <ul> - <li><a href="future/dumps/pte_x60_6718/dmesg">dmesg</a></li> - <li><a href="future/dumps/pte_x60_6718/kern.log">kern.log</a></li> - <li>This doesn't seem to cause any issues for general use.</li> - </ul> - </li> - <li> - Implement INT 10H support in i945 native graphics. (this will be a lot of work. SeaBIOS has code for some geode boards, to get a general idea). - </li> - <li> - T60 15" QXGA (2048x1536): fixed issue where GRUB wouldn't show any graphics. (Not many people have this panel) - <ul> - <li>It might be the same issue I ran into with Paul on the X60 (not enough memory being allocated) since the same code works on T60 SXGA+ and UXGA, where GRUB actually display graphics.</li> - </ul> - </li> - </ul> - - <p><a href="#pagetop">Back to top of page.</a></p> - - </div> - - <div class="section"> - - <p> - Copyright © 2014, 2015 Francis Rowe <info@gluglug.org.uk><br/> - Permission is granted to copy, distribute and/or modify this document - under the terms of the GNU Free Documentation License, Version 1.3 - or any later version published by the Free Software Foundation; - with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. - A copy of the license can be found at <a href="../gfdl-1.3.txt">../gfdl-1.3.txt</a> - </p> - - <p> - Updated versions of the license (when available) can be found at - <a href="https://www.gnu.org/licenses/licenses.html">https://www.gnu.org/licenses/licenses.html</a> - </p> - - <p> - UNLESS OTHERWISE SEPARATELY UNDERTAKEN BY THE LICENSOR, TO THE - EXTENT POSSIBLE, THE LICENSOR OFFERS THE LICENSED MATERIAL AS-IS - AND AS-AVAILABLE, AND MAKES NO REPRESENTATIONS OR WARRANTIES OF - ANY KIND CONCERNING THE LICENSED MATERIAL, WHETHER EXPRESS, - IMPLIED, STATUTORY, OR OTHER. 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